diff --git a/testsuites/unittest/basic/exc/smoke/it_test_exc_002.cpp b/testsuites/unittest/basic/exc/smoke/it_test_exc_002.cpp
index 45b941f115ea318a160c08b60101395118819ea9..91e4eebcf647a3b4a3dbc1237d2e5e902d9c004e 100644
--- a/testsuites/unittest/basic/exc/smoke/it_test_exc_002.cpp
+++ b/testsuites/unittest/basic/exc/smoke/it_test_exc_002.cpp
@@ -79,8 +79,6 @@ static int TestThread(void)
 
 static int TestCase(void)
 {
-    int *test = nullptr;
-    int count = 5;
     int status = 0;
     int ret;
     pid_t pid = fork();
diff --git a/testsuites/unittest/basic/exc/smoke/it_test_exc_003.cpp b/testsuites/unittest/basic/exc/smoke/it_test_exc_003.cpp
index c275cd655010d10f7ad108871fc87c7cba786351..ec1d49b83b66dd6ce6de5b5ed8f2f4bf46d623dc 100644
--- a/testsuites/unittest/basic/exc/smoke/it_test_exc_003.cpp
+++ b/testsuites/unittest/basic/exc/smoke/it_test_exc_003.cpp
@@ -32,11 +32,12 @@
 #include "pthread.h"
 
 #define TEST_THREAD_COUNT 5
+
 static volatile int g_testCondFlag;
 static int g_count[TEST_THREAD_COUNT];
+
 static void *ThreadFunc2(void *arg)
 {
-    int count = *(int *)arg;
     int *test = nullptr;
 
     g_testCondFlag++;
@@ -85,8 +86,6 @@ static int TestThread(void)
 
 static int TestCase(void)
 {
-    int *test = nullptr;
-    int count = 5;
     int status = 0;
     int ret;
 
diff --git a/testsuites/unittest/basic/exc/smoke/it_test_exc_004.cpp b/testsuites/unittest/basic/exc/smoke/it_test_exc_004.cpp
index 6ad1462a57daab1f48b374c47fcb2d589bfaccb6..8009e3470ecb21c25b0f2aed47153fb09d5da74f 100644
--- a/testsuites/unittest/basic/exc/smoke/it_test_exc_004.cpp
+++ b/testsuites/unittest/basic/exc/smoke/it_test_exc_004.cpp
@@ -56,8 +56,6 @@ static int TestThread(void)
 
 static int TestCase(void)
 {
-    int *test = nullptr;
-    int count = 5;
     int status = 0;
     int ret;
 
diff --git a/testsuites/unittest/basic/mem/shm/full/shm_test_001.cpp b/testsuites/unittest/basic/mem/shm/full/shm_test_001.cpp
index 6cb107d3ae7b4fb8f861e4d8dd9db669323d737b..e45a72529e1cd0585e4b64bbaf5aea9988ef0ac0 100644
--- a/testsuites/unittest/basic/mem/shm/full/shm_test_001.cpp
+++ b/testsuites/unittest/basic/mem/shm/full/shm_test_001.cpp
@@ -127,14 +127,13 @@ VOID *ShmWriteFunc(VOID *ptr)
 }
 
 
-static int Testcase(VOID)
+static int Testcase(void)
 {
     pthread_t newPthread[2];
     int curThreadPri, curThreadPolicy;
     pthread_attr_t a = { 0 };
     struct sched_param param = { 0 };
     int ret;
-    int i, j;
 
     g_threadCount = 0;
 
@@ -159,7 +158,7 @@ static int Testcase(VOID)
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
 
     ICUNIT_ASSERT_EQUAL(g_threadCount, 2, g_threadCount);
-    
+
     return 0;
 }
 
diff --git a/testsuites/unittest/basic/mem/shm/full/shm_test_005.cpp b/testsuites/unittest/basic/mem/shm/full/shm_test_005.cpp
index 2e0da0ceae599d99476e51814647f54e7f5d57fd..87628ff2b561d63740e17709c56ce4b0ab796743 100644
--- a/testsuites/unittest/basic/mem/shm/full/shm_test_005.cpp
+++ b/testsuites/unittest/basic/mem/shm/full/shm_test_005.cpp
@@ -30,13 +30,11 @@
  */
 #include "it_test_shm.h"
 
-static int Testcase(VOID)
+static int Testcase(void)
 {
     int shmid;
     int ret;
     void *shm = NULL;
-    void *vaddrPageAlign = NULL;
-    void *vaddr = NULL;
 
     errno = 0;
     shmid = shmget(0x111, PAGE_SIZE, 0777 | IPC_EXCL);
diff --git a/testsuites/unittest/basic/mem/vm/smoke/mmap_test_008.cpp b/testsuites/unittest/basic/mem/vm/smoke/mmap_test_008.cpp
index 2d024751bd7c8df6b43ed39709cc6ee4f7a1e54d..42bceb241b96afea05bc5797c4534c4222ef4a2a 100644
--- a/testsuites/unittest/basic/mem/vm/smoke/mmap_test_008.cpp
+++ b/testsuites/unittest/basic/mem/vm/smoke/mmap_test_008.cpp
@@ -42,9 +42,6 @@ static int Testcase(void)
     void *mem = NULL;
     void *memFix = NULL;
     void *memNoFix = NULL;
-    void *pre = NULL;
-    void *next = NULL;
-    void *overlay = NULL;
     int ret;
 
     mem = mmap((void *)fixAddr, len, PROT_READ | PROT_WRITE, flags | MAP_FIXED, -1, 0);
diff --git a/testsuites/unittest/basic/mem/vm/smoke/mmap_test_009.cpp b/testsuites/unittest/basic/mem/vm/smoke/mmap_test_009.cpp
index 57211386e10a1092d88bddf98fd2f0b29d40f712..2bfc6e903833c8012ad21b897910db534ef88899 100644
--- a/testsuites/unittest/basic/mem/vm/smoke/mmap_test_009.cpp
+++ b/testsuites/unittest/basic/mem/vm/smoke/mmap_test_009.cpp
@@ -38,7 +38,7 @@
 /* Test PROT_NONE flag */
 static int Testcase(void)
 {
-    int ret, param;
+    int ret;
     int *ptr = NULL;
     int status = 0;
     pid_t pid = fork();
diff --git a/testsuites/unittest/drivers/storage/smoke/storage_test_001.cpp b/testsuites/unittest/drivers/storage/smoke/storage_test_001.cpp
index 9e35c78f9288945dd721ada56a86b208cd167077..58c75bf0e544f1589265f19636042d6f688714f9 100644
--- a/testsuites/unittest/drivers/storage/smoke/storage_test_001.cpp
+++ b/testsuites/unittest/drivers/storage/smoke/storage_test_001.cpp
@@ -37,11 +37,10 @@
 #define DIOC_GETPRIV 0x1000
 #define INVALID_PTR 0x11111111
 
-static int Testcase(VOID)
+static int Testcase(void)
 {
     int ret;
     int fd = -1;
-    int i;
     ssize_t n;
     char *buf = NULL;
     void *bch = NULL;
diff --git a/testsuites/unittest/extended/signal/full/pipe_test_001.cpp b/testsuites/unittest/extended/signal/full/pipe_test_001.cpp
index fe13fd1d01abe1276f0da91d81ddade2f1e59530..645837d44b009bbf09dcb1eda0925fb014e30405 100644
--- a/testsuites/unittest/extended/signal/full/pipe_test_001.cpp
+++ b/testsuites/unittest/extended/signal/full/pipe_test_001.cpp
@@ -61,6 +61,9 @@ int TestPipeSingleProcess()
             (void)sprintf_s(a, sizeof(a), "%d", i);
             strcat(sentence1, a);
             int ret = write(*writeFd, sentence1, strlen(sentence1) + 1);
+            if (ret < 0) {
+                printf("write failed!\n");
+            }
             usleep(100000); // 100000, Used to calculate the delay time.
 
             printf("read\n");
diff --git a/testsuites/unittest/extended/signal/full/pipe_test_003.cpp b/testsuites/unittest/extended/signal/full/pipe_test_003.cpp
index 6c76e23b460004e24f7e6c1648ab4234493f6e2f..e4311dde7e4de7b068591d716c3ae83f4d58eae2 100644
--- a/testsuites/unittest/extended/signal/full/pipe_test_003.cpp
+++ b/testsuites/unittest/extended/signal/full/pipe_test_003.cpp
@@ -32,7 +32,7 @@
 #include "signal.h"
 #include "fcntl.h"
 
-int TestPipeSingleProcessFcntl()
+int TestPipeSingleProcessFcntl(void)
 {
     int pipefd[2]; // 2, array subscript
     pid_t pid;
@@ -61,10 +61,12 @@ int TestPipeSingleProcessFcntl()
             (void)sprintf_s(a, sizeof(a), "%d", i);
             strcat(sentence1, a);
             int ret = write(*writeFd, sentence1, strlen(sentence1) + 1);
+            if (ret < 0) {
+                printf("write failed!\n");
+            }
             usleep(100000); // 100000, Used to calculate the delay time.
         }
         char sentence1[15] = "Hello World";
-        char a[4] = {0};
         usleep(10000); // 10000, Used to calculate the delay time.
         printf("read\n");
         memset(readbuffer, 0, sizeof(readbuffer));
diff --git a/testsuites/unittest/extended/signal/full/pipe_test_005.cpp b/testsuites/unittest/extended/signal/full/pipe_test_005.cpp
index 9b490529dad9dbf7da2dd0c3e700ceb162ed23b5..647a8447d951a5be0d3778e87f178cb634e3a4f0 100644
--- a/testsuites/unittest/extended/signal/full/pipe_test_005.cpp
+++ b/testsuites/unittest/extended/signal/full/pipe_test_005.cpp
@@ -37,7 +37,7 @@ static void SigPrint(int signum)
     printf("Pipe break\n");
 }
 
-static int PipecommonWrite()
+static int PipecommonWrite(void)
 {
     int pipefd[2]; // 2, array subscript
     pid_t pid;
@@ -47,7 +47,6 @@ static int PipecommonWrite()
     int *readFd = &pipefd[0];
     int *writeFd = &pipefd[1];
     char sentence[] = "Hello World";
-    char readbuffer[100];
     int status, ret;
 
     retValue = pipe(pipefd);
diff --git a/testsuites/unittest/extended/signal/full/signal_test_001.cpp b/testsuites/unittest/extended/signal/full/signal_test_001.cpp
index 71e777bcff94f0c795bcd1777d416d4e2701be97..e0d30d856b374bcaec30bddf0db0ecffe7cac201 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_001.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_001.cpp
@@ -34,12 +34,13 @@
 
 static const int SIG_TEST_COUNT = 3;
 static int g_sigCount = 0;
+
 static void SigPrint(int sig)
 {
     g_sigCount++;
 }
 
-static int TestRaiseMuliti()
+static int TestRaiseMuliti(void)
 {
     int sig = SIGTERM;
     int count = 0;
@@ -138,7 +139,7 @@ static int TestCase(void)
             printf("errline  = %d\n", __LINE__);
             exit(-1);
         }
-        int status, rt;
+
         signal(SIGALRM, SigPrint);
         sigset_t sigmask, oldmask, pending;
         sigemptyset(&sigmask);
diff --git a/testsuites/unittest/extended/signal/full/signal_test_007.cpp b/testsuites/unittest/extended/signal/full/signal_test_007.cpp
index 1fcb74ee25d38e44774b56481d5db8abd469c657..33445e6f0cc972ce844321d9953808d4b9a40c61 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_007.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_007.cpp
@@ -32,7 +32,6 @@
 #include "signal.h"
 #include "sys/wait.h"
 
-static int g_break = 0;
 /* Sample : Father process want to free zombine child process */
 static void SigChildResponse(int signo)
 {
@@ -41,7 +40,7 @@ static void SigChildResponse(int signo)
 }
 
 /* Register SIGCHLD, through signal to restore the child memery */
-static int TestSigKillResp()
+static int TestSigKillResp(void)
 {
     void (*ret)(int) = nullptr;
     int fpid, fpids, status, retValue;
diff --git a/testsuites/unittest/extended/signal/full/signal_test_011.cpp b/testsuites/unittest/extended/signal/full/signal_test_011.cpp
index 1e84c4da3a5cb77abcbfafa15ee84c51ce2715cd..a54a1b88b82d03b1dae29d4e79041e9d1b25d646 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_011.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_011.cpp
@@ -39,7 +39,7 @@ static void SigPrint(int sig)
 static int TestSigTimeWait()
 {
     sigset_t set;
-    int sig, fpid, retValue, status;
+    int fpid, retValue, status;
     siginfo_t si;
     struct timespec ts;
     void (*retSig)(int);
diff --git a/testsuites/unittest/extended/signal/full/signal_test_016.cpp b/testsuites/unittest/extended/signal/full/signal_test_016.cpp
index 1e6eebc43bad5f6a2b3257cb839a6e3b9f543872..6f53d90ceff81d88716107d05b999e8d23c6e029 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_016.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_016.cpp
@@ -49,7 +49,6 @@ static void *ThreadSetFunc2(void *arg)
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
     retValue = sigaddset(&set, SIGUSR1);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
-    int count;
 
     retValue = sigwait(&set, &sig);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
@@ -67,7 +66,6 @@ static void *ThreadSetDfl(void *arg)
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
     retValue = sigaddset(&set, SIGUSR1);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
-    int count;
 
     retValue = sigwait(&set, &sig);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
@@ -80,7 +78,7 @@ static void *ThreadKill(void *arg)
     }
 }
 
-static int TestMultiPthreadKillPendNormal()
+static int TestMultiPthreadKillPendNormal(void)
 {
     int status, retValue, fpid;
     pthread_t thread, thread1, thread2;
@@ -118,7 +116,6 @@ static int TestMultiPthreadKillPendNormal()
         if (retValue != 0) {
             exit(retValue);
         }
-        int count;
 
         retValue = sigwait(&set, &sig);
         if (retValue != 0) {
diff --git a/testsuites/unittest/extended/signal/full/signal_test_017.cpp b/testsuites/unittest/extended/signal/full/signal_test_017.cpp
index 08968aa7cf288b313dabdd20fed4dc415fb32ca2..ed650e83a288ca783257dfc7bc91b8bea7cc251f 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_017.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_017.cpp
@@ -49,7 +49,6 @@ static void *ThreadSetFunc2(void *arg)
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
     retValue = sigaddset(&set, SIGUSR1);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
-    int count;
 
     retValue = sigwait(&set, &sig);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
@@ -67,7 +66,6 @@ static void *ThreadSetDfl(void *arg)
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
     retValue = sigaddset(&set, SIGUSR1);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
-    int count;
 
     retValue = sigwait(&set, &sig);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
@@ -85,7 +83,6 @@ static void *ThreadKill(void *arg)
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
     retValue = sigaddset(&set, SIGUSR1);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
-    int count;
 
     retValue = sigwait(&set, &sig);
     ICUNIT_ASSERT_EQUAL_NULL(retValue, 0, retValue);
diff --git a/testsuites/unittest/extended/signal/full/signal_test_018.cpp b/testsuites/unittest/extended/signal/full/signal_test_018.cpp
index cf7d275a68fda33f4df5c00ec4e279e7c6852d7c..d669cc2f097d8d9786f7bac6af97d95c820e8e18 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_018.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_018.cpp
@@ -40,7 +40,7 @@ static void SigPrint(int sig)
 static int TestSigTimeWaitKillProcess(void)
 {
     sigset_t set;
-    int sig, fpid, retValue, status;
+    int fpid, retValue, status;
     siginfo_t si;
     struct timespec ts;
 
diff --git a/testsuites/unittest/extended/signal/full/signal_test_019.cpp b/testsuites/unittest/extended/signal/full/signal_test_019.cpp
index 0235fc91bf7e8409cc68e40c72128ded4b4d0870..ccf3fc665759bcb85db8ba0587be8cd986d133f6 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_019.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_019.cpp
@@ -40,7 +40,7 @@ static void SigPrint(int sig)
 static int TestSigTimeWaitDirectKillChild(void)
 {
     sigset_t set;
-    int sig, fpid, retValue, status;
+    int fpid, retValue, status;
     siginfo_t si;
     struct timespec ts;
 
diff --git a/testsuites/unittest/extended/signal/full/signal_test_025.cpp b/testsuites/unittest/extended/signal/full/signal_test_025.cpp
index aef9dd8ff11cca4a3bd2f2ec53f574e9e9fb2727..3a1042294b2c8c25eb105ef0dabbce2ba1cec7f7 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_025.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_025.cpp
@@ -36,10 +36,9 @@ static void SigAlrm(int signum)
     printf("Alert rings.\n");
 }
 
-static int TestBlock()
+static int TestBlock(void)
 {
     int sig = SIGALRM;
-    void *ret;
     int retValue, status;
 
     int fpid = fork();
diff --git a/testsuites/unittest/extended/signal/full/signal_test_026.cpp b/testsuites/unittest/extended/signal/full/signal_test_026.cpp
index f555f2fd13888c826397f2209160fe5d8043ad6b..153aef181b2bd3c1b803b17552f41dccc8e1f030 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_026.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_026.cpp
@@ -37,10 +37,9 @@ static void SigPrint(int signum)
     printf("Signal Triggered\n");
 }
 
-static UINT32 TestCase(VOID)
+static UINT32 TestCase(void)
 {
-    int ret, sig;
-    struct itimerval newValue, oldValue;
+    int ret;
     siginfo_t info;
     sigset_t newset;
     struct timespec timeout;
diff --git a/testsuites/unittest/extended/signal/full/signal_test_028.cpp b/testsuites/unittest/extended/signal/full/signal_test_028.cpp
index ba48ed1753cd9b57f6c9ec6a9b9d4fcc58462b2f..6a9c332e80fab22b328e74fd86687b92e24a0001 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_028.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_028.cpp
@@ -49,7 +49,6 @@ static int TestSigset()
     // record mask words
     sigset_t sigset;
 
-    void *ret;
     int retValue, status;
 
     int fpid = fork();
diff --git a/testsuites/unittest/extended/signal/full/signal_test_040.cpp b/testsuites/unittest/extended/signal/full/signal_test_040.cpp
index 76654c6a02c579c612ff79b832f04977fef3a522..ba51c26b25a4d560ee82cda772a4752a5ae57448 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_040.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_040.cpp
@@ -32,20 +32,19 @@
 #include "signal.h"
 
 static int g_sigCount = 0;
-static int g_sigCount1 = 0;
+
 static void SigPrint(int sig)
 {
     (void)sig;
     g_sigCount++;
-    printf("signal receive success\cn");
+    printf("signal receive success\n");
 }
 
-static UINT32 TestCase(VOID)
+static UINT32 TestCase(void)
 {
     int pid = 0;
     int ret = 0;
-    void *retptr = NULL;
-    sigset_t newset, oldset;
+    sigset_t newset;
 
     sigemptyset(&newset);
     sigprocmask(SIG_SETMASK, &newset, NULL);
diff --git a/testsuites/unittest/extended/signal/full/signal_test_041.cpp b/testsuites/unittest/extended/signal/full/signal_test_041.cpp
index c8c818a42652e08762f19a2c631872a068e75f53..2421694555ad7633024b62e34e047711bc189ee8 100644
--- a/testsuites/unittest/extended/signal/full/signal_test_041.cpp
+++ b/testsuites/unittest/extended/signal/full/signal_test_041.cpp
@@ -38,6 +38,7 @@ static void Sigprint(int sig)
     (void)sig;
     printf("enter sighandle : -------------------------\n");
 }
+
 static void Sigprint111(int sig)
 {
     (void)sig;
@@ -129,7 +130,7 @@ static UINT32 TestCase(VOID)
 {
     int ret, retval;
     void *res = nullptr;
-    pthread_t newPthread, newPthread1;
+    pthread_t newPthread1;
     sigset_t set, oldset;
     sighandler_t sigret;
     sigret = signal(SIGUSR2, Sigprint111);
diff --git a/testsuites/unittest/extended/signal/smoke/mkfifo_test_002.cpp b/testsuites/unittest/extended/signal/smoke/mkfifo_test_002.cpp
index ffbf9fff8e4a92d1fbf98989124610ee7800a990..a75ad1fc2c86a6b16f0f66f014d21c1d3880bfae 100644
--- a/testsuites/unittest/extended/signal/smoke/mkfifo_test_002.cpp
+++ b/testsuites/unittest/extended/signal/smoke/mkfifo_test_002.cpp
@@ -37,14 +37,10 @@
 #include <fcntl.h>
 
 static const int NAME_BUF_SIZE = 500;
-static const int FAULT1 = 6;
-static const int FAULT2 = 7;
 
-static int TestMkfifoReturn()
+static int TestMkfifoReturn(void)
 {
-    int retValue, i;
-    int status = 0;
-    pid_t pid;
+    int retValue;
     char pathname[NAME_BUF_SIZE];
 
     retValue = mkfifo("/dev/fifo0", 0777); // 0777, mkfifo config.
diff --git a/testsuites/unittest/extended/signal/smoke/pipe_test_004.cpp b/testsuites/unittest/extended/signal/smoke/pipe_test_004.cpp
index 87e8243f3b031796a176cc2b11521ac9574aac55..1b89726afc485a3cc5ee0993ef061d08a21e5fa0 100644
--- a/testsuites/unittest/extended/signal/smoke/pipe_test_004.cpp
+++ b/testsuites/unittest/extended/signal/smoke/pipe_test_004.cpp
@@ -32,12 +32,9 @@
 #include "signal.h"
 #include "fcntl.h"
 
-#define FAULT1 11
-#define FAULT2 22
-int TestPipeReturn()
+int TestPipeReturn(void)
 {
-    int pipefd[2]; // 2, array subscript
-    int retValue, i, status;
+    int retValue;
     retValue = pipe(NULL);
     ICUNIT_ASSERT_EQUAL(retValue, -1, retValue);
     ICUNIT_ASSERT_EQUAL(errno, EFAULT, errno);
diff --git a/testsuites/unittest/extended/signal/smoke/signal_test_009.cpp b/testsuites/unittest/extended/signal/smoke/signal_test_009.cpp
index dc36dde77f3114a9baea2f2859e2dbf6dfaca808..eed98cc42df6bb30675adf694e896ceb5855ff86 100644
--- a/testsuites/unittest/extended/signal/smoke/signal_test_009.cpp
+++ b/testsuites/unittest/extended/signal/smoke/signal_test_009.cpp
@@ -83,7 +83,6 @@ static int TestSigSet(void)
     ICUNIT_ASSERT_EQUAL(set.__bits[0], 0x10, set.__bits[0]);
     ICUNIT_ASSERT_EQUAL(retValue, 0, retValue);
 
-    int sigs;
     sigset(1, SigPrint1);
 
     retValue = raise(1);
diff --git a/testsuites/unittest/extended/signal/smoke/signal_test_013.cpp b/testsuites/unittest/extended/signal/smoke/signal_test_013.cpp
index 6ccd38029d7cd9bdfda0b460f4d12ea64cb26110..f3a5bcede339194781b54fcb68f94367ce310739 100644
--- a/testsuites/unittest/extended/signal/smoke/signal_test_013.cpp
+++ b/testsuites/unittest/extended/signal/smoke/signal_test_013.cpp
@@ -100,7 +100,6 @@ static int TestSigMultiPthread(void)
     int status;
     int *status1 = nullptr;
     int ret;
-    int count;
     pthread_t thread, thread1, thread2;
 
     fpid = fork();
diff --git a/testsuites/unittest/extended/signal/smoke/signal_test_035.cpp b/testsuites/unittest/extended/signal/smoke/signal_test_035.cpp
index f07e329bf24a40d42db4a57009a2c2b9f6185ba0..231b82c0b4de881522d3a912a1a377fe0145daef 100644
--- a/testsuites/unittest/extended/signal/smoke/signal_test_035.cpp
+++ b/testsuites/unittest/extended/signal/smoke/signal_test_035.cpp
@@ -32,16 +32,16 @@
 #include "signal.h"
 
 static int g_sigCount = 0;
+
 static void SigPrint(int sig)
 {
     (void)sig;
     g_sigCount++;
 }
 
-static int TestCase()
+static int TestCase(void)
 {
     int sig = 100;
-    int count = 0;
     int retValue, status;
     void (*ret)(int);
 
diff --git a/testsuites/unittest/libc/io/full/IO_test_epoll_001.cpp b/testsuites/unittest/libc/io/full/IO_test_epoll_001.cpp
index ecdca93a644906b83e712d53ec01547bf2c9f531..70e256857d0694aed65d7ffe1ae6d50a3e5caaae 100644
--- a/testsuites/unittest/libc/io/full/IO_test_epoll_001.cpp
+++ b/testsuites/unittest/libc/io/full/IO_test_epoll_001.cpp
@@ -43,12 +43,9 @@ static UINT32 testcase(VOID)
     int retval;
     pid_t pid;
     int pipeFd[2]; /* 2, pipe id num */
-    char buffer[40]; /* 40, buffer size */
-    int i = 0;
     int status;
 
     int epFd;
-    sigset_t mask;
     struct epoll_event ev;
     struct epoll_event evWait[2]; /* 2, evs num */
 
diff --git a/testsuites/unittest/libc/io/full/IO_test_epoll_002.cpp b/testsuites/unittest/libc/io/full/IO_test_epoll_002.cpp
index 8b54bdcd82afe5fb06c53db607907f853b6134f1..94781d1934f0588e2ba5f274afd9aaeff2c0c4da 100644
--- a/testsuites/unittest/libc/io/full/IO_test_epoll_002.cpp
+++ b/testsuites/unittest/libc/io/full/IO_test_epoll_002.cpp
@@ -49,8 +49,6 @@ static UINT32 testcase(VOID)
     int retval;
     pid_t pid;
     int pipeFd[2]; /* 2, pipe id num */
-    char buffer[40]; /* 40, buffer size */
-    int i = 0;
     int status;
 
     int epFd;
diff --git a/testsuites/unittest/libc/io/full/IO_test_pselect_001.cpp b/testsuites/unittest/libc/io/full/IO_test_pselect_001.cpp
index d6cfa95d4a2d451e8ff47831c99b0492aa8cb5ce..c065fdb457faf512690bf70936490a5df926386a 100644
--- a/testsuites/unittest/libc/io/full/IO_test_pselect_001.cpp
+++ b/testsuites/unittest/libc/io/full/IO_test_pselect_001.cpp
@@ -68,8 +68,6 @@ static UINT32 testcase(VOID)
     int retval;
     pid_t pid;
     int pipeFd[2]; /* 2, pipe id num */
-    char buffer[40]; /* 40, buffer size */
-    int i = 0;
     int status;
 
     sigset_t mask;
diff --git a/testsuites/unittest/libc/io/full/IO_test_pselect_002.cpp b/testsuites/unittest/libc/io/full/IO_test_pselect_002.cpp
index a57c316d70330e410e6c7fa4ea65c308276539e1..62721fbe3121bfe5156e2052d43d7eb81f8376db 100644
--- a/testsuites/unittest/libc/io/full/IO_test_pselect_002.cpp
+++ b/testsuites/unittest/libc/io/full/IO_test_pselect_002.cpp
@@ -49,9 +49,6 @@ static UINT32 testcase(VOID)
     int retval;
     pid_t pid;
     int pipeFd[2]; /* 2, pipe id num */
-    char buffer[40]; /* 40, buffer size */
-
-    int i = 0;
     int status;
 
     void (*retSig)(int);
diff --git a/testsuites/unittest/libc/io/full/It_stdio_putwc_001.cpp b/testsuites/unittest/libc/io/full/It_stdio_putwc_001.cpp
index a36673857e851f8bdeb9a37e8c02c3b8b76acb88..330f00d0a9ba7cfab186d9b1c937d295702ad33e 100644
--- a/testsuites/unittest/libc/io/full/It_stdio_putwc_001.cpp
+++ b/testsuites/unittest/libc/io/full/It_stdio_putwc_001.cpp
@@ -36,7 +36,7 @@ static UINT32 Testcase(VOID)
     wchar_t srcWc = L'H';
     int tarWc, nRet;
     long nPos;
-    int nType, i;
+    int nType;
     FILE *putwcFile = NULL;
     char pathname[50];                   // 50, pathname size
     strncpy(pathname, g_ioTestPath, 50); // 50, pathname size
diff --git a/testsuites/unittest/libc/io/full/It_stdlib_poll_003.cpp b/testsuites/unittest/libc/io/full/It_stdlib_poll_003.cpp
index d1a99db88f3f539c166c806d8489ffa52c3161b5..f0a883289f5db87f647ebf4000514184f5c5ee2e 100644
--- a/testsuites/unittest/libc/io/full/It_stdlib_poll_003.cpp
+++ b/testsuites/unittest/libc/io/full/It_stdlib_poll_003.cpp
@@ -40,7 +40,7 @@ struct PollParam {
 static UINT32 Testcase(VOID)
 {
     const int TEST_STR_LEN = 12;
-    int pipeFd[2], ret, err; // 2, pipe return 2 file descirpter
+    int pipeFd[2], ret; // 2, pipe return 2 file descirpter
     struct pollfd pollFd;
     struct PollParam pollParam[4] = { /* nfds timeout ret     err */
         {    0,   100,  -1, EINVAL},
diff --git a/testsuites/unittest/libc/io/smoke/IO_test_013.cpp b/testsuites/unittest/libc/io/smoke/IO_test_013.cpp
index 9b2763c48cd5a6acc5db14d7e323c8e37c2117e0..201bf6df1e6085ba3f01e3bbcd7735ac884435cf 100644
--- a/testsuites/unittest/libc/io/smoke/IO_test_013.cpp
+++ b/testsuites/unittest/libc/io/smoke/IO_test_013.cpp
@@ -32,7 +32,7 @@
 
 static UINT32 Testcase(VOID)
 {
-    INT32 val, ret, result;
+    INT32 ret;
     wchar_t buf[200];
     wchar_t *str = L"helloworld";
 
diff --git a/testsuites/unittest/libc/misc/smoke/misc_test_014.cpp b/testsuites/unittest/libc/misc/smoke/misc_test_014.cpp
index 1dffbe51393ecc52d20a0038c2116ddc4b471385..5189f306919246055d2afe1a6f06d1ac56f8bc85 100644
--- a/testsuites/unittest/libc/misc/smoke/misc_test_014.cpp
+++ b/testsuites/unittest/libc/misc/smoke/misc_test_014.cpp
@@ -34,7 +34,6 @@ static UINT32 TestCase(VOID)
 {
     char *name1 = nullptr;
     char name2[100] = { 0 };
-    char name3[100] = "hello";
     int ret;
 
     name1 = tmpnam(NULL);
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_020.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_020.cpp
index e24f1a8de1da09070fe4a191291876dd7f7ebd23..36665b941d3c8419493c7bec9dd5d8b979601e0c 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_020.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_020.cpp
@@ -35,8 +35,6 @@ static UINT32 Testcase(VOID)
     INT32 ret;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     mqd_t mqueue;
-    struct sigevent ev;
-    struct sigaction act;
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq020_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_032.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_032.cpp
index 9feb13998772d5f665b5271fef179224e35ad1cb..2387e11b5fb08e7adcf8ec0b5878dc66bb62b84b 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_032.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_032.cpp
@@ -35,7 +35,6 @@ static UINT32 Testcase(VOID)
     INT32 ret;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     mqd_t mqueue;
-    struct sigevent se;
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq032_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_040.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_040.cpp
index 4442ff61eb5d2ae40e78bda3b171475882e7d767..a58629d4e567c08eaa5c6b874db4f52e91f18bc8 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_040.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_040.cpp
@@ -56,7 +56,7 @@ EXIT:
 
 static VOID *PthreadF02(VOID *argument)
 {
-    INT32 j, ret;
+    INT32 ret;
 
     CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = "";
 
@@ -83,8 +83,6 @@ static UINT32 Testcase(VOID)
 {
     pthread_t newTh1, newTh2;
     UINT32 ret;
-    CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = "";
-    const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     struct mq_attr attr = { 0 };
     pthread_attr_t attr1;
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_046.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_046.cpp
index 90aacd21e19eb2de7cec77ecbf5f8405aa609f84..04b30ee865bc493655fe3162857e53abd46cda5f 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_046.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_046.cpp
@@ -35,7 +35,7 @@ static UINT32 Testcase(VOID)
     CHAR qname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     mqd_t queue;
-    INT32 unresolved = 0, failure = 0, ret = 0;
+    INT32 ret = 0;
 
     snprintf(qname, MQUEUE_STANDARD_NAME_LENGTH, "/mq046-1_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_056.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_056.cpp
index 0d8eaf1d1b83c5c7750561b3685cc1ce7ecae51b..ea2bf63b8a8911053a052b322a82d3bc7b8c340b 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_056.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_056.cpp
@@ -35,7 +35,7 @@ static UINT32 Testcase(VOID)
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH], msgrv[MQUEUE_STANDARD_NAME_LENGTH];
     mqd_t mqdes;
     struct mq_attr attr = { 0 };
-    INT32 unresolved = 0, failure = 0, ret = 0;
+    INT32 failure = 0, ret = 0;
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq056-1-%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_058.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_058.cpp
index cd0bb9ae5cfb65261a59aec1961f202ab8436560..bd90d7b06e0dbdbab1326f665b75bd86024b51f1 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_058.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_058.cpp
@@ -36,7 +36,7 @@ static UINT32 Testcase(VOID)
     mqd_t mqdes;
     CHAR msgrv[MQUEUE_STANDARD_NAME_LENGTH];
     struct mq_attr attr = { 0 };
-    INT32 unresolved = 0, failure = 0, ret = 0;
+    INT32 ret = 0;
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq058-2-%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_061.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_061.cpp
index 1fe6064ddd7a08910984e55f657d9687ecba6235..59190079ebcb37427062333ab8c1d1a336b16303 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_061.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_061.cpp
@@ -35,7 +35,6 @@ static UINT32 Testcase(VOID)
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     mqd_t mqdes;
     struct mq_attr mqstat;
-    INT32 unresolved = 0;
     INT32 failure = 0, ret = 0;
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq061-1_%d", LosCurTaskIDGet());
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_063.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_063.cpp
index 57f77d7b029f13c75bf5c1e6ee472587feb9625a..fa8166185aa8990042d69c3282feebf10fb0eff0 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_063.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_063.cpp
@@ -35,7 +35,6 @@ static UINT32 Testcase(VOID)
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     mqd_t mqdes;
     struct mq_attr mqstat, nmqstat;
-    INT32 unresolved = 0;
     INT32 failure = 0, ret = 0;
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq063-1_%d", LosCurTaskIDGet());
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_066.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_066.cpp
index 03b127e9812654be13bfdb0e01ed4c1ee01fcd8a..c505818ebb4e4c69e6ea6afc8f72bc2b252cc060 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_066.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_066.cpp
@@ -36,7 +36,6 @@ static UINT32 Testcase(VOID)
     mqd_t mqdes;
     struct mq_attr mqstat = { 0 };
     struct mq_attr nmqstat = { 0 };
-    INT32 unresolved = 0;
     INT32 failure = 0, ret = 0;
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq066-1_%d", LosCurTaskIDGet());
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_080.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_080.cpp
index 74e7251568a840b0fa251570d2f98a8997487891..8c46179d4b85b9109dd007f1840b0c32fed9c13d 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_080.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_080.cpp
@@ -37,8 +37,7 @@ static UINT32 Testcase(VOID)
     struct timespec ts;
     struct mq_attr attr = { 0 };
     mqd_t queue;
-    INT32 unresolved = 0, failure = 0, i, maxreached = 0, ret = 0;
-    unsigned pri;
+    INT32 unresolved = 0, i, maxreached = 0, ret = 0;
 
     snprintf(qname, MQUEUE_STANDARD_NAME_LENGTH, "/mq080-1_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_081.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_081.cpp
index 3ac51ae4fa18746ebca6d5a035d42854bf7c319c..742f30ccdadff4a756a3b9fac7d849c2ea988cef 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_081.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_081.cpp
@@ -37,8 +37,7 @@ static UINT32 Testcase(VOID)
     struct timespec ts;
     mqd_t queue;
     struct mq_attr attr = { 0 };
-    INT32 unresolved = 0, ret;
-    unsigned pri;
+    INT32 ret;
 
     snprintf(qname, MQUEUE_STANDARD_NAME_LENGTH, "/mq081-1_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_083.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_083.cpp
index 55b26c13f79125308c5ee008c1cd6745e5279d16..9f4ecb23eaba43edc571734d0b303a7596e54075 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_083.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_083.cpp
@@ -37,7 +37,7 @@ static UINT32 Testcase(VOID)
     struct timespec ts;
     struct mq_attr attr = { 0 };
     mqd_t queue;
-    INT32 unresolved = 0, failure = 0, i, maxreached = 0, ret = 0;
+    INT32 i, ret = 0;
 
     snprintf(qname, MQUEUE_STANDARD_NAME_LENGTH, "/mq083-1_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_084.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_084.cpp
index 02b6fc18cbe2addf73a54c2afce134755d2908e8..f4b7dd5049c6e02e71c22fe95682db41c8841535 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_084.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_084.cpp
@@ -36,7 +36,7 @@ static UINT32 Testcase(VOID)
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     struct timespec ts;
     mqd_t queue;
-    INT32 unresolved = 0, failure = 0, ret = 0;
+    INT32 ret = 0;
 
     snprintf(qname, MQUEUE_STANDARD_NAME_LENGTH, "/mq084-1_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_093.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_093.cpp
index 4e8596f40a079633244fa95b7636fb906147b85d..ff1249ca04ffaf532da779fe184581ec440c6cd2 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_093.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_093.cpp
@@ -36,9 +36,6 @@ static UINT32 Testcase(VOID)
     CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     struct timespec ts;
     struct mq_attr attr = { 0 };
-    mqd_t mqueue;
-    struct sigaction act;
-    time_t currsec;
 
     snprintf(g_gqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq093_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_108.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_108.cpp
index 898c252c144c46ee5bf6d671072a910d0a62603c..236d26f94ec5a947ea078423658d52d259345ce5 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_108.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_108.cpp
@@ -36,7 +36,7 @@ static UINT32 Testcase(VOID)
     mqd_t mqdes;
     struct timespec ts;
     struct mq_attr attr = { 0 };
-    INT32 unresolved = 0, failure = 0, ret = 0;
+    INT32 ret = 0;
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq108-1_%d", LosCurTaskIDGet());
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_119.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_119.cpp
index d93f11d724bd35df84a00ef9f1a6ee0c6cee9f92..b9155f02ee6d9802aaecd4d07b2102011d3c5fe0 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_119.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_119.cpp
@@ -63,7 +63,6 @@ EXIT:
 static VOID *PthreadF02(VOID *arg)
 {
     INT32 ret;
-    UINT32 uret;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     pthread_t pthread1;
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_134.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_134.cpp
index 1293dce174ec730844da394072e01631154c73c1..6134a8c4ff6ef2ff4573bc5eaa5e34c939dbf143 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_134.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_134.cpp
@@ -33,7 +33,6 @@
 static UINT32 Testcase(VOID)
 {
     INT32 ret;
-    UINTPTR temp;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     mqd_t mqueue;
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_136.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_136.cpp
index 83f0f82f7d55c058a38d024e70bf48e6bd69a247..7a427b391e5ee0927e42fac05402f99801946e26 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_136.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_136.cpp
@@ -38,9 +38,6 @@ static UINT32 Testcase(VOID)
     mqd_t queueID[LOSCFG_BASE_IPC_QUEUE_CONFIG + 1];
     CHAR qName[LOSCFG_BASE_IPC_QUEUE_CONFIG + 1][MQUEUE_STANDARD_NAME_LENGTH];
 
-    const CHAR *msgPtr = MQUEUE_SEND_STRING_TEST;
-    CHAR msgRcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
-
     struct mq_attr msgAttr = { 0 };
     msgAttr.mq_msgsize = 20; // 20, mqueue message size.
     msgAttr.mq_maxmsg = 20; // 20, mqueue message size.
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_144.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_144.cpp
index c9d07ef412a96515d3d06b78b3901ebc94e31f11..11096a9bfe659a3647314d88af530df1d9cf4543 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_144.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_144.cpp
@@ -88,7 +88,7 @@ static UINT32 Testcase(VOID)
     INT32 ret;
     UINT32 uret;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
-    struct mq_attr mqstat, attr;
+    struct mq_attr mqstat;
     pthread_attr_t attr1;
     pthread_t newTh, newTh2;
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_151.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_151.cpp
index 4874cdf88fda46da8ed65c174cb32d9c4862a274..f57663f075dc660823596d1eb40c94353d708d1c 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_151.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_151.cpp
@@ -33,7 +33,6 @@
 static UINT32 Testcase(VOID)
 {
     INT32 ret;
-    const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     mqd_t mqueue;
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_160.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_160.cpp
index c451568ba27dd603ccc2dca10c0f566f51991a81..b7b9dd9178bf73b02153782283ed9da774b4f21e 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_160.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_160.cpp
@@ -32,7 +32,7 @@
 
 static VOID *PthreadF01(VOID *arg)
 {
-    INT32 i, ret;
+    INT32 i;
     INT32 count = MQUEUE_MAX_NUM_TEST;
     struct mq_attr attr = { 0 };
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_161.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_161.cpp
index ca6949a7e8600381ad62f543a90da1d4571b525e..bcff843e94aaf9484e1d77afc13361572701d82b 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_161.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_161.cpp
@@ -34,7 +34,7 @@ static UINT32 g_index = 0;
 
 static VOID *PthreadF01(VOID *arg)
 {
-    INT32 i, ret;
+    INT32 i;
     UINT32 uret = 0;
     INT32 count = (INT32)arg;
     struct mq_attr attr = { 0 };
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_168.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_168.cpp
index 48f215f3d49da44382f442b280a10adf0eb8a68e..a0f7cebb4680d3d8022ed27df6e05a7b25836254 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_168.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_168.cpp
@@ -33,7 +33,6 @@
 
 static UINT32 Testcase(VOID)
 {
-    UINT32 pri;
     INT32 ret;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_169.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_169.cpp
index d161ab4f461e40ed3ed4a8b31a1cd9b2249525e6..527149c860ff5ec441d0fe6a4447f5a7a6de8e18 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_169.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_169.cpp
@@ -33,7 +33,6 @@
 static UINT32 Testcase(VOID)
 {
     INT32 ret;
-    UINT32 pri;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_173.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_173.cpp
index d87588d4180d5d19459c5e2f8a33563d748e4e35..af737173c6b780c46a213050b12828296ffd231c 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_173.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_173.cpp
@@ -33,10 +33,7 @@
 static UINT32 Testcase(VOID)
 {
     INT32 ret;
-    UINT32 rvprio;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
-    CHAR msgrcd1[MQUEUE_STANDARD_NAME_LENGTH] = {0};
-    CHAR msgrcd2[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     const CHAR *msgptr1 = "test message 1";
     const CHAR *msgptr2 = "test message 2";
     mqd_t mqueue;
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_175.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_175.cpp
index 0fa63e43ae941e8ba7a67e7415957600b548da10..23171491d9ba23ddbd8f75f96231b41f7466fd9c 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_175.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_175.cpp
@@ -34,7 +34,6 @@ static UINT32 Testcase(VOID)
 {
     INT32 ret;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
-    CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     struct timespec ts;
     struct mq_attr attr = { 0 };
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_176.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_176.cpp
index fda61054dfaeb63e8d6bb22781e676f81a939bee..1364c647c2040dd0c8457f8fbae80293f3ac7093 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_176.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_176.cpp
@@ -33,9 +33,7 @@
 static UINT32 Testcase(VOID)
 {
     INT32 ret;
-    UINT32 pri;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
-    CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     struct timespec ts;
     mqd_t mqueue;
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_177.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_177.cpp
index 574c1bc106dbe62e9bc47274dd4fc4c1163cc2ec..1cdaa8fb677465457f7d1adc0f8af5d71069d157 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_177.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_177.cpp
@@ -33,7 +33,6 @@
 static UINT32 Testcase(VOID)
 {
     INT32 ret;
-    UINT32 pri;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_201.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_201.cpp
index 2ecd50380e89a625e39835c015e00600a0834f90..e2a0f2481389ba40a5c3d3cbe42f5bab8dccdbfc 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_201.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_201.cpp
@@ -36,7 +36,6 @@ static UINT32 Testcase(VOID)
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH + 1] = {0};
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
-    pthread_t newTh;
     struct mq_attr attr = { 0 };
     struct timespec ts = { 0 };
     mqd_t mqueue;
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_202.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_202.cpp
index 71e2430965755890a1a0c1cc35b81b0236138871..959f2a0d80e0cddf01e6860fbb6e18503163a02a 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_202.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_202.cpp
@@ -36,7 +36,6 @@ static UINT32 Testcase(VOID)
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     mqd_t mqueue;
-    struct timespec ts;
     struct mq_attr attr = { 0 };
 
     snprintf(mqname, MQUEUE_STANDARD_NAME_LENGTH, "/mq202_%d", LosCurTaskIDGet());
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_203.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_203.cpp
index 09e36c39d04fb90ae3b64e5018cd68cde409f1e1..429d981bc4e3604857231eb60f66c2522f788b75 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_203.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_203.cpp
@@ -35,8 +35,7 @@ static UINT32 Testcase(VOID)
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     CHAR msgrv1[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     struct mq_attr attr = { 0 };
-    INT32 ret = MQUEUE_NO_ERROR, i;
-    pthread_t pthread1, pthread2;
+    INT32 ret = MQUEUE_NO_ERROR;
     mqd_t mqueue1, mqueue2;
     struct timespec ts;
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_204.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_204.cpp
index 1f24ce2cf2b32e3a5b7f5735f4514662cba234e3..3da07a023d9f6c1cbc48e17d0df41db0c0c3a68e 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_204.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_204.cpp
@@ -40,7 +40,6 @@ static void *PthreadF01(void *arg)
     while (g_itSync != 1) {
     }
 
-    struct mqarray *ptrMqcb = (struct mqarray *)NULL;
     g_mqueue1 = mq_open(g_mqname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR, &g_attr);
     LosTaskDelay(2); // 2, Set delay time.
     if (g_mqueue1 != -1) {
@@ -54,7 +53,6 @@ static void *PthreadF02(void *arg)
 {
     g_itSync = 1;
 
-    struct mqarray *ptrMqcb = (struct mqarray *)NULL;
     g_mqueue2 = mq_open(g_mqname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR, &g_attr);
     LosTaskDelay(2); // 2, Set delay time.
     if (g_mqueue2 != -1) {
@@ -70,7 +68,7 @@ EXIT:
 
 STATIC UINT32 Testcase(VOID)
 {
-    INT32 ret = MQUEUE_NO_ERROR, i;
+    INT32 ret = MQUEUE_NO_ERROR;
     pthread_t pthread1, pthread2;
     pthread_attr_t attr1, attr2;
 
diff --git a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_209.cpp b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_209.cpp
index 8bfe39091d1161efbcab978f7b4c7e52bd6391f7..f02dfbec42f48993336c5480b5f70446a178638d 100644
--- a/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_209.cpp
+++ b/testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_209.cpp
@@ -72,7 +72,6 @@ static void Child(void)
     struct sigevent sigev = {0};
     pthread_t pthread1;
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
-    CHAR msgrcd[MQUEUE_STANDARD_NAME_LENGTH] = {0};
     struct mq_attr attr = {0};
 
     attr.mq_msgsize = MQUEUE_STANDARD_NAME_LENGTH;
diff --git a/testsuites/unittest/libc/time/clock/full/clock_test_002.cpp b/testsuites/unittest/libc/time/clock/full/clock_test_002.cpp
index f951d87871ad5fb8827a589fc27e3c98d0c45031..5bff0d8ec5428160ee0f7d7a7fa8852d07972423 100644
--- a/testsuites/unittest/libc/time/clock/full/clock_test_002.cpp
+++ b/testsuites/unittest/libc/time/clock/full/clock_test_002.cpp
@@ -56,7 +56,6 @@ static int ClockTest(void)
     pthread_t thread;
     clockid_t clockid;
     int ret;
-    struct timespec ts;
 
     ret = pthread_create(&thread, NULL, ThreadFuncTest, 0);
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
diff --git a/testsuites/unittest/libc/time/clock/full/clock_test_003.cpp b/testsuites/unittest/libc/time/clock/full/clock_test_003.cpp
index d37ae98bdad8c1b2f41eb26135b8180f4469d0a7..71db84a1ed74d60c9ee82c5417a73a7025881320 100644
--- a/testsuites/unittest/libc/time/clock/full/clock_test_003.cpp
+++ b/testsuites/unittest/libc/time/clock/full/clock_test_003.cpp
@@ -36,7 +36,6 @@ static int ClockTest(void)
     struct timespec ts;
     int ret;
     pid_t pid = 0;
-    int passflag = 0;
 
     /* get kernel process 1 clockid */
     pid = 1;
diff --git a/testsuites/unittest/libc/time/clock/full/clock_test_004.cpp b/testsuites/unittest/libc/time/clock/full/clock_test_004.cpp
index 5add0e142d74100d55485c6314e5adaab0230f49..894cceb9856e5454357d2a74b3a4f17b49f334c3 100644
--- a/testsuites/unittest/libc/time/clock/full/clock_test_004.cpp
+++ b/testsuites/unittest/libc/time/clock/full/clock_test_004.cpp
@@ -32,8 +32,6 @@
 
 static int ClockTest(void)
 {
-    pthread_t thread;
-    clockid_t clockid;
     int ret;
     struct timespec ts;
 
diff --git a/testsuites/unittest/libc/time/clock/full/clock_test_005.cpp b/testsuites/unittest/libc/time/clock/full/clock_test_005.cpp
index 8db361ac68a32f7083735fa66ba610b14bd4eb53..249cb5b43a34dd6e161832fc0a1b55b12a3351b9 100644
--- a/testsuites/unittest/libc/time/clock/full/clock_test_005.cpp
+++ b/testsuites/unittest/libc/time/clock/full/clock_test_005.cpp
@@ -33,7 +33,6 @@
 static int ClockTest(void)
 {
     clockid_t clockid;
-    struct timespec ts;
     int ret;
     pid_t pid = 0;
 
diff --git a/testsuites/unittest/libc/time/timer/smoke/timer_test_005.cpp b/testsuites/unittest/libc/time/timer/smoke/timer_test_005.cpp
index 4c739f748495810737179f768a82f49669cf0a87..5159a6e954e8b8da079469b8c6f7692e801aae75 100644
--- a/testsuites/unittest/libc/time/timer/smoke/timer_test_005.cpp
+++ b/testsuites/unittest/libc/time/timer/smoke/timer_test_005.cpp
@@ -39,7 +39,6 @@
 
 static int g_sigHdlCnt01;
 static int g_sigHdlCnt02;
-static int g_sigHdlCnt03;
 
 static void TempSigHandler(union sigval v)
 {
@@ -59,11 +58,10 @@ static void TempSigHandler02(void)
 
 static int TimerTest(void)
 {
-    timer_t timerid01, timerid02, timerid03;
+    timer_t timerid01, timerid02;
     struct sigevent sev;
     struct itimerspec its;
     int ret;
-    int i;
 
     (void)memset(&sev, 0, sizeof(struct sigevent));
     sev.sigev_notify = SIGEV_THREAD;
diff --git a/testsuites/unittest/libc/util/smoke/util_test_001.cpp b/testsuites/unittest/libc/util/smoke/util_test_001.cpp
index 06a544510ca6ec21d49e436850df62384a9a4370..f6dc71cfbbceecb3bd970899d4d9abd6f7e1f74d 100644
--- a/testsuites/unittest/libc/util/smoke/util_test_001.cpp
+++ b/testsuites/unittest/libc/util/smoke/util_test_001.cpp
@@ -44,7 +44,6 @@ static UINT32 TestCase(VOID)
     INT32 ret, i;
     INT32 argc = ARGC_NUM;
     CHAR *argv[] = {"test", "-b", "-a", "-c", NULL};
-    CHAR *ptr = NULL;
     CHAR * const shortOptions = "abc";
 
     for (i = 0; (ret = getopt_long(argc, argv, shortOptions, g_longOptions, NULL)) != -1; i++) {
diff --git a/testsuites/unittest/libc/util/smoke/util_test_002.cpp b/testsuites/unittest/libc/util/smoke/util_test_002.cpp
index fee8059b4696ca77e5a8e5d69850decbac176d68..9aa1ff1bdab8460c50d4af2a668262406e7253bd 100644
--- a/testsuites/unittest/libc/util/smoke/util_test_002.cpp
+++ b/testsuites/unittest/libc/util/smoke/util_test_002.cpp
@@ -44,7 +44,6 @@ static UINT32 TestCase(VOID)
     INT32 ret, i;
     INT32 argc = ARGC_NUM;
     CHAR *argv[] = {"test", "-b", "-a", "-c", NULL};
-    CHAR *ptr = NULL;
     CHAR * const shortOptions = "abc";
 
     for (i = 0; (ret = getopt_long_only(argc, argv, shortOptions, g_longOptions, NULL)) != -1; i++) {
diff --git a/testsuites/unittest/net/resolv/smoke/net_resolv_test_002.cpp b/testsuites/unittest/net/resolv/smoke/net_resolv_test_002.cpp
index 4e5701998143fbe31ca32bef07b3a5c2b82c05d1..5ecbeddcb474a8ff6202b510cfbd31c175fda98e 100644
--- a/testsuites/unittest/net/resolv/smoke/net_resolv_test_002.cpp
+++ b/testsuites/unittest/net/resolv/smoke/net_resolv_test_002.cpp
@@ -40,7 +40,7 @@ static int EtherAtonTest(void)
 
     ICUNIT_ASSERT_EQUAL(eaddr, NULL, -1);
 
-    char mac_addr[buffer_size], *tmp = mac_addr;
+    char mac_addr[buffer_size];
     int r[ETH_ALEN];
     srand(time(NULL));
     for (int i = 0; i < ETH_ALEN; i++) {
diff --git a/testsuites/unittest/net/resolv/smoke/net_resolv_test_003.cpp b/testsuites/unittest/net/resolv/smoke/net_resolv_test_003.cpp
index 85929a8bde61dc32285f1b0826c8ff3c0a37a88a..523a85b63efd32f3ddd6214b6fc2e1588e094eee 100644
--- a/testsuites/unittest/net/resolv/smoke/net_resolv_test_003.cpp
+++ b/testsuites/unittest/net/resolv/smoke/net_resolv_test_003.cpp
@@ -41,7 +41,7 @@ static int EtherAtonrTest(void)
 
     ICUNIT_ASSERT_EQUAL(eaddr, NULL, -1);
 
-    char mac_addr[buffer_size], *tmp = mac_addr;
+    char mac_addr[buffer_size];
     int r[ETH_ALEN];
     srand(time(NULL));
     for (int i = 0; i < ETH_ALEN; i++) {
diff --git a/testsuites/unittest/net/socket/smoke/net_socket_test_002.cpp b/testsuites/unittest/net/socket/smoke/net_socket_test_002.cpp
index 20d2193c8a15896f9f375916e4a49644e1706b6e..c7bf060a73dea956a65cd7ce858219c102b613da 100644
--- a/testsuites/unittest/net/socket/smoke/net_socket_test_002.cpp
+++ b/testsuites/unittest/net/socket/smoke/net_socket_test_002.cpp
@@ -53,7 +53,7 @@ static int UdpTest(void)
     struct sockaddr_in srvAddr = { 0 };
     struct sockaddr_in clnAddr = { 0 };
     socklen_t clnAddrLen = sizeof(clnAddr);
-    int ret = 0, i = 0;
+    int ret = 0;
     struct msghdr msg = { 0 };
     struct iovec iov[2] = { };
 
diff --git a/testsuites/unittest/net/socket/smoke/net_socket_test_003.cpp b/testsuites/unittest/net/socket/smoke/net_socket_test_003.cpp
index 925002140819471b28721677d8d594d9276fcb0c..fb71ea1910cf5b5e0792d0c58247467e992064cf 100644
--- a/testsuites/unittest/net/socket/smoke/net_socket_test_003.cpp
+++ b/testsuites/unittest/net/socket/smoke/net_socket_test_003.cpp
@@ -58,7 +58,7 @@ static int SampleTcpServer()
     socklen_t clnAddrLen = sizeof(clnAddr);
     struct msghdr msg = { 0 };
     struct iovec iov[2] = { };
-    int ret = 0, i = 0;
+    int ret = 0;
 
     /* tcp server */
     lsfd = socket(AF_INET, SOCK_STREAM, 0);
@@ -158,8 +158,7 @@ static int SampleTcpClient()
     int sfd = -1;
     struct sockaddr_in srvAddr = { 0 };
     struct sockaddr_in clnAddr = { 0 };
-    socklen_t clnAddrLen = sizeof(clnAddr);
-    int ret = 0, i = 0;
+    int ret = 0;
     struct msghdr msg = { 0 };
     struct iovec iov[2] = { };
     struct sockaddr addr;
diff --git a/testsuites/unittest/process/basic/process/full/process_test_007.cpp b/testsuites/unittest/process/basic/process/full/process_test_007.cpp
index 58587ca98f5d5d49509aaeda7696e75186ed2d02..05e20e231f20c6ffa1af3296d0e6a8d9d67c9c78 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_007.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_007.cpp
@@ -40,12 +40,8 @@ static void *ThreadFunc2(void *arg)
 static int ProcessTest001(void)
 {
     int ret;
-    int status;
-    int pid;
     int data;
-    int pri;
-    pthread_t newPthread, newPthread1;
-    int count = 4;
+    pthread_t newPthread;
     int currProcessPri = getpriority(PRIO_PROCESS, getpid());
     ICUNIT_ASSERT_WITHIN_EQUAL(currProcessPri, 0, 31, currProcessPri); // 31, assert that function Result is equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/full/process_test_036.cpp b/testsuites/unittest/process/basic/process/full/process_test_036.cpp
index 1d8efc7628a6aa1b5bbf2aa0cb7954a554a54fca..d4ef6b40e4d8e875027a41ab250621aeebedc5ef 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_036.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_036.cpp
@@ -119,8 +119,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
-    int currGid = getpgrp();
+    pid_t pid;
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/full/process_test_037.cpp b/testsuites/unittest/process/basic/process/full/process_test_037.cpp
index 29f8c6a49d248fb04c67e88d1226fe043acb280e..cd63bb2b99ee3bd0f52939b6c4fe7f6440099959 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_037.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_037.cpp
@@ -117,8 +117,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
-    int currGid = getpgrp();
+    pid_t pid;
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/full/process_test_040.cpp b/testsuites/unittest/process/basic/process/full/process_test_040.cpp
index cadf457c122d7776064a9a1a3982753942e11661..6f9c8530a544a4e1841c4ee5e0584d0984583cb9 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_040.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_040.cpp
@@ -34,11 +34,9 @@ static int GroupProcess(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
     int count = 1000;
-    int waitProcess = 0;
     int testPid;
-    bool thread = false;
     int processCount = 0;
 
     for (int i = 0; i < count; i++) {
@@ -81,8 +79,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
-    int currGid = getpgrp();
+    pid_t pid;
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/full/process_test_041.cpp b/testsuites/unittest/process/basic/process/full/process_test_041.cpp
index d2356961583bdb479639145083aa71651ba1301e..a3fff21dcef09dbe8c2e0eae7a6cfabee3c64328 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_041.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_041.cpp
@@ -41,13 +41,11 @@ static int GroupProcess(void)
     int testPid;
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
     int count = 500;
-    int waitProcess = 0;
     pthread_attr_t a = { 0 };
     pthread_t pthread[1000] = { 0 };
     struct sched_param param = { 0 };
-    bool thread = false;
 
     int processCount = 0;
 
@@ -105,7 +103,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/full/process_test_042.cpp b/testsuites/unittest/process/basic/process/full/process_test_042.cpp
index 188cdf79d920be42ff56a4fb0959052de3fd2678..23f370bc315299f3a9c0ccc5b2664e351ffb59a6 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_042.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_042.cpp
@@ -31,7 +31,6 @@
 #include "it_test_process.h"
 #include "sys/shm.h"
 
-static const int TEST_THREAD = 40;
 static const int TEST_LOOP = 3000;
 
 static void Child2(int shmid)
@@ -72,7 +71,6 @@ static void Child1(int shmid)
 
 static int GroupProcess(void)
 {
-    int testPid;
     int ret;
     int policy = 0;
     struct sched_param param = { 0 };
@@ -148,7 +146,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
 
     int temp = GetCpuCount();
     if (temp != 1) {
diff --git a/testsuites/unittest/process/basic/process/full/process_test_055.cpp b/testsuites/unittest/process/basic/process/full/process_test_055.cpp
index 30ce7ed182f7c5fc799b5d21bfee7297d01fdf97..c661bbbd2666e6c9965e5df3da0364f94f16d3e2 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_055.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_055.cpp
@@ -56,7 +56,6 @@ EXIT:
 static int TestCase(void)
 {
     pid_t pid;
-    int status;
     int ret;
     pid = fork();
 
diff --git a/testsuites/unittest/process/basic/process/full/process_test_060.cpp b/testsuites/unittest/process/basic/process/full/process_test_060.cpp
index 6f96f65c077478989b0d7e6cfcd54a62fb207ab0..0ed960c995c207cf2445124f9db88cc6732a4085 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_060.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_060.cpp
@@ -88,9 +88,7 @@ static int TestPrioError(void)
 }
 static int TestCase(void)
 {
-    pid_t pid;
     posix_spawnattr_t attr;
-    int status = 1;
     int ret;
 
     posix_spawnattr_init(&attr);
diff --git a/testsuites/unittest/process/basic/process/full/process_test_063.cpp b/testsuites/unittest/process/basic/process/full/process_test_063.cpp
index d68956531f7a127385d4753391fd91c03df9e6ac..85047bf75368552ae51c3ce00920d8bc3605ca34 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_063.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_063.cpp
@@ -63,7 +63,6 @@ static void GetRandomData(char **buf, int bufSize)
 static int TestCase(VOID)
 {
     int ret;
-    int err;
     pid_t pid;
     char *fileName = NULL;
     char *childFileName = NULL;
diff --git a/testsuites/unittest/process/basic/process/full/process_test_064.cpp b/testsuites/unittest/process/basic/process/full/process_test_064.cpp
index 3b84cbbb1828e20f0974ed6a24cee8a4ab57829a..09dd18911bbc4e23c19434b98de53f42a2856606 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_064.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_064.cpp
@@ -34,7 +34,6 @@
 static const int FILE_NAME_BYTES = 200; // 200, set test name len.
 static const int LONG_FILE_NAME_BYTES = 500; // 500, set test name len.
 static const int RANDOM_MAX = 127; // 127, set random max.
-static const unsigned int INVALID_USER_VADDR = 0x1200000;
 
 static int GetRandomNumber(int max)
 {
@@ -63,10 +62,8 @@ static void GetRandomData(char **buf, int bufSize)
 static int TestCase(VOID)
 {
     int ret;
-    int err;
     pid_t pid;
     char *fileName = NULL;
-    char *childFileName = NULL;
     char **childArgv = NULL;
     char **childEnvp = NULL;
 
diff --git a/testsuites/unittest/process/basic/process/full/process_test_065.cpp b/testsuites/unittest/process/basic/process/full/process_test_065.cpp
index 15f3fd82ee182e7cecfadfbbb74b5cfec9e03f07..864c75869f7b6a1107efe7ec40ec5f5ab79caf2f 100644
--- a/testsuites/unittest/process/basic/process/full/process_test_065.cpp
+++ b/testsuites/unittest/process/basic/process/full/process_test_065.cpp
@@ -86,9 +86,7 @@ static int TestPrioError(void)
 }
 static int TestCase(void)
 {
-    pid_t pid;
     posix_spawnattr_t attr;
-    int status = 1;
     int ret;
 
     posix_spawnattr_init(&attr);
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_001.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_001.cpp
index 2900a1e10d9da966025d9c12889d16e73f1be5a6..af5ceced73d7dd6ef049210e3f5d5c295768f94a 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_001.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_001.cpp
@@ -30,16 +30,14 @@
  */
 
 #include "it_test_process.h"
- 
+
 static const int PROCESS_PRIORITY_MAX = 10;
 static const int PROCESS_PRIORITY_MIN = 31;
-static const int PROCESS_SCHED_RR_INTERVAL = 20000000;
 
 static int Testcase(VOID)
 {
     int ret;
     struct sched_param param = { 0 };
-    struct timespec ts = { 0 };
     int err;
     ret = sched_getparam(getpid(), NULL);
     err = errno;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_005.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_005.cpp
index 8a94237b4666a66fb182c90446c149f86bfbe83a..cc4de024be3fdbd66e6b42f5c11105d5b2f6fb6c 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_005.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_005.cpp
@@ -120,7 +120,6 @@ static int ProcessTest002(void)
 static int ProcessTest001(int *id)
 {
     int ret;
-    int status;
     int pid;
 
     pid = fork();
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_006.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_006.cpp
index 909c4e7433f5b1f9844a1e87a5530fe86b741794..bbfe94c5ed48e353e9ee14e8bf63c84c0319be15 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_006.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_006.cpp
@@ -49,11 +49,7 @@ static int ProcessTest001(void)
     int status = 0;
     int pid, pid1;
     int data;
-    int pri;
-    pthread_t newPthread, newPthread1;
-    int count = 4;
-    pthread_attr_t a = { 0 };
-    struct sched_param param = { 0 };
+    pthread_t newPthread;
     int currProcessPri = getpriority(PRIO_PROCESS, getpid());
     ICUNIT_ASSERT_WITHIN_EQUAL(currProcessPri, 0, 31, currProcessPri); // 31, assert that function Result is equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_008.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_008.cpp
index c7245658dd1224322f1a359b428b96b3cfd53fa5..405f9ea7a06050b8a8ce823b2e77196e70064531 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_008.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_008.cpp
@@ -46,13 +46,9 @@ static void *ThreadFunc3(void *arg)
 static int ProcessTest001(void)
 {
     int ret;
-    int status;
-    int pid;
     int policy = 0;
     int data;
-    int pri;
-    pthread_t newPthread, newPthread1;
-    int count = 4;
+    pthread_t newPthread;
     pthread_attr_t a = { 0 };
     struct sched_param param = { 0 };
     int currProcessPri = getpriority(PRIO_PROCESS, getpid());
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_009.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_009.cpp
index ac38c08f735ceebab8b530ecab293ece4c1fb606..66155d834b2332513fdaa993a70238542ccec4ea 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_009.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_009.cpp
@@ -41,12 +41,7 @@ static int ProcessTest001(void)
     int ret;
     int status = 0;
     int pid;
-    int data;
-    int pri;
-    pthread_t newPthread, newPthread1;
-    int count = 4;
-    pthread_attr_t a = { 0 };
-    struct sched_param param = { 0 };
+    pthread_t newPthread;
     int currProcessPri = getpriority(PRIO_PROCESS, getpid());
     ICUNIT_ASSERT_WITHIN_EQUAL(currProcessPri, 0, 31, currProcessPri); // 31, assert that function Result is equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_010.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_010.cpp
index d8fc46e552fef53d9ba56f1fa87e09b69b7a63ad..d699db122567382ae226807eacc100d198e7a997 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_010.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_010.cpp
@@ -37,10 +37,8 @@ static void *ThreadFunc2(void *arg) {}
 static int ProcessTest001(void)
 {
     int ret;
-    int status;
-    int pid;
     int data;
-    pthread_t newPthread, newPthread1;
+    pthread_t newPthread;
     int currProcessPri = getpriority(PRIO_PROCESS, getpid());
     ICUNIT_ASSERT_WITHIN_EQUAL(currProcessPri, 0, 31, currProcessPri); // 31, assert currProcessPri equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_011.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_011.cpp
index 2e86789e17973dcd43b88e899983758eacae2e63..9ff5c53308d122625c63f699e93abeed658be093 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_011.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_011.cpp
@@ -74,7 +74,6 @@ EXIT:
 static int TestCase(void)
 {
     int ret;
-    int status = 100;
     pthread_t newPthread;
 
     g_testThreadExit = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_012.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_012.cpp
index ea2041951d93dbb1148061a38e6684a22f5b82de..07eb9443bc95d7254b98cfdb98175ce194a56e80 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_012.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_012.cpp
@@ -105,7 +105,6 @@ EXIT:
 static int TestCase(void)
 {
     int ret;
-    int status = 100;
     pthread_t newPthread;
 
     g_testThreadExit = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_015.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_015.cpp
index 967a68ff08b5a1ee24a29511eb9017d6e1e77bc5..13f904ec67f2e6cad981fd926fc8e0e3f05c5d92 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_015.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_015.cpp
@@ -33,7 +33,6 @@
 static int g_testThreadExit = 0;
 static int g_testExit = 0;
 static int g_waitPid;
-static int g_backPid;
 
 static void *ThreadFunc(void *arg)
 {
@@ -54,7 +53,6 @@ static int ProcessTest(void)
     int status = 100;
     pthread_t newPthread;
     pid_t pid;
-    int count = 0;
     g_testThreadExit = 0;
     g_testExit = 0;
     g_waitPid = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_016.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_016.cpp
index 32394bdfd2d262016568e858a2f1cc653d1d8685..f28df843fc1c8f59404030138e0593a3298abffc 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_016.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_016.cpp
@@ -33,7 +33,6 @@
 static int g_testThreadExit = 0;
 static int g_testExit = 0;
 static int g_waitPid;
-static int g_backPid;
 
 static void *ThreadFunc(void *arg)
 {
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_017.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_017.cpp
index 7519aeccfe25fcb07e596db068b7df13e3559622..676213122939a30978a7eb02f07a9e6999947f06 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_017.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_017.cpp
@@ -33,7 +33,6 @@
 static int g_testThreadExit = 0;
 static int g_testExit = 0;
 static int g_waitPid;
-static int g_backPid;
 
 static void *ThreadFunc(void *arg)
 {
@@ -56,7 +55,6 @@ static int ProcessTest(void)
     int status = 100;
     pthread_t newPthread;
     pid_t pid;
-    int count = 0;
     g_testThreadExit = 0;
     g_testExit = 0;
 
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_018.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_018.cpp
index 8e92d18581dafaac95600512c7a652ded39b8dc6..9d575a1b90a4d2ce1a7cb0b1fb6202387c7d876a 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_018.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_018.cpp
@@ -33,7 +33,6 @@
 static int g_testThreadExit = 0;
 static int g_testExit = 0;
 static int g_waitPid;
-static int g_backPid;
 
 static void *ThreadFunc(void *arg)
 {
@@ -53,7 +52,7 @@ static int ProcessTest(void)
     int ret;
     int status = 100;
     pthread_t newPthread;
-    pid_t pid, pid1, pid2;
+    pid_t pid, pid1;
     int count = 0;
     g_testThreadExit = 0;
     g_testExit = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_019.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_019.cpp
index c51b59d8a648bc9ed42ce268ba2ae3a82803981f..47204706ae8e21844836c2d1420315bc303a9a61 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_019.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_019.cpp
@@ -30,10 +30,7 @@
  */
 #include "it_test_process.h"
 
-static int g_testThreadExit = 0;
-static int g_testExit = 0;
 static int g_waitPid;
-static int g_backPid;
 
 static void *ThreadFunc(void *arg)
 {
@@ -53,7 +50,7 @@ static int ProcessTest(void)
     int ret;
     int status = 100;
     pthread_t newPthread;
-    pid_t pid, pid1, pid2;
+    pid_t pid, pid1;
     int count = 0;
 
     pid = fork();
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_020.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_020.cpp
index 16701c6e346313651e39039ecd34dbdc5ce67826..ab7474e39468aa9e93eb4921e2d0d75c2929a90e 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_020.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_020.cpp
@@ -60,7 +60,7 @@ static int ProcessTest(void)
     int ret;
     int status = 100;
     pthread_t newPthread;
-    pid_t pid, pid1, pid2;
+    pid_t pid, pid1;
     int count = 0;
 
     g_waitPid = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_021.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_021.cpp
index 792996c786c5fcad8cf84e4e368bea00c378f2f6..3ee104ac123de78113983aa8af0315ff73ddcd17 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_021.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_021.cpp
@@ -89,7 +89,7 @@ static int ProcessTest(void)
     int ret;
     int status = 100;
     pthread_t newPthread, newPthread1;
-    pid_t pid, pid1, pid2;
+    pid_t pid, pid1;
     int count = 0;
 
     g_errorFalg = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_022.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_022.cpp
index 10d9c11205a170767db37a54f368d4d53c4f227f..251eb810116730a5f23c8525ed85433cf32ef19c 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_022.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_022.cpp
@@ -30,7 +30,6 @@
  */
 #include "it_test_process.h"
 
-static int g_waitPid;
 static int g_backPid;
 static int g_backPid1;
 
@@ -70,7 +69,6 @@ static int ProcessTest(void)
     int status = 100;
     pthread_t newPthread, newPthread1;
     pid_t pid, pid1, pid2;
-    int count = 0;
 
     ret = setpgrp();
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_023.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_023.cpp
index 578b9f183d0ede1fe1a1e65c9f29a8a77e52454e..b4c32d1b8b81961bb8ddf52d40ff74ec4364697d 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_023.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_023.cpp
@@ -30,7 +30,6 @@
  */
 #include "it_test_process.h"
 
-static int g_waitPid;
 static int g_backPid;
 static int g_backPid1;
 
@@ -69,11 +68,9 @@ EXIT:
 static int ProcessTest(void)
 {
     int ret;
-    int *error = nullptr;
     int status = 100;
     pthread_t newPthread, newPthread1;
     pid_t pid, pid1, pid2;
-    int count = 0;
 
     g_thread001 = 0;
     g_thread002 = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_024.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_024.cpp
index ed92786862173522ce050bcc77b130724c2dec20..36c12ae10456f502dd9429a9a81dbb8be85bc5bc 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_024.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_024.cpp
@@ -30,12 +30,12 @@
  */
 #include "it_test_process.h"
 
-static int g_waitPid;
 static int g_backPid;
 static int g_backPid1;
 
 static int g_thread001;
 static int g_thread002;
+
 static void *ThreadFunc(void *arg)
 {
     int status = 0;
@@ -68,7 +68,6 @@ static int ProcessTest(void)
     int status = 100;
     pthread_t newPthread, newPthread1;
     pid_t pid, pid1, pid2;
-    int count = 0;
 
     g_thread001 = 0;
     g_thread002 = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_025.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_025.cpp
index 631ac97d3429686f3708e1ec66c45a2fbf733a2e..37e15acc64306d80f30e462407cfa41dea961093 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_025.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_025.cpp
@@ -30,12 +30,12 @@
  */
 #include "it_test_process.h"
 
-static int g_waitPid;
 static int g_backPid;
 static int g_backPid1;
 
 static int g_thread001;
 static int g_thread002;
+
 static void *ThreadFunc(void *arg)
 {
     int status = 0;
@@ -73,7 +73,6 @@ static int ProcessTest(void)
     int status = 100;
     pthread_t newPthread, newPthread1;
     pid_t pid, pid1, pid2;
-    int count = 0;
 
     g_thread001 = 0;
     g_thread002 = 0;
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_027.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_027.cpp
index a1d77e38ceee1823f1b8394dcafe51ce4bef495f..5ae84dd870c98efd02dfa00c8f260c6ec83e86a5 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_027.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_027.cpp
@@ -34,9 +34,7 @@ static int ProcessTest(void)
 {
     int ret;
     int status = 100;
-    pthread_t newPthread;
     pid_t pid;
-    int count = 0;
 
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_029.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_029.cpp
index 71424851dfe7e30002954dffad75636470116ed6..990c9bf6cc808f80d0f9b63a64525bc3bdeceb79 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_029.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_029.cpp
@@ -45,7 +45,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
     int currGid = getpgrp();
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_030.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_030.cpp
index e37b26f8e2cc89818c7f5a8451ad21424d887ac8..1cfce825cd86b7552e22efec44535f4ceae7fdf4 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_030.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_030.cpp
@@ -48,7 +48,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
     int currGid = getpgrp();
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_038.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_038.cpp
index c8cbeba29ed48fcb770bc0757b8077897981202f..37a48845239d516ff75dbb7494bdd6954c426c3a 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_038.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_038.cpp
@@ -47,7 +47,6 @@ static int Child2(int currGid, int gid)
 static int ProcessGroup(void)
 {
     int ret;
-    int status = 0;
     pid_t pid, pid1;
     int currGid = getpgrp();
 
@@ -84,8 +83,7 @@ static int GroupProcess(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
-    int currGid = getpgrp();
+    pid_t pid;
     int count = 30;
 
     while (count > 0) {
@@ -116,8 +114,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
-    int currGid = getpgrp();
+    pid_t pid;
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_039.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_039.cpp
index 2abc9e68d9430db8d7b670d4d5453234c7ea6659..507d61998609e2c405a6d18d82e8d91720634efe 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_039.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_039.cpp
@@ -34,7 +34,7 @@ static int GroupProcess(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
     int count = 1000;
 
     for (int i = 0; i < count; i++) {
@@ -58,8 +58,8 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
-    int currGid = getpgrp();
+    pid_t pid;
+
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_044.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_044.cpp
index 08995680b67b825187ec5e10e518adb460af2745..d46eff1e7b494cac424b92c3b3a662078ed66d2c 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_044.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_044.cpp
@@ -43,8 +43,6 @@ static void *ThreadFuncTest3(void *arg)
 static int GroupProcess(void)
 {
     int ret;
-    int status = 0;
-    pid_t pid, pid1;
     pthread_t newPthread;
     struct timespec ts = { 0 };
 
@@ -74,8 +72,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
-    int currGid = getpgrp();
+    pid_t pid;
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, assert pid equal to this.
 
diff --git a/testsuites/unittest/process/basic/process/smoke/process_test_054.cpp b/testsuites/unittest/process/basic/process/smoke/process_test_054.cpp
index 6de1aec023896680388f93a308c8f1c75b625e2b..662a1fc32d4163fde1611d787598c3304f4a9ccd 100644
--- a/testsuites/unittest/process/basic/process/smoke/process_test_054.cpp
+++ b/testsuites/unittest/process/basic/process/smoke/process_test_054.cpp
@@ -33,7 +33,6 @@
 static int TestCase(void)
 {
     int ret;
-    int pid = 3;
     siginfo_t info = { 0 };
 
     ret = waitid((idtype_t)3, getpgrp(), &info, WEXITED); // 3, set tid.
diff --git a/testsuites/unittest/process/basic/pthread/full/pthread_test_001.cpp b/testsuites/unittest/process/basic/pthread/full/pthread_test_001.cpp
index 8c95f11f13684558a81edfeaaf15254665b6631e..36bc868e79a5f4cb5cd7e6bc9e6203b51dda4f35 100644
--- a/testsuites/unittest/process/basic/pthread/full/pthread_test_001.cpp
+++ b/testsuites/unittest/process/basic/pthread/full/pthread_test_001.cpp
@@ -36,7 +36,6 @@ static int g_threadTestCount1 = 0;
 
 static void *ThreadFunc5(void *ptr)
 {
-    pid_t pid = getpid();
     int ret;
 
     ICUNIT_GOTO_EQUAL(g_threadTestCount1, 2, g_threadTestCount1, EXIT); // 2, here assert the result.
@@ -54,7 +53,6 @@ static void *ThreadFunc4(void *arg)
     pthread_t pthread = pthread_self();
     int i = 0;
     unsigned int ret;
-    pid_t pid = getpid();
 
     ICUNIT_GOTO_EQUAL(g_pthreadTestCount, 9, g_pthreadTestCount, EXIT); // 9, here assert the result.
     g_pthreadTestCount++;                                               // 10
@@ -82,7 +80,6 @@ static void *ThreadFunc3(void *arg)
     pthread_t pthread = pthread_self();
     int i = 0;
     unsigned int ret;
-    pid_t pid = getpid();
 
     g_pthreadTestCount++; // 7
 
@@ -107,8 +104,6 @@ EXIT:
 
 static void *ThreadFunc2(void *arg)
 {
-    pthread_t pthread = pthread_self();
-    pid_t pid = getpid();
     unsigned int ret;
 
     ICUNIT_GOTO_EQUAL(g_pthreadTestCount, 3, g_pthreadTestCount, EXIT); // 3, here assert the result.
@@ -127,8 +122,6 @@ EXIT:
 
 static void *ThreadFunc6(void *arg)
 {
-    pid_t pid = getpid();
-
     ICUNIT_GOTO_EQUAL(g_pthreadTestCount, 12, g_pthreadTestCount, EXIT); // 12, here assert the result.
     g_pthreadTestCount++;                                                // 13
 
@@ -145,7 +138,6 @@ static void *ThreadFunc(void *arg)
     pthread_attr_t a = { 0 };
     pthread_t newPthread;
     struct sched_param param = { 0 };
-    pid_t pid = getpid();
     int curThreadPri, curThreadPolicy;
 
     ICUNIT_GOTO_EQUAL(g_pthreadTestCount, 2, g_pthreadTestCount, EXIT); // 2, here assert the result.
@@ -213,7 +205,6 @@ int PthreadTest001()
     void *res = NULL;
     pthread_attr_t a = { 0 };
     pthread_t newPthread, newPthread1;
-    int count = 0xf0000;
     g_threadTestCount1 = 0;
     g_pthreadTestCount = 0;
 
diff --git a/testsuites/unittest/process/basic/pthread/full/pthread_test_002.cpp b/testsuites/unittest/process/basic/pthread/full/pthread_test_002.cpp
index 9df31cc1395262e7ae6877a432591cdf4608e966..a73b956d6cc4ff29ddba0adf2f21221ed054bcdd 100644
--- a/testsuites/unittest/process/basic/pthread/full/pthread_test_002.cpp
+++ b/testsuites/unittest/process/basic/pthread/full/pthread_test_002.cpp
@@ -52,7 +52,7 @@ static void *ThreadFuncTest2(void *arg)
     (void)arg;
     int ret;
     struct sched_param param = { 0 };
-    int threadPolicy, threadPri;
+    int threadPolicy;
     int old;
     const int waitCount1 = 20;
     const int waitCount2 = 50;
@@ -113,7 +113,7 @@ static void *ThreadFuncTest3(void *arg)
 {
     (void)arg;
     struct sched_param param = { 0 };
-    int threadPolicy, threadPri;
+    int threadPolicy;
     int ret;
     int old = 0;
     const int waitCount1 = 20;
diff --git a/testsuites/unittest/process/basic/pthread/full/pthread_test_014.cpp b/testsuites/unittest/process/basic/pthread/full/pthread_test_014.cpp
index bdabbaf727792341cf43aac667524cf70d3343d9..df2b026c7079264b33587aa3295c29aa4216bbaa 100644
--- a/testsuites/unittest/process/basic/pthread/full/pthread_test_014.cpp
+++ b/testsuites/unittest/process/basic/pthread/full/pthread_test_014.cpp
@@ -102,8 +102,6 @@ static int TestCase(void)
 {
     int ret;
     pthread_t tid, tid1, tid2, tid3;
-    pthread_attr_t attr = { 0 };
-    int scope = 0;
     int threadPolicy = 0;
     struct sched_param param = { 0 };
 
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_atfork_test_001.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_atfork_test_001.cpp
index 9c3a3a3c6eee582d3a12752880bc09106f538ab3..593f61d4487edbdc3f8f26fcd638a0b5d7da8446 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_atfork_test_001.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_atfork_test_001.cpp
@@ -113,7 +113,7 @@ static void *PthreadAtforkTest(void *arg)
 
     if (pid == 0) {
         ICUNIT_GOTO_EQUAL(g_testAtforkChild, 1, g_testAtforkChild, EXIT);
-        int status;
+
         while (g_count < 5) { // 5, wait until g_count == 5.
             err = pthread_mutex_lock(&g_lock);
             ICUNIT_GOTO_EQUAL(err, 0, err, EXIT);
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_atfork_test_002.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_atfork_test_002.cpp
index 018d6139c25c129b4b281ac514fd8005258fcacf..3dddb6dbc204613b65e3d469899184c097b59768 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_atfork_test_002.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_atfork_test_002.cpp
@@ -92,7 +92,7 @@ static void Parent(void)
 
 static void *PthreadAtforkTest(void *arg)
 {
-    int err, ret;
+    int err;
     int pid;
     int status = 0;
     struct timespec ts = { 1, 0 };
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_cond_test_001.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_cond_test_001.cpp
index ed5debcaf2fc937fcfb7bb05d024622f1eada304..0dd9ab33fe34c82c21e9aec57aacdf510a620de9 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_cond_test_001.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_cond_test_001.cpp
@@ -58,7 +58,6 @@ EXIT:
 
 static void *PthreadF02(void *t)
 {
-    int i;
     int rc;
 
     ICUNIT_GOTO_EQUAL(g_testCount, 1, g_testCount, EXIT);
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_cond_test_002.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_cond_test_002.cpp
index 70a2f02c84a277c48772340c3f0ca346adf1e2d6..05305d7c2430dab86637b8a8a866247da451f320 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_cond_test_002.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_cond_test_002.cpp
@@ -58,7 +58,6 @@ EXIT:
 
 static void *PthreadF02(void *t)
 {
-    int i;
     int rc;
 
     while (g_pthreadExit != 1) {
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_003.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_003.cpp
index 5698c5bb6d39795a1b8f689d857f2381a7934085..bcf218e23cccc3e91719072299e957c955d84b5a 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_003.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_003.cpp
@@ -82,8 +82,7 @@ static int Testcase()
     struct sched_param param = { 0 };
     int ret;
     void *res = NULL;
-    pthread_attr_t a = { 0 };
-    pthread_t newPthread, newPthread1;
+    pthread_t newPthread;
 
     g_testPthredCount = 0;
 
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_006.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_006.cpp
index 3846c74f2959171e73877643c59b7783b01e4bab..355c376ebe1cf7f42178e45a50d0afaf7001ed46 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_006.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_006.cpp
@@ -82,11 +82,8 @@ static int Testcase(void)
 {
     struct sched_param param = { 0 };
     int ret;
-    void *res = NULL;
     pthread_attr_t a = { 0 };
-    pthread_t thread;
-    pthread_t newPthread[10], newPthread1;
-    pthread_mutexattr_t mutex;
+    pthread_t newPthread[10];
     int index = 0;
     int currThreadPri, currThreadPolicy;
     int threadParam[10];
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_007.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_007.cpp
index 119de51deaea55426a214bc65318e37eae720a3b..b880f14dc286eaf310f98d1454fcf1fe76cbaac2 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_007.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_007.cpp
@@ -84,8 +84,6 @@ EXIT:
 
 static UINT32 Testcase(VOID)
 {
-    int rc;
-
     int ret = 0;
     pthread_t th1;
     pthread_t th2;
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_008.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_008.cpp
index 1dd20f384fd4d9a27d57030b00c01d7ad624d7ed..0b57ac5f0878998492f985f31f40b78718356fe3 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_008.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_008.cpp
@@ -84,8 +84,6 @@ EXIT:
 
 static UINT32 Testcase(VOID)
 {
-    int rc;
-
     int ret = 0;
     pthread_t th1;
     pthread_t th2;
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_009.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_009.cpp
index bd1968b4a48aae0fe9ae44723d469c149b05af93..883788a761280aaf367df2621615e04ba73ce6f8 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_009.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_009.cpp
@@ -42,9 +42,8 @@ EXIT:
     return NULL;
 }
 
-static UINT32 Testcase(VOID)
+static UINT32 Testcase(void)
 {
-    int ret;
     pthread_attr_t attr;
     g_testCount = 0;
     pthread_attr_init(&attr);
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_010.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_010.cpp
index 45b3fc457ca5e16e3c38c485e74d32ac54aafc48..2f4d485ef5ca7493a40c052070b23be5be6d5793 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_010.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_010.cpp
@@ -30,9 +30,7 @@
  */
 #include "it_pthread_test.h"
 
-static pthread_barrier_t g_barrier;
 static int g_testToCount001 = 0;
-static int g_threadTest[30];
 
 static void *ThreadFuncTest0(void *a)
 {
@@ -41,7 +39,6 @@ static void *ThreadFuncTest0(void *a)
     int currThreadPolicy;
     ret = pthread_getschedparam(pthread_self(), &currThreadPolicy, &param);
     ICUNIT_ASSERT_EQUAL_NULL(ret, 0, (void *)(uintptr_t)ret);
-    int currThreadPri = param.sched_priority;
 
     g_testToCount001++;
 
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_011.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_011.cpp
index 34bc604e8aaa96d83e82a73038799a99b5b7e8cc..9775a4e0aea9c6393e5ebf2a0f149107fe2e8563 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_011.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_011.cpp
@@ -37,7 +37,6 @@ void child1(void)
     int policy, pri, newPolicy;
     struct sched_param param = { 0 };
     pthread_t pthread = pthread_self();
-    int tid = Syscall(SYS_gettid, 0, 0, 0, 0);
 
     int ret = pthread_getschedparam(pthread, &policy, &param);
 
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_015.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_015.cpp
index 84992367324ec1209cae66d35bc14c2a2361b7ea..d592c16e776599cf1c98e840a98c8dbe4ffae0dc 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_015.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_015.cpp
@@ -70,7 +70,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, The pid will never exceed 100000.
 
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_017.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_017.cpp
index edd54539fe9fd7e1e6cdb7cdefc50fb5d8aa2a05..4bd3aec1354f6fff202cb56ae67f2eee0b63076a 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_017.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_017.cpp
@@ -70,7 +70,7 @@ static int TestCase(void)
 {
     int ret;
     int status = 0;
-    pid_t pid, pid1;
+    pid_t pid;
     pid = fork();
     ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, The pid will never exceed 100000.
 
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_018.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_018.cpp
index 26aed44c800bad8da33149b4e06a23c2e53c0f97..b2ef1b182dcaaea330bd4a0550bd796043350d23 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_018.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_018.cpp
@@ -59,10 +59,8 @@ static int GroupProcess(void)
     pthread_t th1;
     pthread_attr_t attr;
     pthread_attr_init(&attr);
-    int policy = 0;
     unsigned int *getStack = NULL;
     size_t getSize;
-    struct sched_param param = { 0 };
     int stackSize = 0x3000;
 
     g_testCnt = 0;
diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_019.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_019.cpp
index e219eed46bbbfa764dd744d86d3a16e256a8ac6b..600549862449c46b4d573acb70fa72a746496a03 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_019.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_019.cpp
@@ -59,10 +59,8 @@ static int GroupProcess(void)
     pthread_t th1;
     pthread_attr_t attr;
     pthread_attr_init(&attr);
-    int policy = 0;
     unsigned int *getStack = NULL;
     size_t getSize;
-    struct sched_param param = { 0 };
     int stackSize = 2047;
     void *stack = (void *)&getSize;
 
diff --git a/testsuites/unittest/process/lock/mutex/full/pthread_mutex_test_018.cpp b/testsuites/unittest/process/lock/mutex/full/pthread_mutex_test_018.cpp
index 7980e275b2dd85ee2f08fbdae6187f6e4bdfa0a0..0bb0ed699a4062f99bf541be05d1daf20a50a69e 100644
--- a/testsuites/unittest/process/lock/mutex/full/pthread_mutex_test_018.cpp
+++ b/testsuites/unittest/process/lock/mutex/full/pthread_mutex_test_018.cpp
@@ -31,20 +31,16 @@
 #include "it_mutex_test.h"
 
 static pthread_mutex_t g_muxLock001;
-static pthread_mutex_t g_muxLock002;
 static pthread_mutex_t g_muxLock003;
 
 static const unsigned int TEST_COUNT = 10;
 static volatile int g_testToCount001 = 0;
 static volatile int g_testToCount002 = 0;
-static volatile int g_testToCount003 = 0;
 
 static void *ThreadFuncTest2(void *a)
 {
     int ret;
     pthread_t thread = pthread_self();
-    struct timespec time;
-    struct timeval timeVal = { 0 };
 
     ret = pthread_detach(thread);
     ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT);
@@ -67,7 +63,6 @@ EXIT:
 static void *ThreadFuncTest1(void *a)
 {
     int ret;
-    pthread_t thread = pthread_self();
     struct timespec time;
     struct timeval timeVal = { 0 };
 
@@ -98,9 +93,7 @@ static int Testcase(void)
 {
     struct sched_param param = { 0 };
     int ret;
-    void *res = nullptr;
     pthread_attr_t a = { 0 };
-    pthread_t thread = pthread_self();
     pthread_t newPthread, newPthread1;
     pthread_mutexattr_t mutex;
     int index = TEST_COUNT;
diff --git a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_007.cpp b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_007.cpp
index b3129b807197ae506c66b6b0dbd17d6d8086809c..f6ff75bba2e29e78c786552ff3f253305493e2d7 100644
--- a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_007.cpp
+++ b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_007.cpp
@@ -43,7 +43,6 @@ static void *ThreadFuncTest3(void *a)
 {
     int ret;
     pthread_t thread = pthread_self();
-    struct sched_param param = { 0 };
     struct timespec time;
     struct timeval timeVal = { 0 };
 
diff --git a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_019.cpp b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_019.cpp
index 05fdb6fa4f3fd2f34d5eb375ae38f89e14506019..e2450aca7d69c5b49bafab44c0a20a09f6d0a488 100644
--- a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_019.cpp
+++ b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_019.cpp
@@ -31,7 +31,6 @@
 #include "it_mutex_test.h"
 
 static pthread_mutex_t g_muxLock001;
-static pthread_mutex_t g_muxLock002;
 static pthread_mutex_t g_muxLock003;
 
 static const unsigned int TEST_COUNT = 10;
@@ -39,7 +38,6 @@ static const unsigned int NEW_THREAD_COUNT = 10;
 
 static volatile int g_testToCount001 = 0;
 static volatile int g_testToCount002 = 0;
-static volatile int g_testToCount003 = 0;
 
 static void *ThreadFuncTest2(void *a)
 {
@@ -73,7 +71,7 @@ static void *ThreadFuncTest1(void *a)
     gettimeofday(&timeVal, nullptr);
 
     if(timeVal.tv_usec + 100000 >= 1000000) { // 100000us, delay time; 1000000us, compare
-        time.tv_sec = timeVal.tv_sec + 1; 
+        time.tv_sec = timeVal.tv_sec + 1;
         time.tv_nsec = (timeVal.tv_usec + 100000 - 1000000) * 1000; // 100000, delaytime; 1000, us to ns; 1000000us=1s;
     } else {
         time.tv_sec = timeVal.tv_sec + 0;
diff --git a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_020.cpp b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_020.cpp
index 0c1f334ecf40d8a9fbf3393e9365d7ec5fa320c6..3a563dcf1459a22acff3fbe3013c70e05f4937bf 100644
--- a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_020.cpp
+++ b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_020.cpp
@@ -31,7 +31,6 @@
 #include "it_mutex_test.h"
 
 static pthread_mutex_t g_muxLock001;
-static pthread_mutex_t g_muxLock002;
 static pthread_mutex_t g_muxLock003;
 
 static const unsigned int TEST_COUNT = 10;
diff --git a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_021.cpp b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_021.cpp
index 4a5158613744f3f17a624859ab30a738d5ce1841..326dd8630e224363273171a0cb6e26824891fec1 100644
--- a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_021.cpp
+++ b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_021.cpp
@@ -31,7 +31,6 @@
 #include "it_mutex_test.h"
 
 static pthread_mutex_t g_muxLock001;
-static pthread_mutex_t g_muxLock002;
 static pthread_mutex_t g_muxLock003;
 
 static const unsigned int TEST_COUNT = 10;
diff --git a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_022.cpp b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_022.cpp
index 0ed49774be15b1abbac67900f93f7ab8356645d3..baf69ede379d1b3e71642ba5bef6fda4a96124ae 100644
--- a/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_022.cpp
+++ b/testsuites/unittest/process/lock/mutex/smoke/pthread_mutex_test_022.cpp
@@ -31,7 +31,6 @@
 #include "it_mutex_test.h"
 
 static pthread_mutex_t g_muxLock001;
-static pthread_mutex_t g_muxLock002;
 static pthread_mutex_t g_muxLock003;
 
 static const unsigned int TEST_COUNT = 10;
diff --git a/testsuites/unittest/process/lock/rwlock/full/pthread_rwlock_test_002.cpp b/testsuites/unittest/process/lock/rwlock/full/pthread_rwlock_test_002.cpp
index 075c2aa8f131e5e6f47a483a6503d0f00faea281..85b14fadec02551a5a4507f4341d2b76f8e83b80 100644
--- a/testsuites/unittest/process/lock/rwlock/full/pthread_rwlock_test_002.cpp
+++ b/testsuites/unittest/process/lock/rwlock/full/pthread_rwlock_test_002.cpp
@@ -49,8 +49,8 @@ static int g_readPar[READ_THREAD_COUNT];
 static void RwlockWait()
 {
     int count;
-    int count1;
     for (count = 0xFFFFFFF; count != 0; count--) {
+        ;
     }
 }
 
@@ -178,7 +178,6 @@ static void *ThreadWriteFunc(void *a)
     int ret;
     int count = 0;
     int oldRwlockMask;
-    pthread_t thread = pthread_self();
     int threadCount = *((int *)a);
 
     while (CheckReadThreadExit() || CheckWriteThreadExit()) {
@@ -221,9 +220,7 @@ static int PthreadRwlockTest(void)
     void *res = nullptr;
     int count = 0;
     pthread_attr_t a = { 0 };
-    pthread_t thread = pthread_self();
     pthread_t newPthread, newPthread1;
-    pthread_rwlockattr_t rwlock;
     int index = 0;
     int curThreadPri, curThreadPolicy;
 
diff --git a/testsuites/unittest/process/lock/rwlock/smoke/pthread_rwlock_test_001.cpp b/testsuites/unittest/process/lock/rwlock/smoke/pthread_rwlock_test_001.cpp
index c50dda80324f1322260b20850faffe56bb053d85..192b347ae7c55a8d4c4956cadfbd0c6aa7cfe5fa 100644
--- a/testsuites/unittest/process/lock/rwlock/smoke/pthread_rwlock_test_001.cpp
+++ b/testsuites/unittest/process/lock/rwlock/smoke/pthread_rwlock_test_001.cpp
@@ -50,8 +50,8 @@ static int g_readPar[READ_THREAD_COUNT];
 static void RwlockWait()
 {
     int count;
-    int count1;
     for (count = 0xFFFFFFF; count != 0; count--) {
+        ;
     }
 }
 
@@ -179,7 +179,6 @@ static void *ThreadWriteFunc(void *a)
     int ret;
     int count = 0;
     int oldRwlockMask;
-    pthread_t thread = pthread_self();
     int threadCount = *((int *)a);
 
     while (CheckReadThreadExit() || CheckWriteThreadExit()) {
@@ -221,9 +220,7 @@ static int Testcase(void)
     void *res = nullptr;
     int count = 0;
     pthread_attr_t a = { 0 };
-    pthread_t thread = pthread_self();
     pthread_t newPthread, newPthread1;
-    pthread_rwlockattr_t rwlock;
     int index = 0;
     int curThreadPri, curThreadPolicy;
 
diff --git a/testsuites/unittest/process/lock/spinlock/smoke/pthread_spinlock_test_001.cpp b/testsuites/unittest/process/lock/spinlock/smoke/pthread_spinlock_test_001.cpp
index 96c48729818f56fc0778268903ad16fc08842aff..ad963719640ec2cb928513fc72779f038cce52a5 100644
--- a/testsuites/unittest/process/lock/spinlock/smoke/pthread_spinlock_test_001.cpp
+++ b/testsuites/unittest/process/lock/spinlock/smoke/pthread_spinlock_test_001.cpp
@@ -90,7 +90,6 @@ static void *ThreadWriteFunc(void *a)
     int ret;
     int testCount = TEST_LOOP_COUNT;
     int oldRwlockMask;
-    pthread_t thread = pthread_self();
     int threadCount = *((int *)a);
     int count;
 
@@ -128,9 +127,7 @@ static int Testcase(void)
     int ret;
     void *res = nullptr;
     pthread_attr_t a = { 0 };
-    pthread_t thread = pthread_self();
     pthread_t newPthread, newPthread1;
-    pthread_rwlockattr_t rwlock;
     int index = 0;
     int curThreadPri, curThreadPolicy;
 
diff --git a/testsuites/unittest/security/reugid/smoke/reugid_test_001.cpp b/testsuites/unittest/security/reugid/smoke/reugid_test_001.cpp
index 4dfa614135ebc18cda046b03a98fd71125e9773e..064754681b76b8d79bf87d0669bc1ffadf982df0 100644
--- a/testsuites/unittest/security/reugid/smoke/reugid_test_001.cpp
+++ b/testsuites/unittest/security/reugid/smoke/reugid_test_001.cpp
@@ -43,7 +43,6 @@ static int Child1(int *list, int listSize)
     int suid = 100;
     int rgid = 0;
     int egid = 0;
-    int sgid = 100;
     int ret;
 
     rgid = getgid();
@@ -406,7 +405,7 @@ EXIT:
     return 1;
 }
 
-static int TestCase(VOID)
+static int TestCase(void)
 {
     int ret;
     int status = 0;