diff --git a/test/unittest/datatransmitmgr/DevSLMgrTest.cpp b/test/unittest/datatransmitmgr/DevSLMgrTest.cpp
index 14d2a84d89bab7e115ffe897f60c43b61e054a26..77c4ebec5cb9d4b9ad66d8b2d44847852e73334f 100644
--- a/test/unittest/datatransmitmgr/DevSLMgrTest.cpp
+++ b/test/unittest/datatransmitmgr/DevSLMgrTest.cpp
@@ -41,6 +41,7 @@ private:
 };
 
 static const int32_t DEV_SEC_LEVEL_ERR = 100;
+static const int32_t LIST_LENGTH = 128;
 
 struct DeviceSecurityInfo {
     uint32_t magicNum {0};
@@ -102,6 +103,13 @@ static void DATASL_GetUdidByExcept(DEVSLQueryParams *queryParams)
     queryParams->udidLen = MAX_UDID_LENGTH + 1;
 }
 
+static void DATASL_GetUdidByExceptZero(DEVSLQueryParams *queryParams)
+{
+    char udid[65] = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF";
+    (void)memcpy_s(queryParams->udid, MAX_UDID_LENGTH, udid, MAX_UDID_LENGTH);
+    queryParams->udidLen = 0;
+}
+
 static int32_t GetLocalUdid(DEVSLQueryParams *queryParams)
 {
     const char *pkgName = "ohos.dslm";
@@ -388,4 +396,92 @@ static HWTEST_F(DevSLMgrTest, TestGetHighestSecLevelExcept003, TestSize.Level1)
     ClearList(g_tmpList);
     g_tmpList = nullptr;
     DestroyPthreadMutex();
+}
+
+static void tmpCallbackExcept004(DEVSLQueryParams *queryParams, int32_t result, uint32_t levelInfo)
+{
+    EXPECT_EQ(DEVSL_ERR_BAD_PARAMETERS, result);
+}
+
+static void AddList(void)
+{
+    DEVSLQueryParams queryParams;
+    (void)memset_s(&queryParams, sizeof(queryParams), 0, sizeof(queryParams));
+    (void)GetLocalUdid(&queryParams);
+
+    struct DATASLCallbackParams *newListNode =
+        (struct DATASLCallbackParams*)malloc(sizeof(struct DATASLCallbackParams));
+    if (newListNode == nullptr) {
+        EXPECT_EQ(DEVSL_SUCCESS, DEVSL_SUCCESS);
+    }
+    (void)memcpy_s(newListNode->queryParams.udid, MAX_UDID_LENGTH, queryParams.udid, queryParams.udidLen);
+    newListNode->queryParams.udidLen = queryParams.udidLen;
+    newListNode->callback = &tmpCallbackExcept004;
+
+    PushListNode(g_tmpList, newListNode);
+}
+
+static HWTEST_F(DevSLMgrTest, TestGetHighestSecLevelExcept004, TestSize.Level1)
+{
+    int32_t ret;
+    ret = DATASL_OnStart();
+    EXPECT_EQ(DEVSL_SUCCESS, ret);
+
+    DEVSLQueryParams queryParams;
+    (void)memset_s(&queryParams, sizeof(queryParams), 0, sizeof(queryParams));
+    DATASL_GetUdidByExceptZero(&queryParams);
+    uint32_t levelInfo = 0;
+    ret = DATASL_GetHighestSecLevel(&queryParams, &levelInfo);
+    EXPECT_EQ(DEVSL_ERR_BAD_PARAMETERS, ret);
+
+    ret = DATASL_GetHighestSecLevelAsync(&queryParams, &tmpCallbackExcept004);
+    EXPECT_EQ(DEVSL_ERR_BAD_PARAMETERS, ret);
+
+    g_tmpList = InitList();
+    if (g_tmpList != nullptr) {
+        EXPECT_EQ(DEVSL_SUCCESS, DEVSL_SUCCESS);
+    } else {
+        EXPECT_EQ(DEVSL_SUCCESS, DEVSL_ERROR);
+    }
+    for (int i = 0; i < LIST_LENGTH; i++) {
+        AddList();
+    }
+    (void)GetListLength(g_tmpList);
+
+    ClearList(g_tmpList);
+    g_tmpList = nullptr;
+    DATASL_OnStop();
+}
+
+static HWTEST_F(DevSLMgrTest, TestGetHighestSecLevelExcept005, TestSize.Level1)
+{
+    int32_t ret;
+    ret = DATASL_OnStart();
+    EXPECT_EQ(DEVSL_SUCCESS, ret);
+
+    g_tmpList = InitList();
+    if (g_tmpList != nullptr) {
+        EXPECT_EQ(DEVSL_SUCCESS, DEVSL_SUCCESS);
+    } else {
+        EXPECT_EQ(DEVSL_SUCCESS, DEVSL_ERROR);
+    }
+
+    DEVSLQueryParams queryParams;
+    (void)memset_s(&queryParams, sizeof(queryParams), 0, sizeof(queryParams));
+    (void)GetLocalUdid(&queryParams);
+    struct DATASLCallbackParams *newListNode =
+        (struct DATASLCallbackParams*)malloc(sizeof(struct DATASLCallbackParams));
+    if (newListNode == nullptr) {
+        EXPECT_EQ(DEVSL_SUCCESS, DEVSL_SUCCESS);
+    }
+    (void)memcpy_s(newListNode->queryParams.udid, MAX_UDID_LENGTH, queryParams.udid, queryParams.udidLen);
+    newListNode->queryParams.udidLen = queryParams.udidLen;
+    newListNode->callback = nullptr;
+    RemoveListNode(g_tmpList, newListNode);
+    PushListNode(g_tmpList, newListNode);
+    RemoveListNode(g_tmpList, newListNode);
+
+    ClearList(g_tmpList);
+    g_tmpList = nullptr;
+    DATASL_OnStop();
 }
\ No newline at end of file
diff --git a/test/unittest/datatransmitmgr/DevSLMgrTest.h b/test/unittest/datatransmitmgr/DevSLMgrTest.h
index 7bea2a84c968c5ba4ea157f96314c7b18c1cd589..6757f49275419564583b2fc58d82420f07324226 100644
--- a/test/unittest/datatransmitmgr/DevSLMgrTest.h
+++ b/test/unittest/datatransmitmgr/DevSLMgrTest.h
@@ -29,5 +29,8 @@ int TestGetHighestSecLevelAsync004(void);
 
 int TestGetHighestSecLevelExcept001(void);
 int TestGetHighestSecLevelExcept002(void);
+int TestGetHighestSecLevelExcept003(void);
+int TestGetHighestSecLevelExcept004(void);
+int TestGetHighestSecLevelExcept005(void);
 
 #endif
\ No newline at end of file