diff --git a/base/test/unittest/common/utils_ashmem_test.cpp b/base/test/unittest/common/utils_ashmem_test.cpp
index d809159c809a414036ac4775e7743c0088cc871f..c2b97b2cee49cca8404d94d5f6418e5da0287288 100644
--- a/base/test/unittest/common/utils_ashmem_test.cpp
+++ b/base/test/unittest/common/utils_ashmem_test.cpp
@@ -27,9 +27,10 @@
 #include "ashmem.h"
 
 using namespace testing::ext;
-using namespace OHOS;
 using namespace std;
 
+namespace OHOS {
+namespace {
 const int MAX_PARCEL_SIZE = 1000;
 char g_data[MAX_PARCEL_SIZE];
 const int32_t MEMORY_SIZE = 1024;
@@ -367,3 +368,5 @@ HWTEST_F(UtilsAshmemTest, test_ashmem_InvalidOperation_006, TestSize.Level0)
     ashmem->CloseAshmem();
     EXPECT_FALSE(ret);
 }
+}  // namespace
+}  // namespace OHOS
\ No newline at end of file