diff --git a/brightness_manager/test/unittest/src/brightness_manager_test.cpp b/brightness_manager/test/unittest/src/brightness_manager_test.cpp
index 29ea2d9639a1e72c5b7f2aa89506aa8f351ea38c..d208142156c3c619aace446ead953dea554e6eaf 100644
--- a/brightness_manager/test/unittest/src/brightness_manager_test.cpp
+++ b/brightness_manager/test/unittest/src/brightness_manager_test.cpp
@@ -47,7 +47,8 @@ namespace {
 HWTEST_F(BrightnessManagerTest, BrightnessManagerGet001, TestSize.Level0)
 {
     DISPLAY_HILOGI(LABEL_TEST, "BrightnessManagerGet001: fun is start");
-    BrightnessManager::Get();
+    auto& brightnessManager = BrightnessManager::Get();
+    EXPECT_NE(&brightnessManager, nullptr);
     const int sleepTime = 100000;
     usleep(sleepTime);
     DISPLAY_HILOGI(LABEL_TEST, "BrightnessManagerGet001: fun is end");
diff --git a/brightness_manager/test/unittest/src/brightness_service_test.cpp b/brightness_manager/test/unittest/src/brightness_service_test.cpp
index 49379cbe2feac986d318b3ef2fe85dd6fe12120b..62d9f88c27aeee9638dd1bd3e8d3dcb34bdbc858 100644
--- a/brightness_manager/test/unittest/src/brightness_service_test.cpp
+++ b/brightness_manager/test/unittest/src/brightness_service_test.cpp
@@ -47,7 +47,8 @@ namespace {
 HWTEST_F(BrightnessServiceTest, BrightnessServiceGet001, TestSize.Level0)
 {
     DISPLAY_HILOGI(LABEL_TEST, "BrightnessServiceGet001: fun is start");
-    BrightnessService::Get();
+    auto& brightnessService = BrightnessService::Get();
+    EXPECT_NE(&brightnessService, nullptr);
     DISPLAY_HILOGI(LABEL_TEST, "BrightnessServiceGet001: fun is end");
 }
 } // namespace
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