diff --git a/old/services/core/test/unittest/event_subscribe_test.cpp b/old/services/core/test/unittest/event_subscribe_test.cpp
index a605f2e51c68bffe757cde7cd7de487262e75c16..2cfaab34d87103748230c998b3d0cc75699aab4c 100644
--- a/old/services/core/test/unittest/event_subscribe_test.cpp
+++ b/old/services/core/test/unittest/event_subscribe_test.cpp
@@ -29,6 +29,9 @@ using namespace std::chrono_literals;
 using namespace testing;
 using namespace testing::ext;
 
+namespace {
+const int32_t UT_ERROR = -1;
+}
 class EventSubscribeTest : public testing::Test {
 public:
     static void SetUpTestCase();
@@ -117,6 +120,9 @@ int32_t PutFakeSystem()
 int32_t MockSubscribeEvents(const std::shared_ptr<ProfileEventCallback>& eventCb,
     const std::list<std::string>& serviceIds, const std::string& deviceId)
 {
+    if (eventCb == nullptr) {
+        return UT_ERROR;
+    }
     eventCb->SetSubServiceIds(serviceIds);
     ExtraInfo extraInfo;
     extraInfo["deviceId"] = deviceId;
@@ -139,6 +145,9 @@ int32_t MockSubscribeEvents(const std::shared_ptr<ProfileEventCallback>& eventCb
 
 int32_t MockUnsubscribeEvents(const std::shared_ptr<ProfileEventCallback>& eventCb)
 {
+    if (eventCb == nullptr) {
+        return UT_ERROR;
+    }
     std::list<ProfileEvent> profileEvents;
     profileEvents.emplace_back(ProfileEvent::EVENT_PROFILE_CHANGED);
     profileEvents.emplace_back(ProfileEvent::EVENT_SYNC_COMPLETED);
@@ -150,6 +159,9 @@ int32_t MockUnsubscribeEvents(const std::shared_ptr<ProfileEventCallback>& event
 int32_t MockSubscribeEvent(const std::shared_ptr<ProfileEventCallback>& eventCb,
     const std::list<std::string>& serviceIds, const std::string& deviceId)
 {
+    if (eventCb == nullptr) {
+        return UT_ERROR;
+    }
     eventCb->SetSubServiceIds(serviceIds);
     ExtraInfo extraInfo;
     extraInfo["deviceId"] = deviceId;
diff --git a/old/services/core/test/unittest/profile_event_notifier_proxy_test.cpp b/old/services/core/test/unittest/profile_event_notifier_proxy_test.cpp
index 5813e964fe37d009de423199dcb148d6685454fc..8ab53223f421dffe820136d82fca26a0c3ee7be2 100644
--- a/old/services/core/test/unittest/profile_event_notifier_proxy_test.cpp
+++ b/old/services/core/test/unittest/profile_event_notifier_proxy_test.cpp
@@ -69,6 +69,7 @@ HWTEST_F(ProfileEventNotifierProxyTest, OnSyncCompleted_001, TestSize.Level3)
     auto syncCb = std::make_shared<StorageProfileEventCallback>();
     sptr<ProfileEventNotifierStub> stub(new ProfileEventNotifierStub(syncCb));
     sptr<ProfileEventNotifierProxy> proxy(new ProfileEventNotifierProxy(stub));
+    ASSERT_NE(proxy, nullptr);
     SyncResult syncResults;
     proxy->OnSyncCompleted(syncResults);
     EXPECT_EQ(syncCb->result, 0);
@@ -85,6 +86,7 @@ HWTEST_F(ProfileEventNotifierProxyTest, OnSyncCompleted_002, TestSize.Level3)
     auto syncCb = std::make_shared<StorageProfileEventCallback>();
     sptr<ProfileEventNotifierStub> stub(new ProfileEventNotifierStub(syncCb));
     sptr<ProfileEventNotifierProxy> proxy(new ProfileEventNotifierProxy(stub));
+    ASSERT_NE(proxy, nullptr);
     SyncResult syncResults;
     syncResults.emplace("testdeviceid", SUCCEEDED);
     proxy->OnSyncCompleted(syncResults);
@@ -102,6 +104,7 @@ HWTEST_F(ProfileEventNotifierProxyTest, OnProfileChanged_001, TestSize.Level3)
     auto syncCb = std::make_shared<StorageProfileEventCallback>();
     sptr<ProfileEventNotifierStub> stub(new ProfileEventNotifierStub(syncCb));
     sptr<ProfileEventNotifierProxy> proxy(new ProfileEventNotifierProxy(stub));
+    ASSERT_NE(proxy, nullptr);
     ProfileChangeNotification notification;
     proxy->OnProfileChanged(notification);
     EXPECT_EQ(syncCb->result, 0);
diff --git a/services/core/src/distributed_device_profile_service_new.cpp b/services/core/src/distributed_device_profile_service_new.cpp
index bbe8f574c5973e1c8028d102464fa7fc26b2602c..4f4d2a1243b3edc6af036b7216c3f6ae996a3fb8 100644
--- a/services/core/src/distributed_device_profile_service_new.cpp
+++ b/services/core/src/distributed_device_profile_service_new.cpp
@@ -545,6 +545,9 @@ void DistributedDeviceProfileServiceNew::DelayUnloadTask()
         }
         HILOGI("kill dp svr success!");
     };
+    if (unloadHandler_ == nullptr) {
+        return;
+    }
     unloadHandler_->RemoveTask(UNLOAD_TASK_ID);
     HILOGI("delay unload task post task");
     unloadHandler_->PostTask(task, UNLOAD_TASK_ID, DELAY_TIME);
diff --git a/services/core/test/unittest/distributed_device_profile_client_rdb_test.cpp b/services/core/test/unittest/distributed_device_profile_client_rdb_test.cpp
index 82e9cd17aa0c6f08a24d2b01276aa2dbcc243a2d..25b4adea3a98f37abd3ac2c4fe93c136e6e8912d 100644
--- a/services/core/test/unittest/distributed_device_profile_client_rdb_test.cpp
+++ b/services/core/test/unittest/distributed_device_profile_client_rdb_test.cpp
@@ -136,7 +136,7 @@ void DistributedDeviceProfileClientRdbTest::TearDown()
 
 int DistributedDeviceProfileClientRdbTest::ResultSize(std::shared_ptr<ResultSet> &resultSet)
 {
-    if (resultSet->GoToFirstRow() != E_OK) {
+    if (resultSet == nullptr || resultSet->GoToFirstRow() != E_OK) {
         return 0;
     }
     int count;
diff --git a/services/core/test/unittest/dp_subscribe_info_test.cpp b/services/core/test/unittest/dp_subscribe_info_test.cpp
index b7896d96dffd35b52aa44fc77668ab57cfea8036..2387093ab11f0e764d07a21da8d9c091d79795e1 100644
--- a/services/core/test/unittest/dp_subscribe_info_test.cpp
+++ b/services/core/test/unittest/dp_subscribe_info_test.cpp
@@ -250,6 +250,7 @@ HWTEST_F(DPSubscribeInfoTest, Stub_001, TestSize.Level1)
     OHOS::sptr<IProfileChangeListener> proxy = OHOS::iface_cast<IProfileChangeListener>(subscribeInfo.GetListener());
     TrustDeviceProfile oldTrustProfile;
     TrustDeviceProfile newTrustProfile;
+    ASSERT_NE(proxy, nullptr);
     int32_t ret = proxy->OnTrustDeviceProfileAdd(oldTrustProfile);
     EXPECT_EQ(ret, DP_SUCCESS);
     ret = proxy->OnTrustDeviceProfileDelete(oldTrustProfile);
diff --git a/services/core/test/unittest/sync_completed_callback_test.cpp b/services/core/test/unittest/sync_completed_callback_test.cpp
index 5983d54a6ab5c8e6cb8c0ed9ea48b4337f8170d9..b25733024a1b25d31b8e2ed4341c5e6b7f8571a3 100644
--- a/services/core/test/unittest/sync_completed_callback_test.cpp
+++ b/services/core/test/unittest/sync_completed_callback_test.cpp
@@ -142,6 +142,7 @@ HWTEST_F(SyncCompletedCallbackStubTest, OnRemoteRequest_003, TestSize.Level3)
 
     sptr<SyncCompletedListener> stub(new SyncCompletedListener());
     sptr<SyncCompletedCallbackProxy> proxy(new SyncCompletedCallbackProxy(stub));
+    ASSERT_NE(proxy, nullptr);
     syncResults.emplace("testdeviceid", SUCCEEDED);
     proxy->OnSyncCompleted(syncResults);
 }