diff --git a/services/ans/include/advanced_notification_inline.h b/services/ans/include/advanced_notification_inline.h
index 6658d1d126407bec5f36e79189a148c8fc730ce8..23972945c11240062f86daf38cf468fb43254e48 100644
--- a/services/ans/include/advanced_notification_inline.h
+++ b/services/ans/include/advanced_notification_inline.h
@@ -39,7 +39,7 @@ inline std::string GetClientBundleNameByUid(int32_t callingUid)
     return bundle;
 }
 
-inline std::string GetClientBundleName()
+inline std::string __attribute__((weak)) GetClientBundleName()
 {
     int32_t callingUid = IPCSkeleton::GetCallingUid();
     return GetClientBundleNameByUid(callingUid);
diff --git a/services/ans/src/advanced_notification_inline.cpp b/services/ans/src/advanced_notification_inline.cpp
index 9be433936f2e42def16925f2046c509589a736e6..fcc7c3da0503e34020e01168d5c2b92e49b80347 100644
--- a/services/ans/src/advanced_notification_inline.cpp
+++ b/services/ans/src/advanced_notification_inline.cpp
@@ -45,7 +45,7 @@ inline std::string GetClientBundleNameByUid(int32_t callingUid)
     return bundle;
 }
 
-inline std::string GetClientBundleName()
+inline std::string __attribute__((weak)) GetClientBundleName()
 {
     int32_t callingUid = IPCSkeleton::GetCallingUid();
     return GetClientBundleNameByUid(callingUid);
diff --git a/test/fuzztest/advancednotificationservice/advancednotificationservice_fuzztest_common.gni b/test/fuzztest/advancednotificationservice/advancednotificationservice_fuzztest_common.gni
index b0faf95a7eadd97f01987fac2431cd6b579cf4e3..e25f90b5febc7d7617c1a5984845dd5d7f47bcd4 100644
--- a/test/fuzztest/advancednotificationservice/advancednotificationservice_fuzztest_common.gni
+++ b/test/fuzztest/advancednotificationservice/advancednotificationservice_fuzztest_common.gni
@@ -22,7 +22,8 @@ template("advancednotificationservice_fuzztest_target") {
   
   ohos_fuzztest(target_name) {
     module_out_path = service_fuzz_test_path
-    sources = invoker.sources_value
+    sources = [ "${component_path}/test/fuzztest/fuzz_common_base/mock/mock_notification_func.cpp", ]
+    sources += invoker.sources_value
     fuzz_config_file = invoker.fuzz_config_file_value
     include_dirs = [ "${services_path}/ans/include" ]
     cflags = [
diff --git a/test/fuzztest/fuzz_common_base/mock/mock_notification_func.cpp b/test/fuzztest/fuzz_common_base/mock/mock_notification_func.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4854d1fa784b3c2d449d99eb47f66db61bbdda29
--- /dev/null
+++ b/test/fuzztest/fuzz_common_base/mock/mock_notification_func.cpp
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <string>
+
+namespace OHOS {
+namespace Notification {
+std::string GetClientBundleName()
+{
+    return "bundletest";
+}
+
+}  // namespace Notification
+}  // namespace OHOS