diff --git a/frameworks/ans/src/notification_request.cpp b/frameworks/ans/src/notification_request.cpp
index 1ec29aa2fd71c9f528a3cb286623c068d3014bff..f7415525a761f84bc19148e64f394eeca9fd2269 100644
--- a/frameworks/ans/src/notification_request.cpp
+++ b/frameworks/ans/src/notification_request.cpp
@@ -879,6 +879,11 @@ std::string NotificationRequest::CollaborationToJson() const
 
 NotificationRequest *NotificationRequest::CollaborationFromJson(const std::string& basicInfo)
 {
+    if (basicInfo.empty() || !nlohmann::json::accept(basicInfo)) {
+        ANS_LOGE("Invalid JSON string");
+        return nullptr;
+    }
+
     nlohmann::json jsonObject = nlohmann::json::parse(basicInfo, nullptr, false);
     if (jsonObject.is_null() or !jsonObject.is_object()) {
         ANS_LOGE("Invalid JSON object");
diff --git a/services/ans/test/unittest/advanced_notification_service_test.cpp b/services/ans/test/unittest/advanced_notification_service_test.cpp
index 4f6b14e20aa94a3f086eb20c5ee6ac6a78eb110d..ccf70904d3a1ce97ec943ed0e7e16f7fc28f7b6b 100644
--- a/services/ans/test/unittest/advanced_notification_service_test.cpp
+++ b/services/ans/test/unittest/advanced_notification_service_test.cpp
@@ -2091,8 +2091,8 @@ HWTEST_F(AdvancedNotificationServiceTest, OnDistributedPublish_0500, Function |
 }
 
 /**
- * @tc.number    : OnDistributedPublish_0300
- * @tc.name      : OnDistributedPublish_0300
+ * @tc.number    : OnDistributedPublish_0600
+ * @tc.name      : OnDistributedPublish_0600
  * @tc.desc      : Test OnDistributedPublish function
  * @tc.require   : #I61RF2
  */
@@ -2107,6 +2107,7 @@ HWTEST_F(AdvancedNotificationServiceTest, OnDistributedPublish_0600, Function |
     request->SetOwnerBundleName("test");
     request->SetUpdateOnly(true);
     advancedNotificationService.OnDistributedPublish(deviceId, bundleName, request);
+    SleepForFC();
     ASSERT_EQ(advancedNotificationService.notificationList_.size(), 0);
 }
 
@@ -4586,14 +4587,14 @@ HWTEST_F(AdvancedNotificationServiceTest, SetSilentReminderEnabled_00002, Functi
 
     ErrCode ret = advancedNotificationService.IsSilentReminderEnabled(bo, enableStatusInt);
     ASSERT_EQ(ret, ERR_OK);
-    ASSERT_EQ(enableStatusInt, 0);
+    ASSERT_EQ(enableStatusInt, 2);
 
     ret = advancedNotificationService.SetSilentReminderEnabled(bo, true);
     ASSERT_EQ(ret, ERR_OK);
 
     ret = advancedNotificationService.IsSilentReminderEnabled(bo, enableStatusInt);
     ASSERT_EQ(ret, ERR_OK);
-    ASSERT_EQ(enableStatusInt, 2);
+    ASSERT_EQ(enableStatusInt, 1);
 }
 
 /**
diff --git a/services/ans/test/unittest/advanced_notification_service_test/advanced_notification_distributed_manager_service_test.cpp b/services/ans/test/unittest/advanced_notification_service_test/advanced_notification_distributed_manager_service_test.cpp
index 399281464079eabc4cadefc180ee995fc3c22f45..5da4796174429d00158811b2fa5bcf18ae0ee32e 100644
--- a/services/ans/test/unittest/advanced_notification_service_test/advanced_notification_distributed_manager_service_test.cpp
+++ b/services/ans/test/unittest/advanced_notification_service_test/advanced_notification_distributed_manager_service_test.cpp
@@ -265,7 +265,7 @@ HWTEST_F(AdvancedNotificationDistMgrServiceTest, DistributeOperation_300, Functi
 
 /**
  * @tc.name: DistributeOperation_400
- * @tc.desc: Test DistributeOperation when record's NotificationRequestPoint is nullptr.
+ * @tc.desc: Test DistributeOperation when notification don't support distributed collaboration.
  * @tc.type: FUNC
  * @tc.require: issue
  */
@@ -277,7 +277,7 @@ HWTEST_F(AdvancedNotificationDistMgrServiceTest, DistributeOperation_400, Functi
     IPCSkeleton::SetCallingTokenID(NATIVE_TOKEN);
     sptr<NotificationBundleOption> bundle = new NotificationBundleOption(TEST_DEFUALT_BUNDLE, NON_SYSTEM_APP_UID);
     sptr<NotificationRequest> request = new (std::nothrow) NotificationRequest();
-    request->SetDistributedCollaborate(true);
+    request->SetDistributedCollaborate(false);
     auto record = advancedNotificationService_->MakeNotificationRecord(request, bundle);
     advancedNotificationService_->AddToNotificationList(record);
     sptr<NotificationOperationInfo> operationInfo = new (std::nothrow) NotificationOperationInfo();