diff --git a/frameworks/native/cloudsync_kit_inner/src/cloud_sync_manager_impl.cpp b/frameworks/native/cloudsync_kit_inner/src/cloud_sync_manager_impl.cpp
index 3d9545568c026cb68a501eba539393658b73e4a0..9d2967e34676fef1859cd4223ea8b993dea57d50 100644
--- a/frameworks/native/cloudsync_kit_inner/src/cloud_sync_manager_impl.cpp
+++ b/frameworks/native/cloudsync_kit_inner/src/cloud_sync_manager_impl.cpp
@@ -814,7 +814,12 @@ static std::string GetThumbsPath(const std::string& path)
 {
     const string str = "files/";
     size_t len = str.size() - 1;
-    std::string newPath = "/storage/media/cloud/files/.thumbs" + path.substr(path.find(str) + len); // 待删除的文件路径
+    auto found = path.find(str);
+    if (found == string::npos) {
+        LOGE("\"files/\" not found in path");
+        return "";
+    }
+    std::string newPath = "/storage/media/cloud/files/.thumbs" + path.substr(found + len); // 待删除的文件路径
     return newPath;
 }
 
@@ -822,7 +827,12 @@ static std::string GetMediaPath(const std::string& path)
 {
     const string str = "storage/";
     size_t len = str.size() - 1;
-    std::string newPath = "/storage/media" + path.substr(path.find(str) + len);
+    auto found = path.find(str);
+    if (found == string::npos) {
+        LOGE("\"storage/\" not found in path");
+        return "";
+    }
+    std::string newPath = "/storage/media" + path.substr(found + len);
     return newPath;
 }
 
diff --git a/interfaces/kits/js/cloudfilesync/download_callback_middle_napi.cpp b/interfaces/kits/js/cloudfilesync/download_callback_middle_napi.cpp
index 76c86cc16dec5d77f58a0fb24be2330926d461f6..13623fb2e67be5fee58447bac00e2253652f9ca4 100644
--- a/interfaces/kits/js/cloudfilesync/download_callback_middle_napi.cpp
+++ b/interfaces/kits/js/cloudfilesync/download_callback_middle_napi.cpp
@@ -64,7 +64,7 @@ void CloudDlCallbackMiddleNapi::OnDownloadProcess(const DownloadProgressObj &pro
     }
     std::shared_ptr<CloudDlCallbackMiddleNapi> callbackImpl = shared_from_this();
     napi_status status = napi_send_event(
-        callbackImpl->env_,
+        env_,
         [fileCacheInfo, callbackImpl]() mutable {
             if (fileCacheInfo == nullptr || callbackImpl == nullptr) {
                 LOGE("Failed to callback, is callbackImpl null: %{public}d", (callbackImpl == nullptr));
diff --git a/services/cloudfiledaemon/include/cloud_disk/io_message_listener.h b/services/cloudfiledaemon/include/cloud_disk/io_message_listener.h
index 655fe644aa1891991644c85dde2225236652e8f0..e7e2f72850ec89a7e184e1218b15ff03a78b9d74 100644
--- a/services/cloudfiledaemon/include/cloud_disk/io_message_listener.h
+++ b/services/cloudfiledaemon/include/cloud_disk/io_message_listener.h
@@ -53,7 +53,6 @@ private:
     std::atomic<bool> isThreadRunning{false};
     std::thread ioThread;
     std::mutex sleepMutex;
-    std::mutex cvMute;
     std::condition_variable sleepCv;
     std::map<std::string, int32_t> bundleTimeMap;
     IoData currentData;
diff --git a/services/cloudfiledaemon/src/cloud_disk/io_message_listener.cpp b/services/cloudfiledaemon/src/cloud_disk/io_message_listener.cpp
index 8bf0b017ab9a40da677bd3a1cd3c651790bf754b..6848656f7f104002eb3fc982ebe0ccbdb5bbcd17 100644
--- a/services/cloudfiledaemon/src/cloud_disk/io_message_listener.cpp
+++ b/services/cloudfiledaemon/src/cloud_disk/io_message_listener.cpp
@@ -175,8 +175,10 @@ void IoMessageManager::OnReceiveEvent(const AppExecFwk::AppStateData &appStateDa
         }
         if (appStateData.state == TYPE_BACKGROUND) {
             if (ioThread.joinable()) {
-                lock_guard<mutex> lock(cvMute);
-                isThreadRunning.store(false);
+                {
+                    lock_guard<mutex> lock(sleepMutex);
+                    isThreadRunning.store(false);
+                }
                 sleepCv.notify_all();
                 ioThread.join();
                 ioThread = thread();
diff --git a/test/unittests/cloudsync_api/cloudsync_impl/BUILD.gn b/test/unittests/cloudsync_api/cloudsync_impl/BUILD.gn
index 5b66c8cd8b1ccf0b5a0b039a404b6a0ec237862c..5bbbe67a01d5701114ee2d8bf57376ad5dc15aad 100644
--- a/test/unittests/cloudsync_api/cloudsync_impl/BUILD.gn
+++ b/test/unittests/cloudsync_api/cloudsync_impl/BUILD.gn
@@ -79,13 +79,13 @@ ohos_unittest("cloud_sync_manager_impl_test") {
   module_out_path = "dfs_service/dfs_service"
 
   sources = [
-    "${distributedfile_path}/frameworks/native/cloudsync_kit_inner/src/cloud_sync_manager_impl.cpp",
     "${distributedfile_path}/test/mock/system_ability_manager_client_mock.cpp",
     "cloud_sync_manager_impl_test.cpp",
   ]
 
   include_dirs = [
     "${distributedfile_path}/frameworks/native/cloudsync_kit_inner/include",
+    "${distributedfile_path}/frameworks/native/cloudsync_kit_inner/src",
     "${distributedfile_path}/interfaces/inner_api/native/cloudsync_kit_inner",
     "${distributedfile_path}/test/mock",
     "${distributedfile_path}/test/mock/ipc",
diff --git a/test/unittests/cloudsync_api/cloudsync_impl/cloud_sync_manager_impl_test.cpp b/test/unittests/cloudsync_api/cloudsync_impl/cloud_sync_manager_impl_test.cpp
index ec2f9db67406f21406e24c26ec08faa322b22213..d6e144219a2e3d36c25f52a7f0df175efd52de69 100644
--- a/test/unittests/cloudsync_api/cloudsync_impl/cloud_sync_manager_impl_test.cpp
+++ b/test/unittests/cloudsync_api/cloudsync_impl/cloud_sync_manager_impl_test.cpp
@@ -20,7 +20,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
-#include "cloud_sync_manager_impl.h"
+#include "cloud_sync_manager_impl.cpp"
 #include "dfs_error.h"
 #include "icloud_sync_service.h"
 #include "iservice_registry.h"
@@ -36,8 +36,6 @@ namespace fs = std::filesystem;
 using namespace testing::ext;
 using namespace testing;
 using namespace std;
-constexpr int32_t MAX_DENTRY_FILE_SIZE = 500;
-constexpr int32_t MAX_FILE_CACHE_NUM = 400;
 
 class CloudSyncManagerImplTest : public testing::Test {
 public:
@@ -1371,5 +1369,45 @@ HWTEST_F(CloudSyncManagerImplTest, ClearFileConflictTest001, TestSize.Level1)
     }
     GTEST_LOG_(INFO) << "ClearFileConflictTest001 End";
 }
+
+/*
+ * @tc.name: GetThumbsPath
+ * @tc.desc: Verify the GetThumbsPath function
+ * @tc.type: FUNC
+ * @tc.require: ICGORT
+ */
+HWTEST_F(CloudSyncManagerImplTest, GetThumbsPathTest001, TestSize.Level1)
+{
+    GTEST_LOG_(INFO) << "GetThumbsPathTest001 Start";
+    try {
+        string inputPath = "/storage/cloud/100/data";
+        auto ret = GetThumbsPath(inputPath);
+        EXPECT_EQ(ret, "");
+    } catch (...) {
+        EXPECT_TRUE(false);
+        GTEST_LOG_(INFO) << " GetThumbsPathTest001 FAILED";
+    }
+    GTEST_LOG_(INFO) << "GetThumbsPathTest001 End";
+}
+
+/*
+ * @tc.name: GetMediaPath
+ * @tc.desc: Verify the GetMediaPath function
+ * @tc.type: FUNC
+ * @tc.require: ICGORT
+ */
+HWTEST_F(CloudSyncManagerImplTest, GetMediaPathTest001, TestSize.Level1)
+{
+    GTEST_LOG_(INFO) << "GetMediaPathTest001 Start";
+    try {
+        string inputPath = "/data/service/el2/100/hmdfs/account/files";
+        auto ret = GetMediaPath(inputPath);
+        EXPECT_EQ(ret, "");
+    } catch (...) {
+        EXPECT_TRUE(false);
+        GTEST_LOG_(INFO) << " GetMediaPathTest001 FAILED";
+    }
+    GTEST_LOG_(INFO) << "GetMediaPathTest001 End";
+}
 } // namespace FileManagement::CloudSync
 } // namespace OHOS
\ No newline at end of file