diff --git a/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.cpp b/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.cpp
index 8bd10a0d6ab1c2d8d13f96c9421ba6070aff75b7..adbeaf1764a60ceb9fdc8f9f6240ae3a5af8ef04 100644
--- a/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.cpp
+++ b/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.cpp
@@ -15,14 +15,25 @@
 
 #include "backupsa_fuzzer.h"
 
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+
+#include <climits>
 #include "message_parcel.h"
+#include "service_stub.h"
 #include "service.h"
-#include "service_client.h"
+#include "securec.h"
+#include "system_ability.h"
+
+#include "filemgmt_libhilog.h"
 
-namespace OHOS {
 using namespace OHOS::FileManagement::Backup;
+
+namespace OHOS {
 constexpr size_t U32_AT_SIZE = 4;
-constexpr uint8_t MAX_CALL_TRANSACTION = 40;
+constexpr uint8_t MAX_CALL_TRANSACTION = 24;
+constexpr int32_t SERVICE_ID = 5203;
 
 uint32_t GetU32Data(const char* ptr)
 {
@@ -36,7 +47,7 @@ bool BackupSaFuzzTest(const uint8_t *data, size_t size)
         return true;
     }
 
-    Service* service = static_cast<Service*>(ServiceClient::GetInstance()->AsObject().GetRefPtr());
+    sptr service = sptr(new Service(SERVICE_ID));
     uint32_t code = GetU32Data(reinterpret_cast<const char*>(data));
     if (code == 0) {
         return true;
diff --git a/test/fuzztest/backupservicestub_fuzzer/backupservicestub_fuzzer.cpp b/test/fuzztest/backupservicestub_fuzzer/backupservicestub_fuzzer.cpp
index 94f3c897abbe50cc1f8757bed06c06b66b165a84..6b2c9cd2bd2c941ecd1b99aed4ba28be434fe3c2 100644
--- a/test/fuzztest/backupservicestub_fuzzer/backupservicestub_fuzzer.cpp
+++ b/test/fuzztest/backupservicestub_fuzzer/backupservicestub_fuzzer.cpp
@@ -670,26 +670,6 @@ bool CmdUpdateSendRateFuzzTest(sptr<Service> service, const uint8_t *data, size_
     }
     return true;
 }
-
-bool CmdGetBackupDataSizeFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
-{
-    if (data == nullptr || size < sizeof(int32_t) + sizeof(int32_t)) {
-        return true;
-    }
-
-    MessageParcel msg;
-    MessageParcel reply;
-    MessageOption option;
-    uint32_t code = static_cast<uint32_t>(IServiceIpcCode::COMMAND_GET_BACKUP_DATA_SIZE);
-
-    try {
-        msg.WriteBuffer(data, size);
-        service->OnRemoteRequest(code, msg, reply, option);
-    } catch (OHOS::FileManagement::Backup::BError &err) {
-        // Only filter BError errors, Other results are not expected.
-    }
-    return true;
-}
 } // namespace OHOS
 
 /* Fuzzer entry point */
@@ -728,7 +708,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
         CmdGetBackupInfoFuzzTest(service, data, size);
         CmdUpdateTimerFuzzTest(service, data, size);
         CmdUpdateSendRateFuzzTest(service, data, size);
-        CmdGetBackupDataSizeFuzzTest(service, data, size);
     } catch (OHOS::FileManagement::Backup::BError &err) {
         // Only filter BError errors, Other results are not expected.
     }