diff --git a/tests/unittests/backup_sa/module_ipc/service_stub_test.cpp b/tests/unittests/backup_sa/module_ipc/service_stub_test.cpp
index dae7a960bc23e085f2a1f887ecb62fc9deb23e0b..4343caf165ce7d87165e6998589d1889f167a058 100644
--- a/tests/unittests/backup_sa/module_ipc/service_stub_test.cpp
+++ b/tests/unittests/backup_sa/module_ipc/service_stub_test.cpp
@@ -623,4 +623,41 @@ HWTEST_F(ServiceStubTest, SUB_backup_sa_ServiceStub_UpdateTimer_0100, testing::e
     }
     GTEST_LOG_(INFO) << "ServiceStubTest-end SUB_backup_sa_ServiceStub_UpdateTimer_0100";
 }
+
+/**
+ * @tc.number: SUB_backup_sa_ServiceStub_AppFileReady_0100
+ * @tc.name: SUB_backup_sa_ServiceStub_AppFileReady_0100
+ * @tc.desc: Test function of AppIncrementalFileReady interface for SUCCESS.
+ * @tc.size: MEDIUM
+ * @tc.type: FUNC
+ * @tc.level Level 0
+ * @tc.require: I6F3GV
+ */
+HWTEST_F(ServiceStubTest, SUB_backup_sa_ServiceStub_AppIncrementalFileReady_0100, testing::ext::TestSize.Level0)
+{
+    GTEST_LOG_(INFO) << "ServiceStubTest-begin SUB_backup_sa_ServiceStub_AppFileReady_0100";
+    try {
+        MockService service;
+        EXPECT_CALL(service, AppIncrementalFileReady(_, _, _, _)).WillOnce(Return(BError(BError::Codes::OK)));
+        MessageParcel data;
+        MessageParcel reply;
+        MessageOption option;
+
+        TestManager tm("ServiceStub_GetFd_0200");
+        std::string filePath = tm.GetRootDirCurTest().append(FILE_NAME);
+        UniqueFd fd(open(filePath.data(), O_RDONLY | O_CREAT, S_IRUSR | S_IWUSR));
+        UniqueFd manifestFD(open(filePath.data(), O_RDONLY | O_CREAT, S_IRUSR | S_IWUSR));
+
+        EXPECT_TRUE(data.WriteInterfaceToken(IService::GetDescriptor()));
+        EXPECT_TRUE(data.WriteString(FILE_NAME));
+        EXPECT_TRUE(data.WriteFileDescriptor(fd));
+        EXPECT_EQ(BError(BError::Codes::OK),
+                  service.OnRemoteRequest(static_cast<uint32_t>(IServiceInterfaceCode::SERVICE_CMD_APP_INCREMENTAL_FILE_READY),
+                                          data, reply, option));
+    } catch (...) {
+        EXPECT_TRUE(false);
+        GTEST_LOG_(INFO) << "ServiceStubTest-an exception occurred by AppIncrementalFileReady.";
+    }
+    GTEST_LOG_(INFO) << "ServiceStubTest-end SUB_backup_sa_ServiceStub_AppIncrementalFileReady_0100";
+}
 } // namespace OHOS::FileManagement::Backup
\ No newline at end of file
diff --git a/tests/unittests/backup_utils/b_error/b_error_test.cpp b/tests/unittests/backup_utils/b_error/b_error_test.cpp
index d48c401d7f3cfe0a1db5e3bb6ca29dcaecad66a0..227566426a37ec96c0d05fa5707cf6fff972eaf1 100644
--- a/tests/unittests/backup_utils/b_error/b_error_test.cpp
+++ b/tests/unittests/backup_utils/b_error/b_error_test.cpp
@@ -452,4 +452,30 @@ HWTEST_F(BErrorTest, b_error_int_0100, testing::ext::TestSize.Level0)
     EXPECT_EQ(result, 0);
     GTEST_LOG_(INFO) << "BErrorTest-end b_error_int_0100";
 }
+
+/**
+ * @tc.number: SUB_backup_b_error_GetCodeBtErrno_0100
+ * @tc.name: b_error_int_0100
+ * @tc.desc: Test function of GetRawCode interface for SUCCESS.
+ * @tc.size: MEDIUM
+ * @tc.type: FUNC
+ * @tc.level Level 0
+ * @tc.require: I6F3GV
+ */
+HWTEST_F(BErrorTest, b_error_GetCodeBtErrno_0100, testing::ext::TestSize.Level0)
+{
+    GTEST_LOG_(INFO) << "BErrorTest-begin b_error_GetCodeBtErrno_0100";
+    int errnosys = 0;
+    int ret = BError::GetCodeByErrno(errnosys);
+    EXPECT_EQ(ret, 0);
+
+    int errnosys1 = 123;
+    ret = BError::GetCodeByErrno(errnosys1);
+    EXPECT_EQ(ret, BError::BackupErrorCode::E_IO);
+
+    int errnosys2 = 13900005;
+    ret = BError::GetCodeByErrno(errnosys2);
+    EXPECT_EQ(ret, BError::BackupErrorCode::E_IO);
+    GTEST_LOG_(INFO) << "BErrorTest-end b_error_GetCodeBtErrno_0100";
+}
 } // namespace OHOS::FileManagement::Backup
\ No newline at end of file
diff --git a/tests/unittests/backup_utils/b_json/b_json_entity_extension_config_test.cpp b/tests/unittests/backup_utils/b_json/b_json_entity_extension_config_test.cpp
index 937245c1a69843d10747136cb6af89dbfba5a67e..a615fb78b423f7ddd3a7117040004d5e1f5a6b01 100644
--- a/tests/unittests/backup_utils/b_json/b_json_entity_extension_config_test.cpp
+++ b/tests/unittests/backup_utils/b_json/b_json_entity_extension_config_test.cpp
@@ -994,9 +994,15 @@ HWTEST_F(BJsonEntityExtensionConfigTest, b_json_entity_extension_config_3600, te
         auto cache3 = cachedEntity3.Structuralize();
         supportScene = cache3.GetSupportScene();
         EXPECT_EQ(supportScene, "true");
+
+        Json::Value jv(Json::nullValue);
+        BJsonCachedEntity<BJsonEntityExtensionConfig> cachedEntity4(jv);
+        auto cache4 = cachedEntity4.Structuralize();
+        supportScene = cache4.GetExtraInfo();
+        EXPECT_EQ(supportScene, "");
     } catch (...) {
         EXPECT_TRUE(false);
-        GTEST_LOG_(INFO) << "BJsonEntityExtensionConfigTest-an exception occurred by GetRestoreDeps.";
+        GTEST_LOG_(INFO) << "BJsonEntityExtensionConfigTest-an exception occurred by GetSupportScene.";
     }
     GTEST_LOG_(INFO) << "BJsonEntityExtensionConfigTest-end b_json_entity_extension_config_3600";
 }
@@ -1031,9 +1037,15 @@ HWTEST_F(BJsonEntityExtensionConfigTest, b_json_entity_extension_config_3700, te
         auto cache3 = cachedEntity3.Structuralize();
         auto extraInfo3 = cache3.GetExtraInfo();
         EXPECT_TRUE(extraInfo3.isObject());
+
+        Json::Value jv(Json::nullValue);
+        BJsonCachedEntity<BJsonEntityExtensionConfig> cachedEntity4(jv);
+        auto cache4 = cachedEntity4.Structuralize();
+        auto extraInfo4 = cache4.GetExtraInfo();
+        EXPECT_TRUE(extraInfo2.isNull());
     } catch (...) {
         EXPECT_TRUE(false);
-        GTEST_LOG_(INFO) << "BJsonEntityExtensionConfigTest-an exception occurred by GetRestoreDeps.";
+        GTEST_LOG_(INFO) << "BJsonEntityExtensionConfigTest-an exception occurred by GetExtraInfo.";
     }
     GTEST_LOG_(INFO) << "BJsonEntityExtensionConfigTest-end b_json_entity_extension_config_3700";
 }