diff --git a/services/src/ui_appearance_ability.cpp b/services/src/ui_appearance_ability.cpp
index 59d5a5172769d8be1607c365238e58f23526a622..40b6dc93971b25392252bf021d1f51c68557b326 100644
--- a/services/src/ui_appearance_ability.cpp
+++ b/services/src/ui_appearance_ability.cpp
@@ -544,7 +544,7 @@ ErrCode UiAppearanceAbility::SetDarkMode(int32_t mode, int32_t& funcResult)
     if (!isCallingPerm) {
         LOGE("permission verification failed");
         funcResult = PERMISSION_ERR;
-        return funcResult;
+        return SUCCEEDED;
     }
 
     auto userId = GetCallingUserId();
@@ -558,11 +558,11 @@ ErrCode UiAppearanceAbility::SetDarkMode(int32_t mode, int32_t& funcResult)
     }
     if (darkMode != currentDarkMode) {
         funcResult = OnSetDarkMode(userId, darkMode);
-        return funcResult;
+        return SUCCEEDED;
     } else {
         LOGW("current color mode is %{public}d, no need to change", darkMode);
         funcResult = SYS_ERR;
-        return funcResult;
+        return SUCCEEDED;
     }
 }
 
@@ -635,16 +635,16 @@ ErrCode UiAppearanceAbility::SetFontScale(const std::string& fontScale, int32_t&
     if (!isCallingPerm) {
         LOGE("permission verification failed");
         funcResult = PERMISSION_ERR;
-        return funcResult;
+        return SUCCEEDED;
     }
     if (!fontScale.empty()) {
         funcResult = OnSetFontScale(GetCallingUserId(), fontScale);
-        return funcResult;
+        return SUCCEEDED;
     } else {
         LOGE("current fontScale is empty!");
     }
     funcResult = SYS_ERR;
-    return funcResult;
+    return SUCCEEDED;
 }
 
 ErrCode UiAppearanceAbility::GetFontScale(std::string& fontScale, int32_t& funcResult)
@@ -660,7 +660,7 @@ ErrCode UiAppearanceAbility::GetFontScale(std::string& fontScale, int32_t& funcR
     }
     LOGD("get font scale :%{public}s", fontScale.c_str());
     funcResult = SUCCEEDED;
-    return funcResult;
+    return SUCCEEDED;
 }
 
 int32_t UiAppearanceAbility::OnSetFontWeightScale(const int32_t userId, const std::string& fontWeightScale)
@@ -700,16 +700,16 @@ ErrCode UiAppearanceAbility::SetFontWeightScale(const std::string& fontWeightSca
     if (!isCallingPerm) {
         LOGE("permission verification failed");
         funcResult = PERMISSION_ERR;
-        return funcResult;
+        return SUCCEEDED;
     }
     if (!fontWeightScale.empty()) {
         funcResult = OnSetFontWeightScale(GetCallingUserId(), fontWeightScale);
-        return funcResult;
+        return SUCCEEDED;
     } else {
         LOGE("current fontWeightScale is empty!");
     }
     funcResult = SYS_ERR;
-    return funcResult;
+    return SUCCEEDED;
 }
 
 ErrCode UiAppearanceAbility::GetFontWeightScale(std::string& fontWeightScale, int32_t& funcResult)
@@ -726,7 +726,7 @@ ErrCode UiAppearanceAbility::GetFontWeightScale(std::string& fontWeightScale, in
 
     LOGD("get font weight scale :%{public}s", fontWeightScale.c_str());
     funcResult = SUCCEEDED;
-    return funcResult;
+    return SUCCEEDED;
 }
 
 void UiAppearanceAbility::UpdateSmartGestureModeCallback(bool isAutoMode, int32_t userId)
diff --git a/test/unittest/ui_appearance_test.cpp b/test/unittest/ui_appearance_test.cpp
index 437b5a076225c1944297597d442f9bdffc6b084c..6e283a120563aefc93c722c9ed1f9f9b193efc92 100644
--- a/test/unittest/ui_appearance_test.cpp
+++ b/test/unittest/ui_appearance_test.cpp
@@ -101,13 +101,13 @@ HWTEST_F(DarkModeTest, ui_appearance_test_001, TestSize.Level0)
     auto test = DarkModeTest::GetUiAppearanceAbilityTest();
     int32_t result = -1;
     test->SetDarkMode(DarkMode::ALWAYS_DARK, result);
-    EXPECT_EQ(result, 0);
+    EXPECT_EQ(result, UiAppearanceAbilityErrCode::SUCCEEDED);
     int32_t mode = -1;
     test->GetDarkMode(mode);
     EXPECT_EQ(mode, DarkMode::ALWAYS_DARK);
 
     test->SetDarkMode(DarkMode::ALWAYS_LIGHT, result);
-    EXPECT_EQ(result, 0);
+    EXPECT_EQ(result, UiAppearanceAbilityErrCode::SUCCEEDED);
     test->GetDarkMode(mode);
     EXPECT_EQ(mode, DarkMode::ALWAYS_LIGHT);
 }
@@ -283,5 +283,49 @@ HWTEST_F(DarkModeTest, ui_appearance_test_009, TestSize.Level0)
     bool ret = test->BackGroundAppColorSwitch(nullptr, 0);
     EXPECT_EQ(false, ret);
 }
+
+/**
+ * @tc.name: ui_appearance_test_010
+ * @tc.desc: Test SetFontScale and GetFontScale APIs when repeatedly setting font scale.
+ * @tc.type: FUNC
+ */
+HWTEST_F(DarkModeTest, ui_appearance_test_010, TestSize.Level0)
+{
+    LOGI("Test SetFontScale and GetFontScale APIs when repeatedly setting font scale.");
+
+    auto test = DarkModeTest::GetUiAppearanceAbilityTest();
+    int32_t result = -1;
+    test->SetFontScale("", result);
+    EXPECT_EQ(result, UiAppearanceAbilityErrCode::SYS_ERR);
+    std::string scale = "1";
+    test->SetFontScale(scale, result);
+    EXPECT_EQ(result, UiAppearanceAbilityErrCode::SUCCEEDED);
+    std::string scaleGet;
+    test->GetFontScale(scaleGet, result);
+    ASSERT_EQ(result, UiAppearanceAbilityErrCode::SUCCEEDED);
+    EXPECT_EQ(scale, scaleGet);
+}
+
+/**
+ * @tc.name: ui_appearance_test_011
+ * @tc.desc: Test SetFontWeightScale and GetFontWeightScale APIs when repeatedly setting font weight scale.
+ * @tc.type: FUNC
+ */
+HWTEST_F(DarkModeTest, ui_appearance_test_011, TestSize.Level0)
+{
+    LOGI("Test SetFontWeightScale and GetFontWeightScale APIs when repeatedly setting font weight scale.");
+
+    auto test = DarkModeTest::GetUiAppearanceAbilityTest();
+    int32_t result = -1;
+    test->SetFontWeightScale("", result);
+    EXPECT_EQ(result, UiAppearanceAbilityErrCode::SYS_ERR);
+    std::string scale = "1";
+    test->SetFontWeightScale(scale, result);
+    EXPECT_EQ(result, UiAppearanceAbilityErrCode::SUCCEEDED);
+    std::string scaleGet;
+    test->GetFontWeightScale(scaleGet, result);
+    ASSERT_EQ(result, UiAppearanceAbilityErrCode::SUCCEEDED);
+    EXPECT_EQ(scale, scaleGet);
+}
 } // namespace ArkUi::UiAppearance
 } // namespace OHOS