diff --git a/routing/routing_tests/turns_sound_test.cpp b/routing/routing_tests/turns_sound_test.cpp
index 9d3eee53eb..698e8e3c29 100644
--- a/routing/routing_tests/turns_sound_test.cpp
+++ b/routing/routing_tests/turns_sound_test.cpp
@@ -503,6 +503,19 @@ UNIT_TEST(TurnsSoundRoundaboutTurnTest)
   turnSound.GenerateTurnSound(turns9, turnNotifications);
   TEST_EQUAL(turnNotifications, expectedNotification9, ());
 }
+
+UNIT_TEST(GetJsonBufferTest)
+{
+  string const localeNameEn = "en";
+  string jsonBuffer;
+  TEST(GetJsonBuffer(platform::TextSource::TtsSound, localeNameEn, jsonBuffer), ());
+  TEST(!jsonBuffer.empty(), ());
+
+  string const localeNameRu = "ru";
+  jsonBuffer.clear();
+  TEST(GetJsonBuffer(platform::TextSource::TtsSound, localeNameRu, jsonBuffer), ());
+  TEST(!jsonBuffer.empty(), ());
+}
 }  // namespace sound
 }  // namespace turns
 }  // namespace routing
diff --git a/routing/turns_tts_text.cpp b/routing/turns_tts_text.cpp
index 2cd97f735f..cdd02af9c5 100644
--- a/routing/turns_tts_text.cpp
+++ b/routing/turns_tts_text.cpp
@@ -76,7 +76,7 @@ string GetTtsText::GetTextById(string const & textId) const
   if (m_getCurLang == nullptr)
   {
     ASSERT(false, ());
-    return "";
+    return string();
   }
   return (*m_getCurLang)(textId);
 }