diff --git a/routing/routing_tests/turns_sound_test.cpp b/routing/routing_tests/turns_sound_test.cpp
index 05e6c0cfa6..feece5f9d6 100644
--- a/routing/routing_tests/turns_sound_test.cpp
+++ b/routing/routing_tests/turns_sound_test.cpp
@@ -7,14 +7,19 @@
 
 namespace
 {
-using namespace location;
-using namespace routing::turns;
-using namespace routing::turns::sound;
-
 // A error to compare two double after conversion feet to meters.
 double const kEps = 1.;
 // A error to compare two doubles which are almost equal.
 double const kSmallEps = .001;
+}  // namespace
+
+namespace routing
+{
+namespace turns
+{
+namespace sound
+{
+using namespace location;
 
 UNIT_TEST(TurnNotificationSettingsMetersTest)
 {
@@ -96,8 +101,8 @@ UNIT_TEST(TurnsSoundMetersTest)
       \"in_600_meters\":\"In 600 meters.\",\
       \"make_a_right_turn\":\"Make a right turn.\"\
       }";
-  turnSound.SetLocaleWithJson(engShortJson);
-  turnSound.SetNotificationTimeSecond(20);
+  turnSound.m_getTtsText.ForTestingSetLocaleWithJson(engShortJson);
+  turnSound.m_settings.ForTestingSetNotificationTimeSecond(20);
 
   turnSound.Reset();
   turnSound.SetSpeedMetersPerSecond(30.);
@@ -179,8 +184,8 @@ UNIT_TEST(TurnsSoundMetersTwoTurnsTest)
       \"make_a_sharp_right_turn\":\"Make a sharp right turn.\",\
       \"enter_the_roundabout\":\"Enter the roundabout.\"\
       }";
-  turnSound.SetLocaleWithJson(engShortJson);
-  turnSound.SetNotificationTimeSecond(20);
+  turnSound.m_getTtsText.ForTestingSetLocaleWithJson(engShortJson);
+  turnSound.m_settings.ForTestingSetNotificationTimeSecond(20);
 
   turnSound.Reset();
   turnSound.SetSpeedMetersPerSecond(35.);
@@ -243,8 +248,8 @@ UNIT_TEST(TurnsSoundFeetTest)
       \"in_2000_feet\":\"In 2000 feet.\",\
       \"enter_the_roundabout\":\"Enter the roundabout.\"\
       }";
-  turnSound.SetLocaleWithJson(engShortJson);
-  turnSound.SetNotificationTimeSecond(20);
+  turnSound.m_getTtsText.ForTestingSetLocaleWithJson(engShortJson);
+  turnSound.m_settings.ForTestingSetNotificationTimeSecond(20);
 
   turnSound.Reset();
   turnSound.SetSpeedMetersPerSecond(30.);
@@ -308,4 +313,6 @@ UNIT_TEST(TurnsSoundFeetTest)
 
   TEST(turnSound.IsEnabled(), ());
 }
-}  // namespace
+}  // namespace sound
+}  // namespace turns
+}  // namespace routing
diff --git a/routing/routing_tests/turns_tts_text_tests.cpp b/routing/routing_tests/turns_tts_text_tests.cpp
index ce6e8cdc79..6aef4b4dc0 100644
--- a/routing/routing_tests/turns_tts_text_tests.cpp
+++ b/routing/routing_tests/turns_tts_text_tests.cpp
@@ -85,13 +85,13 @@ UNIT_TEST(GetTtsTextTest)
                                   LengthUnits::Meters);
   Notification const notifiation4(0, 0, true, TurnDirection::TurnLeft, LengthUnits::Meters);
 
-  getTtsText.SetLocaleWithJson(engShortJson);
+  getTtsText.ForTestingSetLocaleWithJson(engShortJson);
   TEST_EQUAL(getTtsText(notifiation1), "In 500 meters. Make a right turn.", ());
   TEST_EQUAL(getTtsText(notifiation2), "In 300 meters. Make a left turn.", ());
   TEST_EQUAL(getTtsText(notifiation3), "You have reached the destination.", ());
   TEST_EQUAL(getTtsText(notifiation4), "Then. Make a left turn.", ());
 
-  getTtsText.SetLocaleWithJson(rusShortJson);
+  getTtsText.ForTestingSetLocaleWithJson(rusShortJson);
   TEST_EQUAL(getTtsText(notifiation1), "Через 500 метров. Поворот направо.", ());
   TEST_EQUAL(getTtsText(notifiation2), "Через 300 метров. Поворот налево.", ());
   TEST_EQUAL(getTtsText(notifiation3), "Вы достигли конца маршрута.", ());
diff --git a/routing/turns_sound.hpp b/routing/turns_sound.hpp
index a20359b573..27f50bc04d 100644
--- a/routing/turns_sound.hpp
+++ b/routing/turns_sound.hpp
@@ -33,6 +33,10 @@ string DebugPrint(PronouncedNotification const notificationProgress);
 /// and relevant speed.
 class TurnsSound
 {
+  friend void UnitTest_TurnsSoundMetersTest();
+  friend void UnitTest_TurnsSoundMetersTwoTurnsTest();
+  friend void UnitTest_TurnsSoundFeetTest();
+
   /// m_enabled == true when tts is turned on.
   /// Important! Clients (iOS/Android) implies that m_enabled is false by default.
   bool m_enabled;
@@ -69,10 +73,6 @@ public:
   inline LengthUnits GetLengthUnits() const { return m_settings.GetLengthUnits(); }
   inline void SetLocale(string const & locale) { m_getTtsText.SetLocale(locale); }
   inline string GetLocale() const { return m_getTtsText.GetLocale(); }
-  /// SetLocaleWithJson is used for writing unit tests only.
-  void SetLocaleWithJson(string const & jsonBuffer) { m_getTtsText.SetLocaleWithJson(jsonBuffer); }
-  /// SetNotificationTimeSecond is used for writing unit tests only.
-  void SetNotificationTimeSecond(uint32_t time) { m_settings.SetNotificationTimeSecond(time); }
   void SetSpeedMetersPerSecond(double speed);
 
    /// \brief GenerateTurnSound updates information about the next turn notification.
diff --git a/routing/turns_sound_settings.hpp b/routing/turns_sound_settings.hpp
index 904d4effe1..74fd7ebf25 100644
--- a/routing/turns_sound_settings.hpp
+++ b/routing/turns_sound_settings.hpp
@@ -72,8 +72,7 @@ public:
   inline void SetLengthUnits(LengthUnits units) { m_lengthUnits = units; }
   double ConvertMetersPerSecondToUnitsPerSecond(double speedInMetersPerSecond) const;
   double ConvertUnitsToMeters(double distanceInUnits) const;
-  /// SetNotificationTimeSecond is used for writing unit tests only.
-  void SetNotificationTimeSecond(uint32_t time) { m_timeSeconds = time; }
+  void ForTestingSetNotificationTimeSecond(uint32_t time) { m_timeSeconds = time; }
 };
 
 /// \brief The Notification struct contains all the information about the next sound
diff --git a/routing/turns_tts_text.cpp b/routing/turns_tts_text.cpp
index 44caafbbae..3c43db3441 100644
--- a/routing/turns_tts_text.cpp
+++ b/routing/turns_tts_text.cpp
@@ -40,7 +40,7 @@ void GetTtsText::SetLocale(string const & locale)
   ASSERT(m_getCurLang, ());
 }
 
-void GetTtsText::SetLocaleWithJson(string const & jsonBuffer)
+void GetTtsText::ForTestingSetLocaleWithJson(string const & jsonBuffer)
 {
   m_getCurLang.reset(new platform::GetTextById(jsonBuffer));
   ASSERT(m_getCurLang && m_getCurLang->IsValid(), ());
diff --git a/routing/turns_tts_text.hpp b/routing/turns_tts_text.hpp
index a160d27a05..26a4df1a54 100644
--- a/routing/turns_tts_text.hpp
+++ b/routing/turns_tts_text.hpp
@@ -25,8 +25,7 @@ public:
   /// TODO(vbykoianko) Check if locale is available. If not use default (en) locale.
   void SetLocale(string const & locale);
   inline string GetLocale() const { return m_locale; }
-  /// SetLocaleWithJson is used for writing unit tests only.
-  void SetLocaleWithJson(string const & jsonBuffer);
+  void ForTestingSetLocaleWithJson(string const & jsonBuffer);
 
 private:
   string GetTextById(string const & textId) const;