diff --git a/test/unit/ui/stubs/app_stub.cpp b/test/unit/ui/stubs/app_stub.cpp
index 9b33e5e1..960972f3 100644
--- a/test/unit/ui/stubs/app_stub.cpp
+++ b/test/unit/ui/stubs/app_stub.cpp
@@ -21,7 +21,7 @@ CApplication::~CApplication()
 {
 }
 
-std::string CApplication::GetDataFilePath(DataDir /* dataDir */, const std::string& subpath)
+std::string CApplication::GetDataFilePath(DataDir /* dataDir */, const std::string& subpath) const
 {
     return subpath;
 }
@@ -36,7 +36,7 @@ CEventQueue* CApplication::GetEventQueue()
     return nullptr;
 }
 
-std::string CApplication::GetDataDirPath()
+std::string CApplication::GetDataDirPath() const
 {
     return "";
 }
@@ -46,7 +46,7 @@ Event CApplication::CreateUpdateEvent()
     return Event(EVENT_NULL);
 }
 
-char CApplication::GetLanguageChar()
+char CApplication::GetLanguageChar() const
 {
     return 'E';
 }