diff --git a/App/src/TestFunctionalTests.cpp b/App/src/TestFunctionalTests.cpp
index ab3a8fb6e7063cb1ab4107eb53e0b34176c5cfaa..19a24967d04f8d5d98c598d924aad09e0f86c453 100644
--- a/App/src/TestFunctionalTests.cpp
+++ b/App/src/TestFunctionalTests.cpp
@@ -20,7 +20,7 @@ void TestFunctionalTests::execute()
 
         IntensityDataIOFactory::writeIntensityData(*test->getSimulation()->getOutputData(), "a.int");
 
-        double diff = IntensityDataFunctions::GetRelativeDifference(*test->getResult(), *test->getReference());
+        double diff = IntensityDataFunctions::getRelativeDifference(*test->getResult(), *test->getReference());
         std::cout << "diff: " << diff << std::endl;
 
         IsGISAXSTools::drawOutputDataComparisonResults( *test->getResult(),