diff --git a/tests/src/core/qgsrenderchecker.cpp b/tests/src/core/qgsrenderchecker.cpp
index 3d6f61680f6..8c235716864 100644
--- a/tests/src/core/qgsrenderchecker.cpp
+++ b/tests/src/core/qgsrenderchecker.cpp
@@ -116,7 +116,7 @@ bool QgsRenderChecker::runTest( QString theTestName )
 
   if (mMatchTarget!= myPixelCount )
   {
-    qDebug ("Test image and result image for " + theTestName + " are different - FAILING!");
+    qDebug ( QString("Test image and result image for %1 are different - FAILING!").arg(theTestName).toLocal8Bit() );
     mReport += "<tr><td colspan=3>";
     mReport += "<font color=red>Expected image and result image for " + theTestName + " are different dimensions - FAILING!</font>";
     mReport += "</td></tr>";
diff --git a/tests/src/core/testqgsgeometry.cpp b/tests/src/core/testqgsgeometry.cpp
index 8d645d66327..f455f6d81f6 100644
--- a/tests/src/core/testqgsgeometry.cpp
+++ b/tests/src/core/testqgsgeometry.cpp
@@ -159,7 +159,7 @@ void TestQgsGeometry::unionCheck()
   for (int i = 0; i < myPolyline.size(); i++)
   {
     QgsPoint myPoint = myPolyline.at(i);
-    qDebug(myPoint.stringRep());
+    qDebug(myPoint.stringRep().toLocal8Bit());
   }
   delete mypUnionGeometry;
 }
diff --git a/tests/src/core/testqgsmaprender.cpp b/tests/src/core/testqgsmaprender.cpp
index 372c1aa2fd9..9da9a066806 100644
--- a/tests/src/core/testqgsmaprender.cpp
+++ b/tests/src/core/testqgsmaprender.cpp
@@ -104,7 +104,7 @@ void TestQgsMapRender::initTestCase()
   QString myQmlFileName = myTestDataDir +  "maprender_testdata.qml";
   QFile::copy(myQmlFileName, myTmpDir + "maprender_testdata.qml");
   qDebug ( "Checking test dataset exists...");
-  qDebug ( myFileName );
+  qDebug ( myFileName.toLocal8Bit() );
   if (!QFile::exists(myFileName))
   {
     qDebug ( "Creating test dataset: ");