diff --git a/tests/system/shared/build_utils.py b/tests/system/shared/build_utils.py
index 30787224ad7..9f2ed42ccb6 100644
--- a/tests/system/shared/build_utils.py
+++ b/tests/system/shared/build_utils.py
@@ -57,7 +57,7 @@ def checkCompile():
     waitFor("len(str(output.plainText))>0",5000)
     if compileSucceeded(output.plainText):
         if os.getenv("SYSTEST_DEBUG") == "1":
-            test.log("Compile Output:\n%s" % output.plainText)
+            test.log("Compile Output:\n%s" % str(output.plainText))
         test.passes("Compile successful")
         return True
     else:
diff --git a/tests/system/suite_CCOM/tst_CCOM01/test.py b/tests/system/suite_CCOM/tst_CCOM01/test.py
index 516f9fd5b25..6c9101c3813 100755
--- a/tests/system/suite_CCOM/tst_CCOM01/test.py
+++ b/tests/system/suite_CCOM/tst_CCOM01/test.py
@@ -58,7 +58,7 @@ def main():
         compileOutput = waitForObject(":Qt Creator.Compile Output_Core::OutputWindow")
         if not test.verify(compileSucceeded(compileOutput.plainText),
                            "Verifying building of existing complex qt application."):
-            test.log(compileOutput.plainText)
+            test.log(str(compileOutput.plainText))
     # exit
     invokeMenuItem("File", "Exit")
 # no cleanup needed, as whole testing directory gets properly removed after test finished
diff --git a/tests/system/suite_SCOM/tst_SCOM01/test.py b/tests/system/suite_SCOM/tst_SCOM01/test.py
index c02b298e9f2..161dcbd3612 100644
--- a/tests/system/suite_SCOM/tst_SCOM01/test.py
+++ b/tests/system/suite_SCOM/tst_SCOM01/test.py
@@ -50,6 +50,6 @@ def main():
         compileOutput = waitForObject(":Qt Creator.Compile Output_Core::OutputWindow")
         if not test.verify(compileSucceeded(compileOutput.plainText),
                            "Verifying building of simple qt quick application."):
-            test.log(compileOutput.plainText)
+            test.log(str(compileOutput.plainText))
     # exit qt creator
     invokeMenuItem("File", "Exit")