Index: /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py
===================================================================
--- /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py	(revision 61553)
+++ /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py	(revision 61554)
@@ -784,5 +784,5 @@
                 sScreenHash = oCaseFile.getScreenshotSha256(oFile);
                 if sScreenHash is not None:
-                    sScreenHash = sScreenHash.tolower();
+                    sScreenHash = sScreenHash.lower();
                     self.vprint('%s  %s' % ( sScreenHash, oFile.sFile,));
         if sVMLog is not None and investigateLogSet() is True: