Index: gc_core/py/lang_core/tests_core.py
==================================================================
--- gc_core/py/lang_core/tests_core.py
+++ gc_core/py/lang_core/tests_core.py
@@ -121,11 +121,11 @@
             sRuleId = sRuleId.rstrip("0123456789")
             if sOpt != "@@@@" and sRuleId not in self._aTestedRules and not re.search("^[0-9]+[sp]$|^[pd]_", sRuleId):
                 aUntestedRules.add(f"{sLineId}/{sRuleId}")
         if aUntestedRules:
             print()
-            for sRule in aUntestedRules:
+            for sRule in sorted(aUntestedRules):
                 echo(sRule)
             echo("  [{} untested rules]".format(len(aUntestedRules)))
 
     def _splitTestLine (self, sLine):
         sText, sSugg = sLine.split("->>")