fix junit tests again

Author: timfel

mx.graalpython/mx_graalpython.py

@@ -182,13 +182,11 @@ def _dev_pythonhome():
 
 
 def punittest(ars):
-    if not ars:
-        args = ['--regex', r'(graal\.python)|(com\.oracle\.truffle\.tck\.tests)']
-    else:
-        args = []
-    args += ["-Dgraal.TruffleCompilationExceptionsAreFatal=false",
-             "-Dgraal.TruffleCompilationExceptionsArePrinted=true",
-             "-Dgraal.TrufflePerformanceWarningsAreFatal=false"]
+    args = ["-Dgraal.TruffleCompilationExceptionsAreFatal=false",
+            "-Dgraal.TruffleCompilationExceptionsArePrinted=true",
+            "-Dgraal.TrufflePerformanceWarningsAreFatal=false"]
+    if "--regex" not in ars:
+        args += ['--regex', r'(graal\.python)|(com\.oracle\.truffle\.tck\.tests)']
     args += ars
     with _pythonhome_context():
         mx_unittest.unittest(args)