--- a/tests/run-tests.py	Mon Nov 20 23:23:10 2017 -0800
+++ b/tests/run-tests.py	Fri Dec 01 12:27:28 2017 -0800
@@ -1218,9 +1218,7 @@
 
     def __init__(self, path, *args, **kwds):
         # accept an extra "case" parameter
-        case = None
-        if 'case' in kwds:
-            case = kwds.pop('case')
+        case = kwds.pop('case', None)
         self._case = case
         self._allcases = parsettestcases(path)
         super(TTest, self).__init__(path, *args, **kwds)