diff --git a/tests/test-parseindex.t b/tests/test-parseindex.t
--- a/tests/test-parseindex.t
+++ b/tests/test-parseindex.t
@@ -184,7 +184,7 @@
   >     try:
   >         f()
   >         print('uncaught buffer overflow?')
-  >     except ValueError, inst:
+  >     except ValueError as inst:
   >         print(inst)
   > EOF