diff --git a/Lib/test/test_optparse.py b/Lib/test/test_optparse.py
index e9149d9..d3ed61f 100644
--- a/Lib/test/test_optparse.py
+++ b/Lib/test/test_optparse.py
@@ -453,7 +453,7 @@
             return int(value)
         else:
             return int(value[:-1]) * _time_units[value[-1]]
-    except ValueError, IndexError:
+    except (ValueError, IndexError):
         raise OptionValueError(
             'option %s: invalid duration: %r' % (opt, value))