Add `# pragma: no cover` for the py3-only branch
@@ -15,7 +15,7 @@ if six.PY2: # pragma: no cover
inspect.ArgSpec, varargs=None, keywords=None, defaults=None,
)
getargspec = inspect.getargspec
-else:
+else: # pragma: no cover
ArgSpec = functools.partial(
inspect.FullArgSpec, varargs=None, varkw=None, defaults=None,
kwonlyargs=[], kwonlydefaults=None, annotations={},
