Improve the error message for a test that failed on the S-390 Debian buildbot.
diff --git a/Lib/test/test_errno.py b/Lib/test/test_errno.py
index 3f44965..e42c86d 100755
--- a/Lib/test/test_errno.py
+++ b/Lib/test/test_errno.py
@@ -42,7 +42,8 @@
errors_set = set(errors)
for attribute in errno.__dict__.iterkeys():
if attribute.isupper():
- self.assert_(attribute in errors_set)
+ self.assert_(attribute in errors_set,
+ "%s is an unexpected error value" % attribute)
def test_using_errorcode(self):
# Every key value in errno.errorcode should be on the module.