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-rw-r--r--test/helper.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/test/helper.py b/test/helper.py
index 0ce9a0fb3..28fd135b2 100644
--- a/test/helper.py
+++ b/test/helper.py
@@ -128,7 +128,8 @@ def expect_value(self, got, expected, field):
elif isinstance(expected, list) and isinstance(got, list):
self.assertEqual(
len(expected), len(got),
- 'Expect a list of length %d, but got a list of length %d' % (len(expected), len(got)))
+ 'Expect a list of length %d, but got a list of length %d for field %s' % (
+ len(expected), len(got), field))
for index, (item_got, item_expected) in enumerate(zip(got, expected)):
type_got = type(item_got)
type_expected = type(item_expected)