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-rw-r--r--lib/sqlalchemy/testing/assertions.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/sqlalchemy/testing/assertions.py b/lib/sqlalchemy/testing/assertions.py
index 5af29a723..61d272160 100644
--- a/lib/sqlalchemy/testing/assertions.py
+++ b/lib/sqlalchemy/testing/assertions.py
@@ -146,8 +146,8 @@ def _expect_warnings(
def our_warn(msg, *arg, **kw):
if isinstance(msg, exc_cls):
- exception = msg
- msg = str(exception)
+ exception = type(msg)
+ msg = str(msg)
elif arg:
exception = arg[0]
else: