fix: Fix flask tests

Author: untitaker

tests/integrations/flask/test_flask.py

@@ -448,7 +448,7 @@ def error_handler(err):
     exception, = event1["exception"]["values"]
     assert exception["type"] == "ValueError"
 
-    exception, = event2["exception"]["values"]
+    exception = event2["exception"]["values"][0]
     assert exception["type"] == "ZeroDivisionError"