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-rw-r--r--lib/sqlalchemy/testing/exclusions.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/testing/exclusions.py b/lib/sqlalchemy/testing/exclusions.py
index 93f444eb9..f580f3fde 100644
--- a/lib/sqlalchemy/testing/exclusions.py
+++ b/lib/sqlalchemy/testing/exclusions.py
@@ -92,7 +92,7 @@ class Predicate(object):
return OrPredicate([cls.as_predicate(pred) for pred in predicate])
elif isinstance(predicate, tuple):
return SpecPredicate(*predicate)
- elif isinstance(predicate, str):
+ elif isinstance(predicate, util.string_types):
return SpecPredicate(predicate, None, None)
elif util.callable(predicate):
return LambdaPredicate(predicate)