diff --git a/graphene/types/tests/test_type_map.py b/graphene/types/tests/test_type_map.py
index adddd3886..e6abe5a0b 100644
--- a/graphene/types/tests/test_type_map.py
+++ b/graphene/types/tests/test_type_map.py
@@ -303,6 +303,7 @@ class Meta:
         bar = String()
 
     type_map = create_type_map([FooInterface, BarInterface])
+
     assert "FooInterface" in type_map
     foo_graphql_type = type_map["FooInterface"]
     assert isinstance(foo_graphql_type, GraphQLInterfaceType)
@@ -317,5 +318,4 @@ class Meta:
     assert list(fields) == ["foo", "bar"]
     assert isinstance(fields["foo"], GraphQLField)
     assert isinstance(fields["bar"], GraphQLField)
-
-    assert bar_graphql_type.interfaces == [foo_graphql_type]
+    assert list(bar_graphql_type.interfaces) == list([foo_graphql_type])