SelfRefTest was not getting properly filtered out of mssql tests (__unsupported_on__...

diff --git a/test/orm/test_naturalpks.py b/test/orm/test_naturalpks.py
index 806558a2bb1635980b1ed952e2e06a1444435f5f..16504f2a23620eafa39a5210b52dd0a404238d35 100644 (file)
--- a/test/orm/test_naturalpks.py
+++ b/test/orm/test_naturalpks.py
@@ -423,7 +423,7 @@ class ReversePKsTest(_base.MappedTest):
 
     
 class SelfRefTest(_base.MappedTest):
-    __unsupported_on__ = 'mssql' # mssql doesn't allow ON UPDATE on self-referential keys
+    __unsupported_on__ = ('mssql',) # mssql doesn't allow ON UPDATE on self-referential keys
 
     @classmethod
     def define_tables(cls, metadata):