diff --git a/test/orm/inheritance/concrete.py b/test/orm/inheritance/concrete.py
index 1117d53c91..b8d799b604 100644
--- a/test/orm/inheritance/concrete.py
+++ b/test/orm/inheritance/concrete.py
@@ -212,11 +212,11 @@ class ColKeysTest(ORMTest):
         global offices_table, refugees_table
         refugees_table = Table('refugee', metadata,
            Column('refugee_fid', Integer, primary_key=True),
-           Column('refugee_name', Unicode, key='name'))
+           Column('refugee_name', Unicode(30), key='name'))
 
         offices_table = Table('office', metadata,
            Column('office_fid', Integer, primary_key=True),
-           Column('office_name', Unicode, key='name'))
+           Column('office_name', Unicode(30), key='name'))
     
     def insert_data(self):
         refugees_table.insert().execute(