diff --git a/tests/schema/tests.py b/tests/schema/tests.py
index 9c76a44200..663e0ec5f2 100644
--- a/tests/schema/tests.py
+++ b/tests/schema/tests.py
@@ -919,7 +919,7 @@ class SchemaTests(TransactionTestCase):
             editor.create_model(GeneratedFieldContainsModel)
 
         field = GeneratedField(
-            expression=Q(text__icontains="FOO"),
+            expression=Q(text__contains="foo"),
             db_persist=True,
             output_field=BooleanField(),
         )