diff --git a/python/ql/test/library-tests/frameworks/data/warnings.ql b/python/ql/test/library-tests/frameworks/data/warnings.ql
index f0968413235..07c746547dd 100644
--- a/python/ql/test/library-tests/frameworks/data/warnings.ql
+++ b/python/ql/test/library-tests/frameworks/data/warnings.ql
@@ -2,6 +2,7 @@ import python
 import semmle.python.frameworks.data.internal.ApiGraphModels as ApiGraphModels
 import semmle.python.frameworks.data.ModelsAsData
 
+overlay[local]
 class IsTesting extends ApiGraphModels::TestAllModels {
   IsTesting() { this = this }
 }