diff --git a/core/src/test/java/org/apache/sling/testing/mock/sling/resource/AbstractSlingCrudResourceResolverTest.java b/core/src/test/java/org/apache/sling/testing/mock/sling/resource/AbstractSlingCrudResourceResolverTest.java
index 29d50d4..0b84181 100644
--- a/core/src/test/java/org/apache/sling/testing/mock/sling/resource/AbstractSlingCrudResourceResolverTest.java
+++ b/core/src/test/java/org/apache/sling/testing/mock/sling/resource/AbstractSlingCrudResourceResolverTest.java
@@ -343,6 +343,7 @@
 
     @Test
     public void testResourceInsideAndOutsideModel() {
+        context.addModelsForClasses(ResourceModel.class);
         Resource resource = context.currentResource("/");
         assertNotNull(resource);
         ResourceModel model = resource.adaptTo(ResourceModel.class);