diff --git a/backend/src/test/java/org/raddatz/familienarchiv/service/AnnotationServiceTest.java b/backend/src/test/java/org/raddatz/familienarchiv/service/AnnotationServiceTest.java
index 549edd00..0534a7a3 100644
--- a/backend/src/test/java/org/raddatz/familienarchiv/service/AnnotationServiceTest.java
+++ b/backend/src/test/java/org/raddatz/familienarchiv/service/AnnotationServiceTest.java
@@ -238,6 +238,7 @@ class AnnotationServiceTest {
         assertThat(result.getY()).isEqualTo(0.6);
         assertThat(result.getWidth()).isEqualTo(0.3);  // unchanged
         assertThat(result.getHeight()).isEqualTo(0.4); // unchanged
+        verify(annotationRepository).save(annotation);
     }
 
     // ─── listAnnotations ──────────────────────────────────────────────────────