diff --git a/backend/src/test/java/org/raddatz/familienarchiv/document/annotation/AnnotationServiceTest.java b/backend/src/test/java/org/raddatz/familienarchiv/document/annotation/AnnotationServiceTest.java
index 2b81d67a..474f7f0b 100644
--- a/backend/src/test/java/org/raddatz/familienarchiv/document/annotation/AnnotationServiceTest.java
+++ b/backend/src/test/java/org/raddatz/familienarchiv/document/annotation/AnnotationServiceTest.java
@@ -8,7 +8,7 @@ import org.mockito.junit.jupiter.MockitoExtension;
 import org.mockito.ArgumentCaptor;
 import org.raddatz.familienarchiv.audit.AuditKind;
 import org.raddatz.familienarchiv.audit.AuditService;
-import org.raddatz.familienarchiv.document.transcription.TranscriptionService;
+import org.raddatz.familienarchiv.document.transcription.TranscriptionBlockRepository;
 import org.raddatz.familienarchiv.document.annotation.CreateAnnotationDTO;
 import org.raddatz.familienarchiv.document.annotation.UpdateAnnotationDTO;
 import org.raddatz.familienarchiv.exception.DomainException;
@@ -36,7 +36,7 @@ import static org.springframework.http.HttpStatus.NOT_FOUND;
 class AnnotationServiceTest {
 
     @Mock AnnotationRepository annotationRepository;
-    @Mock TranscriptionService transcriptionService;
+    @Mock TranscriptionBlockRepository transcriptionBlockRepository;
     @Mock AuditService auditService;
     @InjectMocks AnnotationService annotationService;
 
@@ -208,7 +208,7 @@ class AnnotationServiceTest {
 
         annotationService.deleteAnnotation(docId, annotId, ownerId);
 
-        verify(transcriptionService).deleteByAnnotationId(annotId);
+        verify(transcriptionBlockRepository).deleteByAnnotationId(annotId);
         verify(annotationRepository).delete(annotation);
     }
 
@@ -225,11 +225,27 @@ class AnnotationServiceTest {
 
         annotationService.deleteAnnotation(docId, annotId, ownerId);
 
-        var inOrder = org.mockito.Mockito.inOrder(transcriptionService, annotationRepository);
-        inOrder.verify(transcriptionService).deleteByAnnotationId(annotId);
+        var inOrder = org.mockito.Mockito.inOrder(transcriptionBlockRepository, annotationRepository);
+        inOrder.verify(transcriptionBlockRepository).deleteByAnnotationId(annotId);
         inOrder.verify(annotationRepository).delete(annotation);
     }
 
+    @Test
+    void deleteAnnotation_cascadesToTranscriptionBlocks() {
+        UUID docId = UUID.randomUUID();
+        UUID annotId = UUID.randomUUID();
+        UUID ownerId = UUID.randomUUID();
+
+        DocumentAnnotation annotation = DocumentAnnotation.builder()
+                .id(annotId).documentId(docId).createdBy(ownerId).build();
+        when(annotationRepository.findByIdAndDocumentId(annotId, docId))
+                .thenReturn(Optional.of(annotation));
+
+        annotationService.deleteAnnotation(docId, annotId, ownerId);
+
+        verify(transcriptionBlockRepository).deleteByAnnotationId(annotId);
+    }
+
     @Test
     void deleteAnnotation_throwsForbidden_whenUserIdIsNull() {
         UUID docId = UUID.randomUUID();