diff --git a/backend/src/test/java/org/raddatz/familienarchiv/controller/DocumentControllerTest.java b/backend/src/test/java/org/raddatz/familienarchiv/controller/DocumentControllerTest.java
index 4e6c9c04..f226f8f4 100644
--- a/backend/src/test/java/org/raddatz/familienarchiv/controller/DocumentControllerTest.java
+++ b/backend/src/test/java/org/raddatz/familienarchiv/controller/DocumentControllerTest.java
@@ -421,6 +421,17 @@ class DocumentControllerTest {
                 .andExpect(status().isForbidden());
     }
 
+    @Test
+    @WithMockUser(authorities = "WRITE_ALL")
+    void getIncomplete_capsSizeAt200() throws Exception {
+        when(documentService.findIncompleteDocuments(anyInt())).thenReturn(List.of());
+
+        mockMvc.perform(get("/api/documents/incomplete").param("size", "9999"))
+                .andExpect(status().isOk());
+
+        verify(documentService).findIncompleteDocuments(200);
+    }
+
     // ─── GET /api/documents/incomplete/next ──────────────────────────────────
 
     @Test