diff --git a/api/tests/conftest.py b/api/tests/conftest.py
index 4fcc8e0..7e8d128 100644
--- a/api/tests/conftest.py
+++ b/api/tests/conftest.py
@@ -262,6 +262,15 @@ def _get_posts_by_ids(post_ids: List[PostId]) -> Generator[Post, None, None]:
 
     mock.get_posts_by_ids.side_effect = _get_posts_by_ids
 
+    def _get_posts_by_note_ids(note_ids: List[NoteId]) -> Generator[Post, None, None]:
+        for post in post_samples:
+            for note in note_samples:
+                if note.note_id in note_ids and post.post_id == note.post_id:
+                    yield post
+                    break
+
+    mock.get_posts_by_note_ids.side_effect = _get_posts_by_note_ids
+
     def _get_posts_by_created_at_range(start: TwitterTimestamp, end: TwitterTimestamp) -> Generator[Post, None, None]:
         for post in post_samples:
             if start <= post.created_at < end:
diff --git a/api/tests/routers/test_data.py b/api/tests/routers/test_data.py
index 8bf271c..59fef49 100644
--- a/api/tests/routers/test_data.py
+++ b/api/tests/routers/test_data.py
@@ -39,6 +39,13 @@ def test_posts_get_has_post_id_filter(client: TestClient, post_samples: List[Pos
     }
 
 
+def test_posts_get_has_note_id_filter(client: TestClient, post_samples: List[Post], note_samples: List[Note]) -> None:
+    response = client.get(f"/api/v1/data/posts/?noteId={','.join([n.note_id for n in note_samples])}")
+    assert response.status_code == 200
+    res_json = response.json()
+    assert res_json == {"data": [json.loads(post_samples[0].model_dump_json())]}
+
+
 def test_posts_get_has_created_at_filter_start_and_end(client: TestClient, post_samples: List[Post]) -> None:
     response = client.get("/api/v1/data/posts/?createdAtStart=2006-7-25 00:00:00&createdAtEnd=2006-7-30 23:59:59")
     assert response.status_code == 200