diff --git a/.github/workflows/e2e-test.yml b/.github/workflows/e2e-test.yml
index cbd97f0a..dc49e4a3 100644
--- a/.github/workflows/e2e-test.yml
+++ b/.github/workflows/e2e-test.yml
@@ -48,6 +48,7 @@ jobs:
     strategy:
       matrix:
         python_version: ["3.10", "3.11", "3.12"]
+        # macos-13 は test_macos.py が上手くテストが動かないのでスキップ
         os: ["macos-14"]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 20
diff --git a/tests/README.md b/tests/README.md
index 8bb1f2e0..e9095c3f 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -21,3 +21,14 @@ rye sync
 rye run python run.py
 rye run pytest -m tests/test_messaging.py -s
 ```
+
+## 課題
+
+### macOS
+
+- macos-13 で Video Toolbox の H.264/H.265 のテストが動作しない
+
+### Windows
+
+- 日本語を print する文があると pytest が動作しない
+- OpenH264 のテストが動作しない
diff --git a/tests/test_stats.py b/tests/test_stats.py
index 3c3bff2c..4d42946a 100644
--- a/tests/test_stats.py
+++ b/tests/test_stats.py
@@ -12,12 +12,12 @@ def test_get_stats(setup):
 
     channel_id = f"{channel_id_prefix}_{__name__}_{sys._getframe().f_code.co_name}_{uuid.uuid4()}"
 
-    client = Sendonly(signaling_urls, channel_id, metadata)
-    client.connect()
+    sendonly = Sendonly(signaling_urls, channel_id, metadata)
+    sendonly.connect()
 
     time.sleep(5)
 
-    stats = client.get_stats()
+    stats = sendonly.get_stats()
     assert len(stats) > 0
 
-    client.disconnect()
+    sendonly.disconnect()