diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f8f0df4..56268f5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -28,7 +28,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: 3.11
       - run: |
           python -m pip install -q cryptography
           make test
diff --git a/tests/channel.py b/tests/channel.py
index 33016e0..ab6a594 100644
--- a/tests/channel.py
+++ b/tests/channel.py
@@ -415,7 +415,7 @@ class TestChannel(unittest.TestCase):
             nonlocal count, write_finished
             count = writer.write(data.encode("utf-8"))
             writer.flush()
-            # writer.close() # TODO: Temporary workaround for https://github.com/python/cpython/issues/138720
+            writer.close() # TODO: Workaround for https://github.com/python/cpython/issues/138720
             write_finished = True
         threading.Thread(target=write_thread, name="Write Thread", daemon=True).start()