diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3c9ad930..14438ddd 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-20.04, macos-latest]
 
     env:
       PIP_DISABLE_PIP_VERSION_CHECK: 1
diff --git a/tests/test_tcp.py b/tests/test_tcp.py
index 76417caf..375f330d 100644
--- a/tests/test_tcp.py
+++ b/tests/test_tcp.py
@@ -2663,9 +2663,6 @@ async def client(addr):
             self.loop.run_until_complete(client(srv.addr))
 
     def test_remote_shutdown_receives_trailing_data(self):
-        # TODO: skipping to see if this avoids the hangs
-        raise unittest.SkipTest()
-
         CHUNK = 1024 * 16
         SIZE = 8
         count = 0