Fix failing test and update matrix (#1010)

Author: blink1073

.github/workflows/ci.yml

@@ -20,15 +20,18 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.7", "3.10"]
+        python-version: ["3.7", "3.11"]
+        exclude:
+           - os: macos-latest
+             python-version: "3.11"  # not yet available
         include:
           - os: windows-latest
             python-version: "3.9"
           - os: ubuntu-latest
             python-version: "pypy-3.7"
-          - os: ubuntu-latest
-            python-version: "3.11-dev"
           - os: macos-latest
+            python-version: "3.10"
+          - os: ubuntu-latest
             python-version: "3.8"
     steps:
       - name: Checkout

ipykernel/tests/test_message_spec.py

@@ -509,9 +509,7 @@ def test_connect_request():
     flush_channels()
     msg = KC.session.msg("connect_request")
     KC.shell_channel.send(msg)
-    return msg["header"]["msg_id"]
-
-    msg_id = KC.kernel_info()
+    msg_id = msg["header"]["msg_id"]
     reply = get_reply(KC, msg_id, TIMEOUT)
     validate_message(reply, "connect_reply", msg_id)