diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 95a42ac..c26f430 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup constants
         shell: bash
@@ -67,14 +67,14 @@ jobs:
       - name: Use new Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.x'
+          python-version: '3.11'
           architecture: x64
 
       - name: Fetch Python dependencies
         run: |
           pip install -r tests/requirements.txt
 
-      - uses: suisei-cn/actions-download-file@v1
+      - uses: suisei-cn/actions-download-file@v1.4.0
         name: Download Toit
         with:
           url: ${{ env.TOIT_URL }}
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index f15b942..b137520 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -1,12 +1,28 @@
+# Zero-Clause BSD License
+
+# Copyright (C) 2023 Toitware ApS.
+
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted.
+
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+# PERFORMANCE OF THIS SOFTWARE.
+
 name: Publish package
 on:
   push:
     tags:
-    - 'v*'
+    - 'v[0-9]+.[0-9]+.[0-9]+'
+    - 'v[0-9]+.[0-9]+.[0-9]+-*'
 jobs:
   create-release:
     name: Create new release
     runs-on: ubuntu-latest
     steps:
       - name: Publish
-        uses: toitlang/pkg-publish@v1.0.2
+        uses: toitlang/pkg-publish@v1.4.0
diff --git a/tests/README.md b/tests/README.md
index 59f167d..64ce9f5 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -10,6 +10,8 @@ The safe choice is to consider them BSD as well.
 
 ## Installation
 
+pymodbus=3.0.0.dev4 requires the 'imp' module, which was removed with Python 3.12.
+
 Install with
 
 ``` shell
diff --git a/tests/test_server.toit b/tests/test_server.toit
index 07ccb64..2bce67d 100644
--- a/tests/test_server.toit
+++ b/tests/test_server.toit
@@ -21,8 +21,8 @@ start_server mode/string:
   fork_data := pipe.fork
       true  // use_path.
       pipe.PIPE_INHERITED  // stdin.
-      pipe.PIPE_INHERITED  // stdin.
-      pipe.PIPE_INHERITED  // stdin.
+      pipe.PIPE_CREATED    // stdout.
+      pipe.PIPE_CREATED    // stderr.
       "python"  // program.
       args
   return [