diff --git a/.forgejo/workflows/integration-nested.yml b/.forgejo/workflows/integration-nested.yml
index 4710f50..b03563d 100644
--- a/.forgejo/workflows/integration-nested.yml
+++ b/.forgejo/workflows/integration-nested.yml
@@ -1,6 +1,6 @@
 on: [ push, pull_request ]
 jobs:
-  integration:
+  integration-nested:
     runs-on: self-hosted
     steps:
       - uses: actions/checkout@v3
diff --git a/.forgejo/workflows/integration.yml b/.forgejo/workflows/integration.yml
index d10c0ba..bfd4bc5 100644
--- a/.forgejo/workflows/integration.yml
+++ b/.forgejo/workflows/integration.yml
@@ -7,7 +7,7 @@ env:
   # Forgejo instance. The test will be a success once the status of
   # the commit is success, as set by the Forgejo Action run.
   #
-  TESTS: 'echo service container expression local-action'
+  TESTS: 'echo service container expression local-action docker-action'
 
 jobs:
   integration:
@@ -18,6 +18,14 @@ jobs:
           set -x
           LXC_IP_PREFIX=10.0.10 ./forgejo-dependencies.sh
           ./forgejo.sh setup root admin1234 codeberg.org/forgejo/forgejo 1.19
+          #
+          # Uncomment the following for a shortcut to debugging the Forgejo runner.
+          # It will build the runner from a designated repository and branch instead of
+          # downloading it from a canonical release.
+          #
+          #./forgejo-test-helper.sh build_runner http://code.forgejo.org/earl-warren/runner wip-sync
+          #export PATH=$(pwd)/forgejo-runner:$PATH
+          #
           ./forgejo-runner.sh setup
           export FORGEJO_RUNNER_LOGS=forgejo-runner.log
           for example in $TESTS ; do
diff --git a/README.md b/README.md
index ed5c26e..043e615 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ It can only be run on the `self-hosted` platform, running on a host with LXC ins
 | user | Administrator user name | `false` | root |
 | password | Administrator password | `false` | admin1234 |
 | runner | Runner git repository | `false` | https://code.forgejo.org/forgejo/runner |
-| runner-version | Runner version | `false` | v2.1.0 |
+| runner-version | Runner version | `false` | v2.3.0 |
 | container | Name of the container running the Forgejo instance | `false` | forgejo |
 | lxc-ip-prefix | Class C IP prefix used by LXC | `false` | 10.0.23 |
 <!-- action-docs-inputs -->
diff --git a/action.yml b/action.yml
index ec59a35..db98f2e 100644
--- a/action.yml
+++ b/action.yml
@@ -49,7 +49,7 @@ inputs:
     default: 'https://code.forgejo.org/forgejo/runner'
   runner-version:
     description: 'Runner version'
-    default: 'v2.1.0'
+    default: 'v2.3.0'
   container:
     description: 'Name of the container running the Forgejo instance'
     default: 'forgejo'
diff --git a/forgejo-runner.sh b/forgejo-runner.sh
index 5eabc8d..82966c7 100755
--- a/forgejo-runner.sh
+++ b/forgejo-runner.sh
@@ -41,7 +41,7 @@ function reload() {
 
 function setup() {
     local runner_repository="${1:-https://code.forgejo.org/forgejo/runner}"
-    local version="${2:-v2.1.0}"
+    local version="${2:-v2.3.0}"
     local forgejo="${3:-http://$(cat forgejo-ip):3000/}"
 
     dependencies
diff --git a/testdata/example-docker-action/.forgejo/workflows/test.yml b/testdata/example-docker-action/.forgejo/workflows/test.yml
new file mode 100644
index 0000000..988a81e
--- /dev/null
+++ b/testdata/example-docker-action/.forgejo/workflows/test.yml
@@ -0,0 +1,19 @@
+on: [push]
+
+jobs:
+  ls:
+    runs-on: docker
+    steps:
+      #
+      # This Docker action creates the file SOMEFILE ...
+      #
+      - uses: https://code.forgejo.org/forgejo/test-setup-forgejo-docker@main
+        with:
+          args: ${{ github.workspace }}/SOMEFILE
+      #
+      # ... which then also exists in the job workspace
+      # because both docker containers are automatically
+      # sharing the volume that contains it.
+      #
+      - run: |
+          test -f ${{ github.workspace }}/SOMEFILE