diff --git a/.forgejo/workflows/integration.yml b/.forgejo/workflows/integration.yml
index 5640e91..46cf158 100644
--- a/.forgejo/workflows/integration.yml
+++ b/.forgejo/workflows/integration.yml
@@ -6,7 +6,7 @@ jobs:
       - uses: actions/checkout@v3
       - run: |
           set -x
-          LXC_IP_RANGE=10.0.9 ./dependencies.sh
+          LXC_IP_PREFIX=10.0.9 ./dependencies.sh
           ./forgejo.sh setup root admin1234 codeberg.org/forgejo/forgejo:1.19
           ./forgejo-runner.sh setup
           export FORGEJO_RUNNER_LOGS=forgejo-runner.log
diff --git a/README.md b/README.md
index d4e6fd6..1b220cb 100644
--- a/README.md
+++ b/README.md
@@ -7,21 +7,25 @@ Setup Forgejo and a runner.
 
 The forgejo-test-helper.sh script is available to help test and debug actions.
 
-forgejo=http://root:admin1234@${{ steps.forgejo.outputs.host-port }}
+`forgejo=http://root:admin1234@${{ steps.forgejo.outputs.host-port }}`
 
-* forgejo-test-helper.sh push_self_action $forgejo root myaction vTest
+* `forgejo-test-helper.sh push_self_action $forgejo root myaction vTest`
   Creates the repository `$forgejo/root/myaction` and populate it with the
   content of the repository under test, except for the `.forgejo` directory
   (it would otherwise create an infinite recursion loop). The tag `vTest` is
   set to the SHA under test.
-* forgejo-test-helper.sh run_workflow testrepo $forgejo root testrepo myaction
+* `forgejo-test-helper.sh run_workflow testrepo $forgejo root testrepo myaction`
   Create the repository `$forgejo/root/testrepo` and populate it with the
   content of the `testrepo` directory. All occurrences of `SELF` in
   `testrepo/.forgejo/workflows/*.yml` are replaced with `$forgejo/root/myaction`.
+* `forgejo-test-helper.sh push testrepo $forgejo root testrepo`
+  Create the repository `$forgejo/root/testrepo` and populate it with the
+  content of the `testrepo` directory. The SHA of the tip of the repository
+  is in the output, starting with `sha=`.
 
-This combination allows to run Forgejo Actions workflows from
-`testrepo` that use the action under test (`myaction`) to verify it
-works as intended.
+The combination of `push_self_action` and `run_workflow` allows to
+run Forgejo Actions workflows from `testrepo` that use the action
+under test (`myaction`) to verify it works as intended.
 <!-- action-docs-description -->
 
 It can only be run on the `self-hosted` platform, running on a host with LXC installed.
@@ -37,6 +41,7 @@ It can only be run on the `self-hosted` platform, running on a host with LXC ins
 | password | Administrator password | `false` | admin1234 |
 | runner | Runner git repository | `false` | https://code.forgejo.org/forgejo/runner |
 | runner-version | Runner version | `false` | v1.4.1 |
+| 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 061d693..5333385 100644
--- a/action.yml
+++ b/action.yml
@@ -44,6 +44,9 @@ inputs:
   runner-version:
     description: 'Runner version'
     default: 'v1.4.1'
+  lxc-ip-prefix:
+    description: 'Class C IP prefix used by LXC'
+    default: '10.0.23'
 outputs:
   url:
     description: "URL of the Forgejo instance"
@@ -66,7 +69,7 @@ runs:
     - id: forgejo
       run: |
         cd $(mktemp -d)
-        dependencies.sh
+        LXC_IP_PREFIX=${{ inputs.lxc-ip-prefix }} dependencies.sh
         forgejo.sh setup ${{ inputs.user }} "${{ inputs.password }}" ${{ inputs.image }}:${{ inputs.image-version }}
         forgejo-runner.sh setup ${{ inputs.runner }} ${{ inputs.runner-version }} http://$(cat forgejo-ip):3000/
         echo url="http://$(cat forgejo-ip):3000" >> $GITHUB_OUTPUT
diff --git a/dependencies.sh b/dependencies.sh
index a2069d4..dfad405 100755
--- a/dependencies.sh
+++ b/dependencies.sh
@@ -2,7 +2,7 @@
 
 set -x
 
-: ${LXC_IP_RANGE:=10.0.8}
+: ${LXC_IP_PREFIX:=10.0.8}
 
 function install_docker() {
     if ! systemctl is-active --quiet docker; then
@@ -19,10 +19,10 @@ function install_lxc() {
 	apt-get install -y -qq lxc
 	systemctl stop lxc-net
 	cat >> /etc/default/lxc-net <<EOF
-LXC_ADDR="$LXC_IP_RANGE.1"
+LXC_ADDR="$LXC_IP_PREFIX.1"
 LXC_NETMASK="255.255.255.0"
-LXC_NETWORK="$LXC_IP_RANGE.0/24"
-LXC_DHCP_RANGE="$LXC_IP_RANGE.2,$LXC_IP_RANGE.254"
+LXC_NETWORK="$LXC_IP_PREFIX.0/24"
+LXC_DHCP_RANGE="$LXC_IP_PREFIX.2,$LXC_IP_PREFIX.254"
 LXC_DHCP_MAX="253"
 EOF
 	systemctl start lxc-net