diff --git a/.forgejo/workflows/integration.yml b/.forgejo/workflows/integration.yml
index 71d0d36..8f1f2a3 100644
--- a/.forgejo/workflows/integration.yml
+++ b/.forgejo/workflows/integration.yml
@@ -9,6 +9,7 @@ jobs:
           LXC_IP_RANGE=10.0.9 ./dependencies.sh
           ./forgejo.sh setup root admin1234 codeberg.org/forgejo/forgejo:1.19
           ./forgejo-runner.sh setup
-          # testdata/run.sh workflow http://root:admin1234@$(cat forgejo-ip):3000 root demo
-          testdata/run.sh push_self http://root:admin1234@$(cat forgejo-ip):3000 root
-          testdata/run.sh workflow http://root:admin1234@$(cat forgejo-ip):3000 root try-setup-forgejo
+          export FORGEJO_RUNNER_LOGS=forgejo-runner.log
+          ./forgejo-test-helper.sh run_workflow testdata/demo http://root:admin1234@$(cat forgejo-ip):3000 root demo setup-forgejo
+          ./forgejo-test-helper.sh push_self_action http://root:admin1234@$(cat forgejo-ip):3000 root setup-forgejo vTest
+          ./forgejo-test-helper.sh run_workflow testdata/sanity-checks http://root:admin1234@$(cat forgejo-ip):3000 root sanity-check setup-forgejo
diff --git a/README.md b/README.md
index f342ed2..d4e6fd6 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,25 @@
 <!-- action-docs-description -->
 ## Description
 
-Setup Forgejo and a runner
+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-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 $forgejo root testrepo myaction
+  Create the repository `$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`.
+
+This combination 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.
@@ -17,7 +35,7 @@ It can only be run on the `self-hosted` platform, running on a host with LXC ins
 | image-version | Container image version | `false` | 1.19 |
 | user | Administrator user name | `false` | root |
 | password | Administrator password | `false` | admin1234 |
-| runner | Runner git repository | `false` | https://code.forgejo.org/fogejo/runner |
+| runner | Runner git repository | `false` | https://code.forgejo.org/forgejo/runner |
 | runner-version | Runner version | `false` | v1.4.1 |
 <!-- action-docs-inputs -->
 
diff --git a/action.yml b/action.yml
index 46f5a29..dd3b7cd 100644
--- a/action.yml
+++ b/action.yml
@@ -1,6 +1,26 @@
 name: 'Setup Forgejo'
 author: 'Forgejo authors'
-description: 'Setup Forgejo and a runner'
+description: |
+  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-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 $forgejo root testrepo myaction
+    Create the repository `$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`.
+
+  This combination allows to run Forgejo Actions workflows from
+  `testrepo` that use the action under test (`myaction`) to verify it
+  works as intended.
+
 inputs:
   image:
     description: 'Container image'
diff --git a/forgejo-test-helper.sh b/forgejo-test-helper.sh
new file mode 100755
index 0000000..d45817e
--- /dev/null
+++ b/forgejo-test-helper.sh
@@ -0,0 +1,101 @@
+#!/bin/bash
+
+set -ex
+
+: ${LOOPS:=40}
+: ${LOOP_DELAY:=10}
+DIR=$(mktemp -d)
+
+trap "rm -fr $DIR" EXIT
+
+function check_status() {
+    local url="$1"
+    local repo="$2"
+    local sha="$3"
+
+    if ! which jq > /dev/null ; then
+	apt-get install -y -qq jq
+    fi
+    local state=$(curl --fail -sS "$url/api/v1/repos/$repo/commits/$sha/status" | jq --raw-output .state)
+    echo $state
+    test "$state" != "" -a "$state" != "pending" -a "$state" != "running" -a "$state" != "null"
+}
+
+function wait_success() {
+    local url="$1"
+    local repo="$2"
+    local sha="$3"
+
+    for i in $(seq $LOOPS); do
+	if check_status "$url" "$repo" "$sha"; then
+	    break
+	fi
+	test "$FORGEJO_RUNNER_LOGS" && tail $FORGEJO_RUNNER_LOGS
+	sleep $LOOP_DELAY
+    done
+    if ! test "$(check_status "$url" "$repo" "$sha")" = "success" ; then
+	test "$FORGEJO_RUNNER_LOGS" && cat $FORGEJO_RUNNER_LOGS
+	return 1
+    fi
+}
+
+function push() {
+    local directory="$1"
+    local url="$2"
+    local owner="$3"
+    local project="$4"
+    local self_action="$5"
+
+    local dir="$DIR/$project"
+    rsync -a $directory/ $dir/
+    sed -i -e "s|SELF|$url/$owner/$self_action|" $dir/.forgejo/workflows/*.yml
+    (
+	cd $dir
+	git init
+	git checkout -b main
+	git config user.email root@example.com
+	git config user.name username
+	git add .
+	git commit -m 'initial commit'
+	git remote add origin $url/$owner/$project
+	git push --force -u origin main
+	git rev-parse HEAD > SHA
+    )
+}
+
+function run_workflow() {
+    local directory="$1"
+    local url="$2"
+    local owner="$3"
+    local project="$4"
+    local self_action="$5"
+
+    push "$directory" "$url" "$owner" "$project" "$self_action"
+    wait_success "$url" "$owner/$project" $(cat $DIR/$project/SHA)
+}
+
+function push_self_action() {
+    local url="$1"
+    local owner="$2"
+    local self_action="$3"
+    local tag="$4"
+
+    local dir="$DIR/self"
+    git clone . $dir
+    (
+	cd $dir
+	rm -fr .forgejo .git
+	git init
+	git checkout -b main
+	git remote add origin "$url/$owner/$self_action"
+	git config user.email root@example.com
+	git config user.name username
+	git add .
+	git commit -m 'initial commit'
+	git push --force origin main
+	git tag --force $tag HEAD
+	git push --force origin $tag
+    )
+}
+
+"$@"
diff --git a/testdata/demo.yml b/testdata/demo.yml
deleted file mode 100644
index 876684c..0000000
--- a/testdata/demo.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-name: Demo
-run-name: ${{ github.actor }} is testing
-on: [push]
-jobs:
-  Explore-CI:
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo "The job was automatically triggered by a ${{ github.event_name }} event."
-      - run: echo "This job is now running on a ${{ runner.os }} server."
-      - run: echo "The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
-      - name: Check out repository code
-        uses: actions/checkout@v3
-      - run: echo "The ${{ github.repository }} repository has been cloned to the runner."
-      - run: echo "The workflow is now ready to test your code on the runner."
-      - name: List files in the repository
-        run: |
-          ls ${{ github.workspace }}
-      - run: echo "This job's status is ${{ job.status }}."
diff --git a/testdata/demo/.forgejo/workflows/test.yml b/testdata/demo/.forgejo/workflows/test.yml
new file mode 100644
index 0000000..bd05c51
--- /dev/null
+++ b/testdata/demo/.forgejo/workflows/test.yml
@@ -0,0 +1,9 @@
+on: [push]
+jobs:
+  ls:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+          ls ${{ github.workspace }}
+
diff --git a/testdata/run.sh b/testdata/run.sh
deleted file mode 100755
index 4b66810..0000000
--- a/testdata/run.sh
+++ /dev/null
@@ -1,96 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-: ${FORGEJO_RUNNER_LOGS:=forgejo-runner.log}
-DATA=$(dirname $0)
-DIR=$(mktemp -d)
-
-trap "rm -fr $DIR" EXIT
-
-function check_status() {
-    local forgejo="$1"
-    local repo="$2"
-    local sha="$3"
-
-    if ! which jq > /dev/null ; then
-	apt-get install -y -qq jq
-    fi
-    local state=$(curl --fail -sS "$forgejo/api/v1/repos/$repo/commits/$sha/status" | jq --raw-output .state)
-    echo $state
-    test "$state" != "" -a "$state" != "pending" -a "$state" != "running" -a "$state" != "null"
-}
-
-function wait_success() {
-    local forgejo="$1"
-    local repo="$2"
-    local sha="$3"
-
-    for i in $(seq 40); do
-	if check_status "$forgejo" "$repo" "$sha"; then
-	    break
-	fi
-	tail $FORGEJO_RUNNER_LOGS
-	sleep 5
-    done
-    if ! test "$(check_status "$forgejo" "$repo" "$sha")" = "success" ; then
-	cat $FORGEJO_RUNNER_LOGS
-	return 1
-    fi
-}
-
-function push() {
-    local forgejo="$1"
-    local owner="$2"
-    local workflow="$3"
-
-    local dir="$DIR/$workflow"
-    mkdir -p $dir/.forgejo/workflows
-    sed -e "s|SELF|$forgejo/$owner|" \
-	< $DATA/$workflow.yml > $dir/.forgejo/workflows/$workflow.yml
-    (
-	cd $dir
-	git init
-	git checkout -b main
-	git config user.email root@example.com
-	git config user.name username
-	git add .
-	git commit -m 'initial commit'
-	git remote add origin $forgejo/$owner/$workflow
-	git push --force -u origin main
-	git rev-parse HEAD > SHA
-    )
-}
-
-function workflow() {
-    local forgejo="${1:-http://root:admin1234@$(forgejo-ip):3000}"
-    local owner="${2:-root}"
-    local workflow="${3:-demo}"
-
-    push "$forgejo" "$owner" "$workflow"
-    wait_success "$forgejo" "$owner/$workflow" $(cat $DIR/$workflow/SHA)
-}
-
-function push_self() {
-    local forgejo="$1"
-    local owner="$2"
-
-    local dir="$DIR/self"
-    git clone . $dir
-    (
-	cd $dir
-	rm -fr .forgejo .git
-	git init
-	git checkout -b main
-	git remote add origin $forgejo/$owner/setup-forgejo
-	git config user.email root@example.com
-	git config user.name username
-	git add .
-	git commit -m 'initial commit'
-	git push --force origin main
-	git tag --force vTest HEAD
-	git push --force origin vTest
-    )
-}
-
-"$@"
diff --git a/testdata/try-setup-forgejo.yml b/testdata/sanity-checks/.forgejo/workflows/test.yml
similarity index 90%
rename from testdata/try-setup-forgejo.yml
rename to testdata/sanity-checks/.forgejo/workflows/test.yml
index e948e63..f3586e1 100644
--- a/testdata/try-setup-forgejo.yml
+++ b/testdata/sanity-checks/.forgejo/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - id: forgejo
-        uses: SELF/setup-forgejo@vTest
+        uses: SELF@vTest
         with:
           image-version: 1.19
       - run: |