diff --git a/.github/workflows/notify-app-on-test-change.yml b/.github/workflows/notify-app-on-test-change.yml
new file mode 100644
index 000000000..1a1771351
--- /dev/null
+++ b/.github/workflows/notify-app-on-test-change.yml
@@ -0,0 +1,37 @@
+name: Notify App about test changes
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - 'tests/**'
+
+jobs:
+  check-and-notify:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+
+      - name: Check for test changes
+        id: check-changes
+        run: |
+          if git diff --name-only HEAD^ HEAD | grep -q "^tests/"; then
+            echo "changes_detected=true" >> $GITHUB_OUTPUT
+          else
+            echo "changes_detected=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Trigger aria-at-app workflow
+        if: steps.check-changes.outputs.changes_detected == 'true'
+        uses: peter-evans/repository-dispatch@v2
+        with:
+          token: 'TODO: ADD ONCE APPROACH IS ACCEPTED'
+          repository: w3c/aria-at-app
+          event-type: update-test-snapshots
+          client-payload: |
+            {
+              "ref": "${{ github.sha }}",
+              "commit_message": "${{ github.event.head_commit.message }}"
+            }