diff --git a/.github/workflows/cleanup-release-branch.yml b/.github/workflows/cleanup-release-branch.yml
new file mode 100644
index 0000000..c7bdd84
--- /dev/null
+++ b/.github/workflows/cleanup-release-branch.yml
@@ -0,0 +1,19 @@
+name: Cleanup release branch
+
+on:
+  push:
+    branches:
+      - 'master'
+
+permissions:
+  contents: write
+
+jobs:
+  cleanup:
+    if: ${{ github.event.head_commit.message == 'cleanup release branch' }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Delete test release branch
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: gh api -X DELETE "repos/${GITHUB_REPOSITORY}/git/refs/heads/test%2Frelease-v1.0.0"