diff --git a/.github/workflows/tmp-release-chain-rehearsal.yml b/.github/workflows/tmp-release-chain-rehearsal.yml
deleted file mode 100644
index e453df04..00000000
--- a/.github/workflows/tmp-release-chain-rehearsal.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-name: TEMPORARY release-chain rehearsal (remove before merge)
-
-# Exercises the exact mechanism backend-release uses to publish: a same-repo
-# reusable-workflow call of pypi-publish.yml with trusted publishing, aimed at
-# TestPyPI. PyPI verifies the job_workflow_ref claim against the registered
-# filename, which for a reusable workflow is the called file, so this run
-# either proves the call path or shows the publisher error before 0.20.0.
-
-on:
-  pull_request:
-    branches: [main]
-
-permissions: {}
-
-jobs:
-  pypi-testpypi:
-    uses: $/.github/workflows/pypi-publish.yml
-    with:
-      target: testpypi
-    permissions:
-      contents: read
-      id-token: write