diff --git a/.github/workflows/create-release-pr.yaml b/.github/workflows/create-release-pr.yaml
index a46421e..2adee0a 100644
--- a/.github/workflows/create-release-pr.yaml
+++ b/.github/workflows/create-release-pr.yaml
@@ -297,7 +297,29 @@ jobs:
       - name: Create PR
         env:
           GITHUB_TOKEN: "${{ secrets.TAYLORBOT_GITHUB_ACTION }}"
+          actor: "${{ github.actor }}"
           base: "${{ needs.gather_facts.outputs.base }}"
+          branch: "${{ needs.gather_facts.outputs.branch }}"
           version: "${{ needs.gather_facts.outputs.version }}"
         run: |
-          gh pr create --assignee ${{ github.actor }} --title "chore(release): v${{ env.version }}" --body "" --base ${{ env.base }} --head "${{ needs.gather_facts.outputs.branch }}"
+          # A repo can ship a release PR body in .github/release-pr-body.md. It is used
+          # verbatim, so a repo whose CI is triggered from the PR body - e.g. Tekton's
+          # `/run cluster-test-suites` - gets its tests run on the release PR without
+          # anyone having to remember to comment. Repos without the file keep an empty
+          # body, as before.
+          body_file=".github/release-pr-body.md"
+          if [ -f "${body_file}" ]; then
+            echo "Using release PR body from ${body_file}"
+            body="$(cat "${body_file}")"
+          else
+            body=""
+          fi
+
+          # Values come from the step environment rather than template expansions, which
+          # would be interpolated into the script before it runs.
+          gh pr create \
+            --assignee "${actor}" \
+            --title "chore(release): v${version}" \
+            --body "${body}" \
+            --base "${base}" \
+            --head "${branch}"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0f28c2e..104bc59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 however this project does not use Semantic Versioning and there are no releases.
 Instead this file uses a date-based structure.
 
+## 2026-08-06
+
+### Added
+
+- `create-release-pr`: Use `.github/release-pr-body.md` as the release PR body when a repo ships that file. Release PRs were created with an empty body, so repos whose CI is triggered from the PR body - such as Tekton's `/run cluster-test-suites` - never ran their tests on a release PR unless someone remembered to comment. Repos without the file keep an empty body. Towards https://github.com/giantswarm/roadmap/issues/4334
+
 ## 2026-08-05
 
 ### Fixed