diff --git a/.github/actions/pr-scrub-notify-slack/action.yml b/.github/actions/pr-scrub-notify-slack/action.yml
new file mode 100644
index 00000000000..718ed72e6d7
--- /dev/null
+++ b/.github/actions/pr-scrub-notify-slack/action.yml
@@ -0,0 +1,38 @@
+name: Send PRs that require further testing to Slack
+permissions: {}
+
+inputs:
+  TEST_ASSISTANCE_BOT_TOKEN:
+    default: ''
+  WOO_PR_TESTING_ANALYSIS_SLACK_CHANNEL:
+    default: ''
+  WOO_PR_TESTING_ANALYSIS_TEAM_ID:
+    default: ''
+
+runs:
+  using: composite
+  steps:
+    - name: Get the PR status
+      id: get_pr_status
+      shell: bash
+      run: |
+        pr_status=${{ github.event.pull_request.merged == true && 'merged' || 'open' }}
+        echo "pr_status=$pr_status" >> $GITHUB_OUTPUT
+    - name: Calculate SLA timestamp
+      id: calculate_sla
+      shell: bash
+      run: |
+        sla_timestamp=$(date -d "+ 5 hours" -u +%s)
+        echo "sla_timestamp=$sla_timestamp" >> $GITHUB_OUTPUT
+    - name: Notify Slack
+      uses: archive/github-actions-slack@d9dae40827adf93bddf939db6552d1e392259d7d
+      id: notify
+      with:
+          slack-bot-user-oauth-access-token: ${{ inputs.TEST_ASSISTANCE_BOT_TOKEN }}
+          slack-channel: ${{ inputs.WOO_PR_TESTING_ANALYSIS_SLACK_CHANNEL }}
+          slack-text: |
+              <!subteam^${{ inputs.WOO_PR_TESTING_ANALYSIS_TEAM_ID }}>, there is a new *${{ steps.get_pr_status.outputs.pr_status }}* PR to analyze.
+              <${{ github.event.pull_request.html_url }}|${{ github.event.pull_request.title }}> :thread:
+              *SLA:* <!date^${{ steps.calculate_sla.outputs.sla_timestamp }}^{date_short_pretty} at {time}|5 hours from now>
+          slack-optional-unfurl_links: false
+          slack-optional-unfurl_media: false
diff --git a/.github/workflows/pull-request-post-merge-processing.yml b/.github/workflows/pull-request-post-merge-processing.yml
index 4d47340f4cb..5f3f6c80e06 100644
--- a/.github/workflows/pull-request-post-merge-processing.yml
+++ b/.github/workflows/pull-request-post-merge-processing.yml
@@ -51,3 +51,17 @@ jobs:
               with:
                 github_token: ${{ secrets.GITHUB_TOKEN }}
                 labels: 'needs: analysis'
+            - uses: actions/checkout@v3
+              with:
+                sparse-checkout: |
+                  .github/actions/pr-scrub-notify-slack
+                ref: trunk
+            - name: 'Trigger PR scrub'
+              if: |
+                github.event.pull_request.base.ref == 'trunk' &&
+                ! contains(github.event.pull_request.labels.*.name, 'needs: analysis')
+              uses: ./.github/actions/pr-scrub-notify-slack
+              with:
+                TEST_ASSISTANCE_BOT_TOKEN: ${{ secrets.TEST_ASSISTANCE_BOT_TOKEN }}
+                WOO_PR_TESTING_ANALYSIS_SLACK_CHANNEL: ${{ secrets.WOO_PR_TESTING_ANALYSIS_SLACK_CHANNEL }}
+                WOO_PR_TESTING_ANALYSIS_TEAM_ID: ${{ secrets.WOO_PR_TESTING_ANALYSIS_TEAM_ID }}
diff --git a/.github/workflows/test-assistant-pr-scrub.yml b/.github/workflows/test-assistant-pr-scrub.yml
index 2611c7e50c5..1707072f4a3 100644
--- a/.github/workflows/test-assistant-pr-scrub.yml
+++ b/.github/workflows/test-assistant-pr-scrub.yml
@@ -10,25 +10,15 @@ jobs:
     if: "${{ github.event.label.name == 'needs: analysis' && (github.event.pull_request.state == 'open' || github.event.pull_request.merged) }}"
     runs-on: ubuntu-20.04
     steps:
-      - name: Get the PR status
-        id: get_pr_status
-        run: |
-          pr_status=${{ github.event.pull_request.merged == true && 'merged' || 'open' }}
-          echo "pr_status=$pr_status" >> $GITHUB_OUTPUT
-      - name: Calculate SLA timestamp
-        id: calculate_sla
-        run: |
-          sla_timestamp=$(date -d "+ 5 hours" -u +%s)
-          echo "sla_timestamp=$sla_timestamp" >> $GITHUB_OUTPUT
-      - name: Notify Slack
-        uses: archive/github-actions-slack@d9dae40827adf93bddf939db6552d1e392259d7d
-        id: notify
+      - uses: actions/checkout@v3
         with:
-            slack-bot-user-oauth-access-token: ${{ secrets.TEST_ASSISTANCE_BOT_TOKEN }}
-            slack-channel: ${{ secrets.WOO_PR_TESTING_ANALYSIS_SLACK_CHANNEL }}
-            slack-text: |
-                <!subteam^${{ secrets.WOO_PR_TESTING_ANALYSIS_TEAM_ID }}>, there is a new *${{ steps.get_pr_status.outputs.pr_status }}* PR to analyze.
-                <${{ github.event.pull_request.html_url }}|${{ github.event.pull_request.title }}> :thread:
-                *SLA:* <!date^${{ steps.calculate_sla.outputs.sla_timestamp }}^{date_short_pretty} at {time}|5 hours from now>
-            slack-optional-unfurl_links: false
-            slack-optional-unfurl_media: false
+          sparse-checkout: |
+            .github/actions/pr-scrub-notify-slack
+          ref: trunk
+      - name: 'Trigger PR scrub'
+        uses: ./.github/actions/pr-scrub-notify-slack
+        with:
+          TEST_ASSISTANCE_BOT_TOKEN: ${{ secrets.TEST_ASSISTANCE_BOT_TOKEN }}
+          WOO_PR_TESTING_ANALYSIS_SLACK_CHANNEL: ${{ secrets.WOO_PR_TESTING_ANALYSIS_SLACK_CHANNEL }}
+          WOO_PR_TESTING_ANALYSIS_TEAM_ID: ${{ secrets.WOO_PR_TESTING_ANALYSIS_TEAM_ID }}
+