diff --git a/.github/workflows/release-test.yml b/.github/workflows/release-test.yml
index 17a6d16cbcea..f80cbaa382c5 100644
--- a/.github/workflows/release-test.yml
+++ b/.github/workflows/release-test.yml
@@ -130,6 +130,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install lib32asan6
     - name: Run release tests
+      id: tests
       timeout-minutes: 350
       run: |
         RIOTBASE="$GITHUB_WORKSPACE/RIOT"
@@ -181,6 +182,27 @@ jobs:
         mkdir test-reports/
         junit2html ${REPORT_XML} ${REPORT_NAME}.html
         cp ${REPORT_XML} ${REPORT_NAME}.xml
+    - name: Generate result message
+      if: always()
+      id: generate_results
+      run: |
+        if [ "${{ steps.tests.conclusion }}" == "success" ]; then
+          nice_str="✅ **PASSED**"
+        elif [ "${{ steps.tests.conclusion }}" == "failure" ]; then
+          nice_str="❌ **FAILED**"
+        fi
+        echo "nice_str=${nice_str}" >> ${GITHUB_OUTPUT}
+    - name: Report to Matrix channel
+      if: ${{ always() && steps.generate_results.outputs.nice_str != '' }}
+      uses: s3krit/matrix-message-action@v0.0.3
+      with:
+        room_id: ${{ secrets.RIOT_CI_RELEASE_REPORT_CHANNEL }}
+        access_token: ${{ secrets.MATRIX_RIOT_CI_ACCESS_TOKEN }}
+        server: "matrix.org"
+        message: >
+          ${{ steps.generate_results.outputs.nice_str}}: Release tests
+          `[${{ join(matrix.*, ', ') }}]` on `${{ github.event_name }}`:
+          ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
     - uses: actions/upload-artifact@v2
       if: always()
       with: