diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4f99d04..06c74ee 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -405,6 +405,10 @@ jobs:
         otool -L .libs/unit
         .libs/unit --help
 
+    - name: Setup tmate session
+      uses: mxschmitt/action-tmate@v3
+      if: matrix.os == 'ubuntu-22.04' && matrix.boost == 'oldest'
+
     - name: Test scribbu (Ubuntu, oldest)
       if: matrix.os == 'ubuntu-22.04' && matrix.boost == 'oldest'
       shell: bash