diff --git a/.github/workflows/test-build.yml b/.github/workflows/test-build.yml
index a20d1a9..8cd386b 100644
--- a/.github/workflows/test-build.yml
+++ b/.github/workflows/test-build.yml
@@ -123,6 +123,14 @@ jobs:
         RELEASE: trixie
         DEBOOTSTRAP: debootstrap
 
+
+    - name: Setup tmate session
+      if: ${{ failure() }}
+      uses: mxschmitt/action-tmate@v3
+      timeout-minutes: 45
+      with:
+        limit-access-to-actor: true
+
     - run: ./tests/gha-b2b-diff.sh test
       name: "Diff built images"
       env:
@@ -134,3 +142,4 @@ jobs:
         name: b2b-diff
         if-no-files-found: error
         path: diff.txt
+