diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 56cfa2d147a..80b184c5b39 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -16,7 +16,7 @@ jobs:
   build:
     name: ${{ matrix.target }} ${{ matrix.build_type }}
     runs-on: ubuntu-latest
-    container: discourse/discourse_test:slim${{ startsWith(matrix.build_type, 'frontend') && '-browsers' || '' }}
+    container: discourse/discourse_test:2.0.20220818-0047-slim${{ startsWith(matrix.build_type, 'frontend') && '-browsers' || '' }}
     timeout-minutes: 60
 
     env: