diff --git a/.github/workflows/test-core.yml b/.github/workflows/test-core.yml
index 6eb1f96..d7a3e96 100644
--- a/.github/workflows/test-core.yml
+++ b/.github/workflows/test-core.yml
@@ -4,6 +4,7 @@ on: pull_request
 jobs:
   test-core:
     runs-on: ${{ matrix.os }}
+    container: ubuntu
     strategy:
       matrix:
         os: [ubuntu-22.04]