diff --git a/.github/workflows/test_package.yml b/.github/workflows/test_package.yml
index f24225c..d4264d0 100644
--- a/.github/workflows/test_package.yml
+++ b/.github/workflows/test_package.yml
@@ -30,7 +30,7 @@ jobs:
   test-code:
     runs-on: "ubuntu-22.04"
     needs: [create-datasets, create-legacy-datasets, check-formatting]
-    container: ghcr.io/fenics/dolfinx/dolfinx:nightly
+    container: ghcr.io/fenics/dolfinx/dolfinx:v0.7.3
     env:
       DEB_PYTHON_INSTALL_LAYOUT: deb_system
       PYTHONPATH: /usr/local/lib/python3/dist-packages:/usr/local/lib:/usr/local/dolfinx-real/lib/python3.10/dist-packages