diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 17d28ab8..fb7a089e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -29,6 +29,7 @@ jobs:
           pip3 install .[dev,test]
           make setup
         env:
+          TIRA_ROOT: ${{github.workspace}}/model/src
           TIRA_CONFIG: ${{github.workspace}}/application/config/tira-application-config.yml
       - name: Run backend tests
         working-directory: ${{github.workspace}}/application/test