diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index a6b44f873..7a0e312a6 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -38,6 +38,9 @@ jobs:
       - name: Install Playwright
         run: playwright install chromium --with-deps
 
+      - name: Download WebArena / VisualWebArena ressource files
+        run: python -c 'import nltk; nltk.download("punkt_tab")'
+
       - name: Fetch MiniWob
         uses: actions/checkout@v4
         with:
@@ -58,4 +61,4 @@ jobs:
       - name: Run AgentLab Unit Tests
         env:
           MINIWOB_URL: "http://localhost:8080/miniwob/"
-        run: pytest -n 5 --durations=10 -m 'not pricy' -v tests/
\ No newline at end of file
+        run: pytest -n 5 --durations=10 -m 'not pricy' -v tests/