diff --git a/.github/workflows/e2e-tests.yml b/.github/workflows/e2e-tests.yml
index 03462098a..dfc4b45c6 100644
--- a/.github/workflows/e2e-tests.yml
+++ b/.github/workflows/e2e-tests.yml
@@ -234,10 +234,11 @@ jobs:
           fi
       - name: Install Python test deps
         # cspell:ignore asyncio pyppeteer pytest
-        run: python -m pip install --upgrade pip && python -m pip install pytest pytest-asyncio pyppeteer requests
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pytest pytest-asyncio pyppeteer requests
+          python -c "from pyppeteer.chromium_downloader import download_chromium; download_chromium()"
       - name: Start server and run pyppeteer tests
-        env:
-          CHROME_PATH: /usr/bin/chromium
         run: |
           python3 aria_web/server.py > /tmp/aria_server.log 2>&1 &
           READY=0
diff --git a/tests/test_aria_tests_workflow.py b/tests/test_aria_tests_workflow.py
index df48b8c9e..f6b7d7a71 100644
--- a/tests/test_aria_tests_workflow.py
+++ b/tests/test_aria_tests_workflow.py
@@ -5,10 +5,25 @@
 import pytest
 
 
+_DOWNLOAD_CMD = 'python -c "from pyppeteer.chromium_downloader import download_chromium; download_chromium()"'
+
+
 @pytest.mark.unit
 def test_pyppeteer_workflow_uses_supported_chromium_download_command() -> None:
     workflow_path = Path(__file__).resolve().parents[1] / ".github" / "workflows" / "aria-tests.yml"
     content = workflow_path.read_text(encoding="utf-8")
 
     assert "python -m pyppeteer install" not in content
-    assert 'python -c "from pyppeteer.chromium_downloader import download_chromium; download_chromium()"' in content
+    assert _DOWNLOAD_CMD in content
+
+
+@pytest.mark.unit
+def test_e2e_tests_workflow_uses_pyppeteer_bundled_chromium() -> None:
+    """e2e-tests.yml containerized_chrome job must not try to apt-install chromium."""
+    workflow_path = Path(__file__).resolve().parents[1] / ".github" / "workflows" / "e2e-tests.yml"
+    content = workflow_path.read_text(encoding="utf-8")
+
+    # Must use pyppeteer bundled download — never apt-install chromium-browser (not in Bullseye)
+    assert "chromium-browser" not in content
+    assert "python -m pyppeteer install" not in content
+    assert _DOWNLOAD_CMD in content