diff --git a/archivebox/tests/test_server_security_browser.py b/archivebox/tests/test_server_security_browser.py
index 7113bbb2..13421850 100644
--- a/archivebox/tests/test_server_security_browser.py
+++ b/archivebox/tests/test_server_security_browser.py
@@ -895,6 +895,7 @@ def test_archivewebpage_wacz_preview_serves_real_capture_frame(initialized_archi
     port = get_free_port()
     env = cli_env(
         port=port,
+        server=True,
         PLUGINS="archivewebpage",
         BASE_URL=f"http://archivebox.localhost:{port}",
         URL_ALLOWLIST="",