diff --git a/dockerfiles/test.py b/dockerfiles/test.py
index 32b6dd30..4ce86ebf 100644
--- a/dockerfiles/test.py
+++ b/dockerfiles/test.py
@@ -4,6 +4,11 @@ from jupyterhub._data import DATA_FILES_PATH
 
 print(f"DATA_FILES_PATH={DATA_FILES_PATH}")
 
-for sub_path in ("templates", "static/components", "static/css/style.min.css"):
+for sub_path in (
+    "templates",
+    "static/components",
+    "static/css/style.min.css",
+    "static/js/admin-react.js",
+):
     path = os.path.join(DATA_FILES_PATH, sub_path)
     assert os.path.exists(path), path