diff --git a/umap/static/umap/test/index.html b/umap/static/umap/test/index.html
index 8ab2c567..41d6b78c 100644
--- a/umap/static/umap/test/index.html
+++ b/umap/static/umap/test/index.html
@@ -3,6 +3,7 @@
   <head>
     <title>Umap front Tests</title>
     <meta charset="utf-8" />
+    <script type="module" src="../js/modules/leaflet-configure.js" defer></script>
     <script type="module" src="../js/modules/global.js" defer></script>
 
     <script src="../vendors/editable/Path.Drag.js" defer></script>
