diff --git a/openlayers/openlayers-tests.ts b/openlayers/openlayers-tests.ts
index 2da9e19a3..50dc00c7e 100644
--- a/openlayers/openlayers-tests.ts
+++ b/openlayers/openlayers-tests.ts
@@ -1,4 +1,4 @@
-/// <reference path="openLayers.d.ts" />
+/// <reference path="openlayers.d.ts" />
 
 // Attribution
 var attribution: ol.Attribution = new ol.Attribution({