diff --git a/web/gui/src/main/webapp/tests/karma.conf.js b/web/gui/src/main/webapp/tests/karma.conf.js
index eb7dba4..3f08b15 100644
--- a/web/gui/src/main/webapp/tests/karma.conf.js
+++ b/web/gui/src/main/webapp/tests/karma.conf.js
@@ -30,6 +30,7 @@
         '../app/fw/svg/svg.js',
         '../app/fw/remote/remote.js',
         '../app/fw/widget/widget.js',
+        '../app/fw/layer/layer.js',
         // now load services etc. that augment the modules
         '../app/**/*.js',