diff --git a/web/gui/src/main/webapp/tests/app/fw/widget/tooltip-spec.js b/web/gui/src/main/webapp/tests/app/fw/widget/tooltip-spec.js
index a817dbc..0ae1f65 100644
--- a/web/gui/src/main/webapp/tests/app/fw/widget/tooltip-spec.js
+++ b/web/gui/src/main/webapp/tests/app/fw/widget/tooltip-spec.js
@@ -54,6 +54,7 @@
         expect(tts.cancelTooltip()).toBeFalsy();
     });
 
+    // TODO: figure out how to test this
     // testing mouse events is tough
     // showTooltip needs a d3 event, which currently has no test backend
     // .each is a workaround, which provides this, d, and i