diff --git a/src/calibre/ebooks/oeb/display/test-cfi/cfi-test.coffee b/src/calibre/ebooks/oeb/display/test-cfi/cfi-test.coffee
index b6e1cb02dc..b259636722 100644
--- a/src/calibre/ebooks/oeb/display/test-cfi/cfi-test.coffee
+++ b/src/calibre/ebooks/oeb/display/test-cfi/cfi-test.coffee
@@ -34,6 +34,9 @@ mark_and_reload = (evt) ->
     # be on the underlying element
     if evt.button == 2
         return # Right mouse click, generated only in firefox
+    reset = document.getElementById('reset')
+    if document.elementFromPoint(evt.clientX, evt.clientY) == reset
+        return
     ms = document.getElementById("marker")
     if ms
         ms.parentNode?.removeChild(ms)