diff --git a/src/web-animations-bonus-object-form-keyframes.js b/src/web-animations-bonus-object-form-keyframes.js
index 4c8e646..c1b6ecd 100644
--- a/src/web-animations-bonus-object-form-keyframes.js
+++ b/src/web-animations-bonus-object-form-keyframes.js
@@ -38,6 +38,7 @@
         {duration: 1});
     animation.currentTime = 0;
     animated = getComputedStyle(element).getPropertyValue('opacity') == testOpacity;
+  } catch (error) {
   } finally {
     if (animation)
       animation.cancel();