--- a/testing/marionette/accessibility.js
+++ b/testing/marionette/accessibility.js
@@ -237,20 +237,19 @@ accessibility.Checks = class {
    * @return {boolean}
    *     True if the accessible object has a {@code hidden} attribute,
    *     false otherwise.
    */
   hasHiddenAttribute(accessible) {
     let hidden = false;
     try {
       hidden = accessible.attributes.getStringProperty("hidden");
-    } finally {
-      // if the property is missing, error will be thrown
-      return hidden && hidden === "true";
-    }
+    } catch (e) {}
+    // if the property is missing, error will be thrown
+    return hidden && hidden === "true";
   }
 
   /**
    * Verify if an accessible has a given state.
    * Test if an accessible has a given state.
    *
    * @param {nsIAccessible} accessible
    *     Accessible object to test.