@@ -71,6 +71,20 @@ class Condition {
   description() {
     return this.description_;
   }
+
+  /**
+   * Allows for lenient instanceof checks
+   * @param {!(IThenable<T>|
+   *           Condition<T>|
+   *           function(!WebDriver): T)} condition - the condition instance
+   * @return {boolean}
+   */
+  static [Symbol.hasInstance](condition) {
+    return !!condition
+      && typeof condition === 'object'
+      && typeof condition.description === 'function'
+      && typeof condition.fn === 'function';
+  }
 }