diff --git a/test/benchmarks_test.dart b/test/benchmarks_test.dart
index 3bca380..1d85cc2 100644
--- a/test/benchmarks_test.dart
+++ b/test/benchmarks_test.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:sortedmap/sortedmap.dart';
+import 'package:sortedmap/src/treeset.dart';
 import 'package:test/test.dart';
 
 import 'util/benchmark.dart';
@@ -81,4 +82,11 @@ Future<void> main() async {
       SortedMap(const Ordering.byValue()).addAll(view);
     });
   });
+
+  group('elementAt', () {
+    var set = TreeSet()..addAll(data.values);
+    benchmark('of TreeSet', () {
+      set.elementAt(n ~/ 3);
+    });
+  });
 }