diff --git a/tasks/tests/deque_test.cpp b/tasks/tests/deque_test.cpp
index 04860e2..c6909f8 100644
--- a/tasks/tests/deque_test.cpp
+++ b/tasks/tests/deque_test.cpp
@@ -212,7 +212,16 @@ struct NotDefaultConstructible {
     int x = 0;
 };
 
+struct NotCopyable {
+  NotCopyable() = default;
+  NotCopyable(const NotCopyable&) = delete;
+};
+
 void test6() {
+    {
+      Deque<NotCopyable> deq(10);
+    }
+
     Deque<NotDefaultConstructible> d;
     
     NotDefaultConstructible ndc = VerySpecialType(-1);