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);
diff --git a/tasks/tests/smartpointers_test.cpp b/tasks/tests/smartpointers_test.cpp
index ca57b6b..67b9701 100644
--- a/tasks/tests/smartpointers_test.cpp
+++ b/tasks/tests/smartpointers_test.cpp
@@ -36,6 +36,22 @@ struct Derived: public Base {};
 
 
 void test_shared_ptr() {
+    {
+      auto empty = SharedPtr<Derived>();
+      SharedPtr<Base> ptr = empty;
+      auto empty2 = SharedPtr<int>();
+      auto ptr2 = empty2;
+      std::ignore = ptr2;
+    }
+
+    {
+      auto ptr = makeShared<int>(1);
+      auto ptr2 = std::move(ptr);
+      // test nullptr checking presence 
+      assert(ptr.use_count() == 0);
+      auto wptr = WeakPtr<int>(ptr);
+      assert(wptr.expired());
+    }
 
     using std::vector;