diff --git a/source/stdcpp/test/list.d b/source/stdcpp/test/list.d
index d633eb0..dea98ed 100644
--- a/source/stdcpp/test/list.d
+++ b/source/stdcpp/test/list.d
@@ -48,4 +48,7 @@ unittest
     allocator!int alloc_instance = allocator!(int).init;
     auto q = list!int(8, 9);
     assert(q.get_allocator == alloc_instance);
+    assert(q.size == 8);
+    q = p; // opAssign
+    assert(q.size == 3); // after opAssign
 }