diff --git a/test/test_queue.jl b/test/test_queue.jl
index 01d8dce56..3686198b5 100644
--- a/test/test_queue.jl
+++ b/test/test_queue.jl
@@ -103,6 +103,7 @@
         @test reverse(arr) == [i for i in Iterators.reverse(q)]
         @test first(Iterators.reverse(q)) === last(q)
         @test last(Iterators.reverse(q)) === first(q)
+        @test length(Iterators.reverse(q)) === length(q)
     end
 
 end # @testset Queue
diff --git a/test/test_stack.jl b/test/test_stack.jl
index e25fbbc61..95b914fea 100644
--- a/test/test_stack.jl
+++ b/test/test_stack.jl
@@ -97,6 +97,7 @@
         @test reverse(arr) == [i for i in stk]
         @test first(Iterators.reverse(stk)) === last(stk)
         @test last(Iterators.reverse(stk)) === first(stk)
+        @test length(Iterators.reverse(stk)) === length(stk)
     end
 
 end # @testset Stack