diff --git a/libcxx/test/std/algorithms/alg.sorting/alg.nth.element/nth_element.pass.cpp b/libcxx/test/std/algorithms/alg.sorting/alg.nth.element/nth_element.pass.cpp
--- a/libcxx/test/std/algorithms/alg.sorting/alg.nth.element/nth_element.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.sorting/alg.nth.element/nth_element.pass.cpp
@@ -47,6 +47,13 @@
         assert(input[4] == 4);
         assert(input[5] + input[6] == 5 + 9);
     }
+
+    {
+      T input[] = {0, 1, 2, 3, 4, 5, 7, 6};
+      std::nth_element(Iter(input), Iter(input + 6), Iter(input + 8));
+      assert(input[6] == 6);
+      assert(input[7] == 7);
+    }
     return true;
 }