1 files changed, 19 insertions, 0 deletions
diff --git a/test/std/utilities/time/time.duration/time.duration.arithmetic/op_-=.pass.cpp b/test/std/utilities/time/time.duration/time.duration.arithmetic/op_-=.pass.cpp
index a0a7aed202b1b..185db177882ea 100644
--- a/test/std/utilities/time/time.duration/time.duration.arithmetic/op_-=.pass.cpp
+++ b/test/std/utilities/time/time.duration/time.duration.arithmetic/op_-=.pass.cpp
@@ -16,11 +16,30 @@
 #include <chrono>
 #include <cassert>
 
+#include "test_macros.h"
+
+#if TEST_STD_VER > 14
+constexpr bool test_constexpr()
+{
+    std::chrono::seconds s(3);
+    s -= std::chrono::seconds(2);
+    if (s.count() != 1) return false;
+    s -= std::chrono::minutes(2);
+    return s.count() == -119;
+}
+#endif
+
 int main()
 {
+    {
     std::chrono::seconds s(3);
     s -= std::chrono::seconds(2);
     assert(s.count() == 1);
     s -= std::chrono::minutes(2);
     assert(s.count() == -119);
+    }
+
+#if TEST_STD_VER > 14
+    static_assert(test_constexpr(), "");
+#endif
 }