1 files changed, 10 insertions, 0 deletions
diff --git a/libcxx/test/numerics/complex.number/complex.special/long_double_double_implicit.pass.cpp b/libcxx/test/numerics/complex.number/complex.special/long_double_double_implicit.pass.cpp
index 14eff25e7b4..aab539407d0 100644
--- a/libcxx/test/numerics/complex.number/complex.special/long_double_double_implicit.pass.cpp
+++ b/libcxx/test/numerics/complex.number/complex.special/long_double_double_implicit.pass.cpp
@@ -20,8 +20,18 @@
 
 int main()
 {
+    {
     const std::complex<double> cd(2.5, 3.5);
     std::complex<long double> cf = cd;
     assert(cf.real() == cd.real());
     assert(cf.imag() == cd.imag());
+    }
+#ifndef _LIBCPP_HAS_NO_CONSTEXPR
+    {
+    constexpr std::complex<double> cd(2.5, 3.5);
+    constexpr std::complex<long double> cf = cd;
+    static_assert(cf.real() == cd.real(), "");
+    static_assert(cf.imag() == cd.imag(), "");
+    }
+#endif
 }