1 files changed, 19 insertions, 10 deletions
diff --git a/libcxx/test/std/strings/basic.string/string.ops/string_find.first.not.of/pointer_size.pass.cpp b/libcxx/test/std/strings/basic.string/string.ops/string_find.first.not.of/pointer_size.pass.cpp
index 37ae43e77a37..97a4d500811f 100644
--- a/libcxx/test/std/strings/basic.string/string.ops/string_find.first.not.of/pointer_size.pass.cpp
+++ b/libcxx/test/std/strings/basic.string/string.ops/string_find.first.not.of/pointer_size.pass.cpp
@@ -17,7 +17,7 @@
 #include "min_allocator.h"
 
 template <class S>
-void
+TEST_CONSTEXPR_CXX20 void
 test(const S& s, const typename S::value_type* str, typename S::size_type pos,
      typename S::size_type x)
 {
@@ -28,7 +28,7 @@ test(const S& s, const typename S::value_type* str, typename S::size_type pos,
 }
 
 template <class S>
-void
+TEST_CONSTEXPR_CXX20 void
 test(const S& s, const typename S::value_type* str, typename S::size_type x)
 {
     assert(s.find_first_not_of(str) == x);
@@ -37,7 +37,7 @@ test(const S& s, const typename S::value_type* str, typename S::size_type x)
 }
 
 template <class S>
-void test0()
+TEST_CONSTEXPR_CXX20 void test0()
 {
     test(S(""), "", 0, S::npos);
     test(S(""), "laenf", 0, S::npos);
@@ -122,7 +122,7 @@ void test0()
 }
 
 template <class S>
-void test1()
+TEST_CONSTEXPR_CXX20 void test1()
 {
     test(S(""), "", S::npos);
     test(S(""), "laenf", S::npos);
@@ -142,19 +142,28 @@ void test1()
     test(S("pniotcfrhqsmgdkjbael"), "htaobedqikfplcgjsmrn", S::npos);
 }
 
-int main(int, char**)
-{
-    {
+bool test() {
+  {
     typedef std::string S;
     test0<S>();
     test1<S>();
-    }
+  }
 #if TEST_STD_VER >= 11
-    {
+  {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test0<S>();
     test1<S>();
-    }
+  }
+#endif
+
+  return true;
+}
+
+int main(int, char**)
+{
+  test();
+#if TEST_STD_VER > 17
+  // static_assert(test());
 #endif
 
   return 0;