diff --git a/tests/constexpr.cpp b/tests/constexpr.cpp
index 9dabfd1..dc4db43 100644
--- a/tests/constexpr.cpp
+++ b/tests/constexpr.cpp
@@ -8,7 +8,7 @@
   REQUIRE(e);
 
 TEST_CASE("Constexpr", "[constexpr]") {
-#if !defined(TL_OPTIONAL_MSVC2015) && !defined(TL_OPTIONAL_GCC49)
+#if !defined(TL_OPTIONAL_MSVC2015) && defined(TL_OPTIONAL_CXX14)
   SECTION("empty construct") {
     constexpr tl::optional<int> o2{};
     constexpr tl::optional<int> o3 = {};
diff --git a/tests/extensions.cpp b/tests/extensions.cpp
index 0f9827d..1524612 100644
--- a/tests/extensions.cpp
+++ b/tests/extensions.cpp
@@ -133,7 +133,7 @@ TEST_CASE("Monadic operations", "[monadic]") {
   }
 
   SECTION("map constexpr") {
-#if !defined(_MSC_VER) && !defined(TL_OPTIONAL_GCC49)
+#if !defined(_MSC_VER) && defined(TL_OPTIONAL_CXX14)
     // test each overload in turn
     constexpr tl::optional<int> o16 = 42;
     constexpr auto o16r = o16.map(get_int);
@@ -243,7 +243,7 @@ TEST_CASE("Monadic operations", "[monadic]") {
   }
 
   SECTION("constexpr and_then") {
-#if !defined(_MSC_VER) && !defined(TL_OPTIONAL_GCC49)
+#if !defined(_MSC_VER) && defined(TL_OPTIONAL_CXX14)
 
     constexpr tl::optional<int> o10 = 42;
     constexpr auto o10r = o10.and_then(get_opt_int);