diff --git a/tests/AppTest.cpp b/tests/AppTest.cpp
index 38b87a0..03a50f2 100644
--- a/tests/AppTest.cpp
+++ b/tests/AppTest.cpp
@@ -1161,7 +1161,7 @@ TEST_F(TApp, NeedsMixedFlags) {
     run();
 }
 
-#if __cplusplus <= 201703L
+#ifndef CLI11_CPP20
 
 TEST_F(TApp, RequiresMixedFlags) {
     CLI::Option *opt1 = app.add_flag("--opt1");
diff --git a/tests/CreationTest.cpp b/tests/CreationTest.cpp
index 1be2590..ccf3eea 100644
--- a/tests/CreationTest.cpp
+++ b/tests/CreationTest.cpp
@@ -168,6 +168,13 @@ TEST_F(TApp, IncorrectConstructionNeedsCannotFind) {
     EXPECT_THROW(cat->needs("--nothing"), CLI::IncorrectConstruction);
 }
 
+#ifndef CLI11_CPP20
+TEST_F(TApp, IncorrectConstructionRequiresCannotFind) {
+    auto cat = app.add_flag("--cat");
+    EXPECT_THROW(cat->requires("--nothing"), CLI::IncorrectConstruction);
+}
+#endif
+
 TEST_F(TApp, IncorrectConstructionExcludesCannotFind) {
     auto cat = app.add_flag("--cat");
     EXPECT_THROW(cat->excludes("--nothing"), CLI::IncorrectConstruction);