diff --git a/tests/locale_test.cpp b/tests/locale_test.cpp
index b4da6de..a220c83 100644
--- a/tests/locale_test.cpp
+++ b/tests/locale_test.cpp
@@ -79,9 +79,12 @@
 }
 
 TEST(locale, newlocale_NULL_locale_name) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wnonnull"
   errno = 0;
   EXPECT_EQ(nullptr, newlocale(LC_ALL, nullptr, nullptr));
   EXPECT_EQ(EINVAL, errno);
+#pragma clang diagnostic pop
 }
 
 TEST(locale, newlocale_bad_locale_name) {