diff --git a/tests/stdio_test.cpp b/tests/stdio_test.cpp
index e47f967..2d9717f 100644
--- a/tests/stdio_test.cpp
+++ b/tests/stdio_test.cpp
@@ -300,13 +300,21 @@
 TEST(stdio, snprintf_ld_LONG_MAX) {
   char buf[BUFSIZ];
   snprintf(buf, sizeof(buf), "%ld", LONG_MAX);
+#if __LP64__
+  EXPECT_STREQ("9223372036854775807", buf);
+#else
   EXPECT_STREQ("2147483647", buf);
+#endif
 }
 
 TEST(stdio, snprintf_ld_LONG_MIN) {
   char buf[BUFSIZ];
   snprintf(buf, sizeof(buf), "%ld", LONG_MIN);
+#if __LP64__
+  EXPECT_STREQ("-9223372036854775808", buf);
+#else
   EXPECT_STREQ("-2147483648", buf);
+#endif
 }
 
 TEST(stdio, snprintf_lld_LLONG_MAX) {