diff --git a/tests/time_test.cpp b/tests/time_test.cpp
index fb5a4a7..869ee4b 100644
--- a/tests/time_test.cpp
+++ b/tests/time_test.cpp
@@ -20,9 +20,12 @@
 
 #include <time.h>
 
-#ifdef __BIONIC__ // mktime_tz is a bionic extension.
+#if defined(__BIONIC__) // mktime_tz is a bionic extension.
 #include <libc/private/bionic_time.h>
+#endif // __BIONIC__
+
 TEST(time, mktime_tz) {
+#if defined(__BIONIC__)
   struct tm epoch;
   memset(&epoch, 0, sizeof(tm));
   epoch.tm_year = 1970 - 1900;
@@ -40,8 +43,10 @@
 
   // Missing. Falls back to UTC.
   ASSERT_EQ(2678400, mktime_tz(&epoch, "PST"));
+#else // __BIONIC__
+  GTEST_LOG_(INFO) << "This test does nothing.\n";
+#endif // __BIONIC__
 }
-#endif
 
 TEST(time, gmtime) {
   time_t t = 0;
@@ -55,7 +60,6 @@
   ASSERT_EQ(1970, broken_down->tm_year + 1900);
 }
 
-#if __BIONIC__
 TEST(time, mktime_10310929) {
   struct tm t;
   memset(&t, 0, sizeof(tm));
@@ -66,7 +70,9 @@
 #if !defined(__LP64__)
   // 32-bit bionic stupidly had a signed 32-bit time_t.
   ASSERT_EQ(-1, mktime(&t));
+#if defined(__BIONIC__)
   ASSERT_EQ(-1, mktime_tz(&t, "UTC"));
+#endif
 #else
   // Everyone else should be using a signed 64-bit time_t.
   ASSERT_GE(sizeof(time_t) * 8, 64U);
@@ -74,12 +80,15 @@
   setenv("TZ", "America/Los_Angeles", 1);
   tzset();
   ASSERT_EQ(static_cast<time_t>(4108348800U), mktime(&t));
+#if defined(__BIONIC__)
   ASSERT_EQ(static_cast<time_t>(4108320000U), mktime_tz(&t, "UTC"));
+#endif
 
   setenv("TZ", "UTC", 1);
   tzset();
   ASSERT_EQ(static_cast<time_t>(4108320000U), mktime(&t));
+#if defined(__BIONIC__)
   ASSERT_EQ(static_cast<time_t>(4108348800U), mktime_tz(&t, "America/Los_Angeles"));
 #endif
-}
 #endif
+}