diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index b37687f..fd27682 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -530,7 +530,7 @@
   EXPECT_GT(_POSIX_CHILD_MAX, 0);
   EXPECT_NE(_POSIX_CHOWN_RESTRICTED, -1);
   EXPECT_EQ(_POSIX_VERSION, _POSIX_CLOCK_SELECTION);
-  EXPECT_EQ(_POSIX_VERSION, _POSIX_CPUTIME);
+  EXPECT_EQ(0, _POSIX_CPUTIME);             // Use sysconf to detect support at runtime.
   EXPECT_GT(_POSIX_DELAYTIMER_MAX, 0);
   EXPECT_EQ(_POSIX_VERSION, _POSIX_FSYNC);
   EXPECT_GT(_POSIX_HOST_NAME_MAX, 0);
@@ -573,7 +573,7 @@
   EXPECT_EQ(_POSIX_VERSION, _POSIX_THREADS);
   EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_ATTR_STACKADDR);
   EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_ATTR_STACKSIZE);
-  EXPECT_TRUE(_POSIX_VERSION ==  _POSIX_THREAD_CPUTIME || 0 == _POSIX_THREAD_CPUTIME);
+  EXPECT_EQ(0, _POSIX_THREAD_CPUTIME);       // Use sysconf to detect support at runtime.
   EXPECT_GT(_POSIX_THREAD_DESTRUCTOR_ITERATIONS, 0);
   EXPECT_GT(_POSIX_THREAD_KEYS_MAX, 0);
   EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIORITY_SCHEDULING);