diff --git a/libc/include/bits/posix_limits.h b/libc/include/bits/posix_limits.h
index 0f17381..1bd87f4 100644
--- a/libc/include/bits/posix_limits.h
+++ b/libc/include/bits/posix_limits.h
@@ -95,8 +95,8 @@
 #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
 #define _POSIX_THREAD_KEYS_MAX      128
 #define _POSIX_THREAD_PRIORITY_SCHEDULING 200809L
-#define _POSIX_THREAD_PRIO_INHERIT  200809L  /* linux feature */
-#define _POSIX_THREAD_PRIO_PROTECT  200809L  /* linux feature */
+#define _POSIX_THREAD_PRIO_INHERIT -1  /* not implemented */
+#define _POSIX_THREAD_PRIO_PROTECT -1  /* not implemented */
 #define _POSIX_THREAD_PROCESS_SHARED  -1  /* not implemented */
 #define _POSIX_THREAD_ROBUST_PRIO_INHERIT -1  /* not implemented */
 #define _POSIX_THREAD_ROBUST_PRIO_PROTECT -1  /* not implemented */
diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index 0729013..3a87e88 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -609,8 +609,8 @@
   EXPECT_GT(_POSIX_THREAD_DESTRUCTOR_ITERATIONS, 0);
   EXPECT_EQ(_POSIX_THREAD_KEYS_MAX, 128);
   EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIORITY_SCHEDULING);
-  EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIO_INHERIT);
-  EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIO_PROTECT);
+  EXPECT_EQ(-1, _POSIX_THREAD_PRIO_INHERIT);
+  EXPECT_EQ(-1, _POSIX_THREAD_PRIO_PROTECT);
   EXPECT_EQ(-1, _POSIX_THREAD_ROBUST_PRIO_PROTECT);
   EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_SAFE_FUNCTIONS);
   EXPECT_EQ(-1, _POSIX_THREAD_SPORADIC_SERVER);
@@ -672,7 +672,7 @@
 #endif // defined(__BIONIC__)
 }
 
-#define VERIFY_SYSCONF_NOT_SUPPORT(name) VerifySysconf(name, #name, [](long v){return v == -1;})
+#define VERIFY_SYSCONF_UNSUPPORTED(name) VerifySysconf(name, #name, [](long v){return v == -1;})
 
 // sysconf() means unlimited when it returns -1 with errno unchanged.
 #define VERIFY_SYSCONF_POSITIVE(name) \
@@ -704,9 +704,9 @@
   VERIFY_SYSCONF_POSITIVE(_SC_OPEN_MAX);
   VERIFY_SYSCONF_POSITIVE(_SC_PASS_MAX);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_2_C_BIND);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_FORT_DEV);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_FORT_RUN);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_UPE);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_FORT_DEV);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_FORT_RUN);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_UPE);
   VERIFY_SYSCONF_POSITIVE(_SC_JOB_CONTROL);
   VERIFY_SYSCONF_POSITIVE(_SC_SAVED_IDS);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_VERSION);
@@ -753,20 +753,20 @@
   VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_ATTR_STACKADDR);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_ATTR_STACKSIZE);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIORITY_SCHEDULING);
-  VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIO_INHERIT);
-  VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIO_PROTECT);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_THREAD_PRIO_INHERIT);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_THREAD_PRIO_PROTECT);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_SAFE_FUNCTIONS);
   VERIFY_SYSCONF_POSITIVE(_SC_NPROCESSORS_CONF);
   VERIFY_SYSCONF_POSITIVE(_SC_NPROCESSORS_ONLN);
   VERIFY_SYSCONF_POSITIVE(_SC_PHYS_PAGES);
   VERIFY_SYSCONF_POSITIVE(_SC_AVPHYS_PAGES);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_MONOTONIC_CLOCK);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_ACCOUNTING);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_CHECKPOINT);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_LOCATE);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_MESSAGE);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_TRACK);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_PBS);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_PBS_ACCOUNTING);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_PBS_CHECKPOINT);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_PBS_LOCATE);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_PBS_MESSAGE);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_PBS_TRACK);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_CLOCK_SELECTION);
   VERIFY_SYSCONF_POSITIVE(_SC_HOST_NAME_MAX);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_IPV6);
@@ -774,64 +774,64 @@
   VERIFY_SYSCONF_POSIX_VERSION(_SC_READER_WRITER_LOCKS);
   VERIFY_SYSCONF_POSITIVE(_SC_REGEXP);
   VERIFY_SYSCONF_POSITIVE(_SC_SHELL);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPORADIC_SERVER);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_SPORADIC_SERVER);
   VERIFY_SYSCONF_POSITIVE(_SC_SYMLOOP_MAX);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_CPUTIME);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_SPORADIC_SERVER);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_THREAD_SPORADIC_SERVER);
   VERIFY_SYSCONF_POSIX_VERSION(_SC_TIMEOUTS);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_EVENT_FILTER);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_EVENT_NAME_MAX);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_INHERIT);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_LOG);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_NAME_MAX);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_SYS_MAX);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_USER_EVENT_MAX);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_TYPED_MEMORY_OBJECTS);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_STREAMS);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TRACE);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TRACE_EVENT_FILTER);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TRACE_EVENT_NAME_MAX);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TRACE_INHERIT);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TRACE_LOG);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TRACE_NAME_MAX);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TRACE_SYS_MAX);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TRACE_USER_EVENT_MAX);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_TYPED_MEMORY_OBJECTS);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_XOPEN_STREAMS);
 
 #if defined(__LP64__)
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFF32);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFFBIG);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_V7_ILP32_OFF32);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_V7_ILP32_OFFBIG);
   VERIFY_SYSCONF_POSITIVE(_SC_V7_LP64_OFF64);
   VERIFY_SYSCONF_POSITIVE(_SC_V7_LPBIG_OFFBIG);
 #else
   VERIFY_SYSCONF_POSITIVE(_SC_V7_ILP32_OFF32);
 #if defined(__BIONIC__)
   // bionic does not support 64 bits off_t type on 32bit machine.
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFFBIG);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_V7_ILP32_OFFBIG);
 #endif
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_LP64_OFF64);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_LPBIG_OFFBIG);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_V7_LP64_OFF64);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_V7_LPBIG_OFFBIG);
 #endif
 
 #if defined(__BIONIC__)
   // Tests can only run on bionic, as bionic and glibc have different support for these options.
   // Below options are not supported on bionic yet.
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_ASYNCHRONOUS_IO);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_BARRIERS);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_MESSAGE_PASSING);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_PRIORITIZED_IO);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_SHARED_MEMORY_OBJECTS);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPAWN);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPIN_LOCKS);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_PROCESS_SHARED);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_ROBUST_PRIO_INHERIT);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_ROBUST_PRIO_PROTECT);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_ASYNCHRONOUS_IO);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_BARRIERS);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_MESSAGE_PASSING);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_PRIORITIZED_IO);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_SHARED_MEMORY_OBJECTS);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_SPAWN);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_SPIN_LOCKS);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_THREAD_PROCESS_SHARED);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_THREAD_ROBUST_PRIO_INHERIT);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_THREAD_ROBUST_PRIO_PROTECT);
 
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_C_DEV);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_CHAR_TERM);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_LOCALEDEF);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_SW_DEV);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_VERSION);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_C_DEV);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_CHAR_TERM);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_LOCALEDEF);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_SW_DEV);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_2_VERSION);
 
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_CRYPT);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_ENH_I18N);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_LEGACY);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_REALTIME);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_REALTIME_THREADS);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_SHM);
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_UUCP);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_XOPEN_CRYPT);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_XOPEN_ENH_I18N);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_XOPEN_LEGACY);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_XOPEN_REALTIME);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_XOPEN_REALTIME_THREADS);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_XOPEN_SHM);
+  VERIFY_SYSCONF_UNSUPPORTED(_SC_XOPEN_UUCP);
 #endif // defined(__BIONIC__)
 }