diff --git a/tests/headers/posix/fcntl_h.c b/tests/headers/posix/fcntl_h.c
index a55fe89..418add0 100644
--- a/tests/headers/posix/fcntl_h.c
+++ b/tests/headers/posix/fcntl_h.c
@@ -84,7 +84,11 @@
 
   // POSIX: "The <fcntl.h> header shall define the symbolic constants for
   // file modes for use as values of mode_t as described in <sys/stat.h>."
+  // Musl only defines the file mode bits (S_IFUSR, etc.) and not the file
+  // type bits (S_IFMT, etc.).
+#if !defined(ANDROID_HOST_MUSL)
 #include "sys_stat_h_mode_constants.h"
+#endif
 
   MACRO(AT_FDCWD);
 #if !defined(__BIONIC__) // See comment in "faccessat.cpp".
diff --git a/tests/headers/posix/limits_h.c b/tests/headers/posix/limits_h.c
index 143f717..7e92d81 100644
--- a/tests/headers/posix/limits_h.c
+++ b/tests/headers/posix/limits_h.c
@@ -32,15 +32,17 @@
 
 static void limits_h() {
   // These are only defined if they're constants.
-#if !defined(__BIONIC__) && !defined(__GLIBC__)
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(AIO_LISTIO_MAX);
   MACRO(AIO_MAX);
 #endif
-#if !defined(__BIONIC__)
+#if !defined(__BIONIC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(AIO_PRIO_DELTA_MAX);
 #endif
 #if !defined(__BIONIC__) && !defined(__GLIBC__)
   MACRO(ARG_MAX);
+#endif
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(ATEXIT_MAX);
   MACRO(CHILD_MAX);
 #endif
@@ -50,14 +52,16 @@
   MACRO(HOST_NAME_MAX);
   MACRO(IOV_MAX);
   MACRO(LOGIN_NAME_MAX);
-#if !defined(__BIONIC__) && !defined(__GLIBC__)
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(MQ_OPEN_MAX);
 #endif
 #if !defined(__BIONIC__)
   MACRO(MQ_PRIO_MAX);
 #endif
-#if !defined(__BIONIC__) && !defined(__GLIBC__)
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(OPEN_MAX);
+#endif
+#if !defined(__BIONIC__) && !defined(__GLIBC__)
   MACRO(PAGESIZE);
   MACRO(PAGE_SIZE);
 #endif
@@ -66,19 +70,25 @@
 #if !defined(__BIONIC__)
   MACRO(PTHREAD_STACK_MIN);
 #endif
-#if !defined(__BIONIC__) && !defined(__GLIBC__)
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(PTHREAD_THREADS_MAX);
 #endif
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(RTSIG_MAX);
+#endif
 #if !defined(__BIONIC__) && !defined(__GLIBC__)
   MACRO(SEM_NSEMS_MAX);
 #endif
   MACRO(SEM_VALUE_MAX);
-#if !defined(__BIONIC__) && !defined(__GLIBC__)
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(SIGQUEUE_MAX);
   MACRO(SS_REPL_MAX);
   MACRO(STREAM_MAX);
+#endif
+#if !defined(__BIONIC__) && !defined(__GLIBC__)
   MACRO(SYMLOOP_MAX);
+#endif
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(TIMER_MAX);
 #endif
 #if !defined(__BIONIC__)
@@ -90,10 +100,14 @@
 
 #if !defined(__BIONIC__) && !defined(__GLIBC__)
   MACRO(FILESIZEBITS);
+#endif
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(LINK_MAX);
 #endif
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(MAX_CANON);
   MACRO(MAX_INPUT);
+#endif
   MACRO(NAME_MAX);
   MACRO(PATH_MAX);
   MACRO(PIPE_BUF);
@@ -104,7 +118,7 @@
   MACRO(POSIX_REC_MIN_XFER_SIZE);
   MACRO(POSIX_REC_XFER_ALIGN);
 #endif
-#if !defined(__BIONIC__) && !defined(__GLIBC__)
+#if !defined(__BIONIC__) && !defined(__GLIBC__) && !defined(ANDROID_HOST_MUSL)
   MACRO(SYMLINK_MAX);
 #endif
 
diff --git a/tests/headers/posix/unistd_h.c b/tests/headers/posix/unistd_h.c
index b713f53..0b2cee5 100644
--- a/tests/headers/posix/unistd_h.c
+++ b/tests/headers/posix/unistd_h.c
@@ -51,8 +51,10 @@
   MACRO(_POSIX_MESSAGE_PASSING);
   MACRO(_POSIX_MONOTONIC_CLOCK);
   MACRO(_POSIX_NO_TRUNC);
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_POSIX_PRIORITIZED_IO);
   MACRO(_POSIX_PRIORITY_SCHEDULING);
+#endif
   MACRO(_POSIX_RAW_SOCKETS);
   MACRO(_POSIX_READER_WRITER_LOCKS);
   MACRO(_POSIX_REALTIME_SIGNALS);
@@ -63,35 +65,51 @@
   MACRO(_POSIX_SHELL);
   MACRO(_POSIX_SPAWN);
   MACRO(_POSIX_SPIN_LOCKS);
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_POSIX_SPORADIC_SERVER);
   MACRO(_POSIX_SYNCHRONIZED_IO);
+#endif
   MACRO(_POSIX_THREAD_ATTR_STACKADDR);
   MACRO(_POSIX_THREAD_ATTR_STACKSIZE);
   MACRO(_POSIX_THREAD_CPUTIME);
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_POSIX_THREAD_PRIO_INHERIT);
   MACRO(_POSIX_THREAD_PRIO_PROTECT);
+#endif
   MACRO(_POSIX_THREAD_PRIORITY_SCHEDULING);
   MACRO(_POSIX_THREAD_PROCESS_SHARED);
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_POSIX_THREAD_ROBUST_PRIO_INHERIT);
   MACRO(_POSIX_THREAD_ROBUST_PRIO_PROTECT);
+#endif
   MACRO(_POSIX_THREAD_SAFE_FUNCTIONS);
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_POSIX_THREAD_SPORADIC_SERVER);
+#endif
   MACRO(_POSIX_THREADS);
   MACRO(_POSIX_TIMEOUTS);
   MACRO(_POSIX_TIMERS);
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_POSIX_TYPED_MEMORY_OBJECTS);
+#endif
   MACRO(_POSIX2_C_BIND);
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_POSIX2_CHAR_TERM);
   MACRO(_POSIX2_LOCALEDEF);
   MACRO(_POSIX2_SW_DEV);
+#endif
 #if 0 // No libc I can find actually has this.
   MACRO(_POSIX2_UPE);
 #endif
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_XOPEN_CRYPT);
+#endif
   MACRO(_XOPEN_ENH_I18N);
+#if !defined(ANDROID_HOST_MUSL)
   MACRO(_XOPEN_REALTIME);
   MACRO(_XOPEN_REALTIME_THREADS);
   MACRO(_XOPEN_SHM);
+#endif
   MACRO(_XOPEN_UNIX);
 #if defined(_XOPEN_UUCP)
 #if _XOPEN_UUCP != -1 && _XOPEN_UUCP != 0 && _XOPEN_UUCP != 200809L