diff --git a/tests/semaphore/sem_open.c b/tests/semaphore/sem_open.c
new file mode 100644
--- /dev/null
+++ b/tests/semaphore/sem_open.c
@@ -0,0 +1,15 @@
+#include <assert.h>
+#include <fcntl.h>
+#include <semaphore.h>
+#include <stdio.h>
+
+int main(void) {
+    sem_t *sem = sem_open("/relibc-test-sem", O_CREAT | O_EXCL, 0600, 1);
+    assert(sem != SEM_FAILED);
+    assert(sem_wait(sem) == 0);
+    assert(sem_post(sem) == 0);
+    assert(sem_close(sem) == 0);
+    assert(sem_unlink("/relibc-test-sem") == 0);
+    puts("sem_open ok");
+    return 0;
+}
diff --git a/tests/sys_shm/shmget.c b/tests/sys_shm/shmget.c
new file mode 100644
--- /dev/null
+++ b/tests/sys_shm/shmget.c
@@ -0,0 +1,15 @@
+#include <assert.h>
+#include <stdio.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+
+int main(void) {
+    int id = shmget(IPC_PRIVATE, 4096, IPC_CREAT | 0600);
+    assert(id >= 0);
+    void *ptr = shmat(id, 0, 0);
+    assert(ptr != (void *)-1);
+    assert(shmdt(ptr) == 0);
+    assert(shmctl(id, IPC_RMID, 0) == 0);
+    puts("shmget ok");
+    return 0;
+}
diff --git a/tests/sys_timerfd/timerfd.c b/tests/sys_timerfd/timerfd.c
new file mode 100644
--- /dev/null
+++ b/tests/sys_timerfd/timerfd.c
@@ -0,0 +1,18 @@
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/timerfd.h>
+#include <unistd.h>
+
+int main(void) {
+    int fd = timerfd_create(CLOCK_REALTIME, 0);
+    if (fd < 0) {
+        puts("timerfd unavailable");
+        return 0;
+    }
+    struct itimerspec spec;
+    memset(&spec, 0, sizeof(spec));
+    spec.it_value.tv_nsec = 1;
+    assert(timerfd_settime(fd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &spec, NULL) == 0);
+    assert(close(fd) == 0);
+    puts("timerfd ok");
+    return 0;
+}
diff --git a/tests/sys_signalfd/signalfd.c b/tests/sys_signalfd/signalfd.c
new file mode 100644
--- /dev/null
+++ b/tests/sys_signalfd/signalfd.c
@@ -0,0 +1,20 @@
+#include <assert.h>
+#include <signal.h>
+#include <stdio.h>
+#include <sys/signalfd.h>
+#include <unistd.h>
+
+int main(void) {
+    sigset_t mask;
+    assert(sigemptyset(&mask) == 0);
+    assert(sigaddset(&mask, SIGUSR1) == 0);
+    int fd = signalfd(-1, &mask, sizeof(mask));
+    if (fd < 0) {
+        puts("signalfd unavailable");
+        return 0;
+    }
+    assert(kill(getpid(), SIGUSR1) == 0);
+    struct signalfd_siginfo info;
+    assert(read(fd, &info, sizeof(info)) == (ssize_t)sizeof(info));
+    assert(info.ssi_signo == SIGUSR1);
+    puts("signalfd ok");
+    return 0;
+}