diff --git a/tests/posix/common/src/pthread.c b/tests/posix/common/src/pthread.c
index f3facdf86861d0f..5a856057cec34f5 100644
--- a/tests/posix/common/src/pthread.c
+++ b/tests/posix/common/src/pthread.c
@@ -539,6 +539,33 @@ ZTEST(pthread, test_pthread_testcancel)
 	zassert_false(testcancel_failed);
 }
 
+static void *test_pthread_setschedprio_fn(void *arg)
+{
+	pthread_t self;
+	int prio = K_LOWEST_APPLICATION_THREAD_PRIO;
+	int policy;
+	struct sched_param getschedparam;
+
+	getschedparam.sched_priority = K_HIGHEST_APPLICATION_THREAD_PRIO;
+
+	self = pthread_self();
+
+	zassert_equal(pthread_setschedprio(self, PRIO_INVALID), EINVAL, "EINVAL was expected");
+	zassert_equal(pthread_setschedprio(PTHREAD_INVALID, prio), ESRCH, "ESRCH was expected");
+
+	zassert_ok(pthread_setschedprio(self, prio));
+	zassert_ok(pthread_getschedparam(self, &policy, &getschedparam));
+	zassert_equal(getschedparam.sched_priority, prio, "Priority unchanged");
+}
+
+ZTEST(pthread, test_pthread_setschedprio)
+{
+	pthread_t th;
+
+	zassert_ok(pthread_create(&th, NULL, test_pthread_setschedprio_fn, NULL));
+	zassert_ok(pthread_join(th, NULL));
+}
+
 static void before(void *arg)
 {
 	ARG_UNUSED(arg);
diff --git a/tests/posix/headers/src/pthread_h.c b/tests/posix/headers/src/pthread_h.c
index 2f6a7942092b384..66895ec549a4589 100644
--- a/tests/posix/headers/src/pthread_h.c
+++ b/tests/posix/headers/src/pthread_h.c
@@ -151,7 +151,7 @@ ZTEST(posix_headers, test_pthread_h)
 		zassert_not_null(pthread_setcanceltype);
 		zassert_not_null(pthread_setconcurrency);
 		zassert_not_null(pthread_setschedparam);
-		/* zassert_not_null(pthread_setschedprio); */ /* not implemented */
+		zassert_not_null(pthread_setschedprio);
 		zassert_not_null(pthread_setspecific);
 		zassert_not_null(pthread_spin_destroy);
 		zassert_not_null(pthread_spin_init);