diff --git a/kernel/fork.c b/kernel/fork.c
index f68954d05e89..d8cda4c6de6c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2936,7 +2936,7 @@ static bool clone3_args_valid(struct kernel_clone_args *kargs)
 	 * - make the CLONE_DETACHED bit reusable for clone3
 	 * - make the CSIGNAL bits reusable for clone3
 	 */
-	if (kargs->flags & (CLONE_DETACHED | CSIGNAL))
+	if (kargs->flags & (CLONE_DETACHED | (CSIGNAL & (~CLONE_NEWTIME))))
 		return false;
 
 	if ((kargs->flags & (CLONE_SIGHAND | CLONE_CLEAR_SIGHAND)) ==
diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index cd4582129c7d..4fce46afe6db 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -195,5 +195,8 @@ int main(int argc, char *argv[])
 	test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
 			CLONE3_ARGS_NO_TEST);
 
+	/* Do a clone3() in a new time namespace */
+	test_clone3(CLONE_NEWTIME, 0, 0, CLONE3_ARGS_NO_TEST);
+
 	return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
 }