diff --git a/tests/kernel/mem_protect/syscalls/src/main.c b/tests/kernel/mem_protect/syscalls/src/main.c
index 18b583fdf7b..236205d1c18 100644
--- a/tests/kernel/mem_protect/syscalls/src/main.c
+++ b/tests/kernel/mem_protect/syscalls/src/main.c
@@ -407,6 +407,10 @@ ZTEST(syscalls_extended, test_syscall_switch_stress)
 		k_thread_abort(&stress_threads[i]);
 	}
 
+	for (i = 0; i < NR_THREADS; i++) {
+		k_thread_join(&stress_threads[i], K_FOREVER);
+	}
+
 	printk("\n");
 }