diff --git a/include/test_threads.h b/include/test_threads.h
new file mode 100644
index 0000000..edd6827
--- /dev/null
+++ b/include/test_threads.h
@@ -0,0 +1,8 @@
+#ifndef __TEST_THREADS_H
+#define __TEST_THREADS_H
+
+#include <aos/aos.h>
+
+void do_test_threads(void);
+
+#endif /* __TEST_THREADS_H */
\ No newline at end of file
diff --git a/lib/grading/Hakefile b/lib/grading/Hakefile
index f605679..658dd91 100644
--- a/lib/grading/Hakefile
+++ b/lib/grading/Hakefile
@@ -20,7 +20,8 @@
         "test_mm.c",
         "test_paging.c",
         "test_spawn.c",
-        "test_ipc.c"
+        "test_ipc.c",
+        "test_threads.c"
     ],
     addLibraries = [
     ]
diff --git a/lib/grading/grading.c b/lib/grading/grading.c
index 421e672..4599a0b 100644
--- a/lib/grading/grading.c
+++ b/lib/grading/grading.c
@@ -13,6 +13,7 @@
 #include <test_paging.h>
 #include <test_spawn.h>
 #include <test_ipc.h>
+#include <test_threads.h>
 
 void
 grading_setup_bsp_init(int argc, char **argv) {
@@ -36,8 +37,9 @@ grading_test_mm(struct mm *test) {
 
 void
 grading_test_early(void) {
-  do_test_spawn();
-  do_test_ipc();
+  // do_test_spawn();
+  // do_test_ipc();
+  do_test_threads();
 }
 
 void
diff --git a/lib/grading/test_threads.c b/lib/grading/test_threads.c
new file mode 100644
index 0000000..2836cde
--- /dev/null
+++ b/lib/grading/test_threads.c
@@ -0,0 +1,8 @@
+#include <test_threads.h>
+#include <test_helper.h>
+#include <spawn/spawn.h>
+
+void do_test_threads(void) {
+    debug_printf("[do_test_threads]\n");
+}
+