diff --git a/kal/posix/src/pthread.c b/kal/posix/src/pthread.c
index 37296c6e..9da1dfc5 100644
--- a/kal/posix/src/pthread.c
+++ b/kal/posix/src/pthread.c
@@ -82,7 +82,7 @@ static void *PthreadEntry(UINT32 param)
 static inline bool IsPthread(pthread_t thread)
 {
     LosTaskCB *tcb = NULL;
-    if ((UINT32)thread >= LOSCFG_BASE_CORE_TSK_LIMIT) {
+    if ((UINT32)thread > LOSCFG_BASE_CORE_TSK_LIMIT) {
         return false;
     }
     tcb = OS_TCB_FROM_TID((UINT32)thread);
diff --git a/testsuites/sample/cmsis/cmsis_func_test.c b/testsuites/sample/cmsis/cmsis_func_test.c
index d1fcf94e..f9aa29b9 100644
--- a/testsuites/sample/cmsis/cmsis_func_test.c
+++ b/testsuites/sample/cmsis/cmsis_func_test.c
@@ -66,7 +66,7 @@ LITE_TEST_CASE(CmsisFuncTestSuite, TestCmsis001, Function | MediumTest | Level1)
 
     attr.stack_mem = stackAddr;
     attr.stack_size = OS_TSK_TEST_STACK_SIZE;
-    attr.priority = osPriorityNormal;
+    attr.priority = osPriorityNormal + 1;
     attr.attr_bits = osThreadDetached;
     threadId = osThreadNew((osThreadFunc_t)CmsisStackFunc01, NULL, &attr);
     ICUNIT_GOTO_NOT_EQUAL(threadId, 0, threadId, EXIT);