diff --git a/test/suit_task.c b/test/suit_task.c
index a0214d8a..c6f41c85 100644
--- a/test/suit_task.c
+++ b/test/suit_task.c
@@ -112,7 +112,7 @@ TEST test_tos_task_delay_abort(void)
 
     ASSERT_EQ(test_count, 0);
 
-    // yeild cpu to test_task_00
+    // yield cpu to test_task_00
     err = tos_task_delay(100);
     ASSERT_EQ(err, K_ERR_NONE);
 
@@ -121,7 +121,7 @@ TEST test_tos_task_delay_abort(void)
 
     // abort test_task_00's huge delay
     err = tos_task_delay_abort(&test_task_00);
-    // yeild cpu to test_task_00
+    // yield cpu to test_task_00
     tos_task_delay(100);
 
     // test_count should be increased, and test_task_00 will be trapped into the huge delay again
@@ -151,7 +151,7 @@ TEST test_tos_task_suspend_resume(void)
                             0);
     ASSERT_EQ(err, K_ERR_NONE);
 
-    // yeild cpu to test_task_00
+    // yield cpu to test_task_00
     tos_task_delay(500);
 
     // suspend test_task_00
@@ -161,7 +161,7 @@ TEST test_tos_task_suspend_resume(void)
     // cache the current test_count
     test_count_cache = test_count;
 
-    // yeild cpu, test_task_00 is suspended, so test_count should no more increasing
+    // yield cpu, test_task_00 is suspended, so test_count should no more increasing
     tos_task_delay(500);
 
     ASSERT_EQ(test_count_cache, test_count);
@@ -170,7 +170,7 @@ TEST test_tos_task_suspend_resume(void)
     err = tos_task_resume(&test_task_00);
     ASSERT_EQ(err, K_ERR_NONE);
 
-    // yeild cpu
+    // yield cpu
     tos_task_delay(500);
 
     // test_task_00 obtain cpu, test_count get increased.
@@ -232,7 +232,7 @@ TEST test_tos_task_yeild(void)
 
     test_count_cache = test_count;
 
-    /* we obtain cpu now, if we don't do yeild, test_task_00 will never get a
+    /* we obtain cpu now, if we don't do yield, test_task_00 will never get a
        chance to run, so test_count will never be changed.
      */
     // in 2000 ticks, test_count will never be changed.
@@ -241,7 +241,7 @@ TEST test_tos_task_yeild(void)
     }
 
     while (test_count == test_count_cache) {
-        /* we keep trying to yeild, test_task_00 will get a chance to increase test_count at last.
+        /* we keep trying to yield, test_task_00 will get a chance to increase test_count at last.
          */
         tos_task_yield();
     }