tidb_test: address comment.
tidb_test: address comment.

ueizhou/tidb,netroby/tidb,mccxj/tidb,louishust/tidb,gaocegege/tidb,tiancaiamao/tidb,ngaut/tidb,silenceper/tidb,netroby/tidb,liyu4/tidb,c4pt0r/tidb,JinheLin/tidb,mccxj/tidb,CodeRushing/tidb,kyle-wang/tidb,qiuyesuifeng/tidb,pingcap/tidb,myrice/tidb,coocood/tidb,c4pt0r/tidb,anywhy/tidb,qhsong/tidb,qiuyesuifeng/tidb,c4pt0r/tidb,ming-relax/tidb,silenceper/tidb,ueizhou/tidb,yuanwhy/tidb,c4pt0r/tidb,Nify/tidb,andelf/tidb,simon-xia/tidb,andelf/tidb,kyle-wang/tidb,EvilMcJerkface/tidb,astaxie/tidb,JinheLin/tidb,tiancaiamao/tidb,ngaut/tidb,louishust/tidb,cosmtrek/tidb,c4pt0r/tidb,gaocegege/tidb,8cbx/tidb,yangwenmai/tidb,anywhy/tidb,pingcap/tidb,CodeRushing/tidb,wusphinx/tidb,pingcap/tidb,XuHuaiyu/tidb,Cofyc/tidb,pingcap/tidb,coocood/tidb,yuanwhy/tidb,yangwenmai/tidb,cosmtrek/tidb,c4pt0r/tidb,zs634134578/tidb,kyle-wang/tidb,kyle-wang/tidb,spongedu/tidb,EvilMcJerkface/tidb,ngaut/tidb,zs634134578/tidb,zimulala/tidb,silentred/tidb,zimulala/tidb,ngaut/tidb,Cofyc/tidb,silentred/tidb,ngaut/tidb,XuHuaiyu/tidb,ngaut/tidb,wusphinx/tidb,myrice/tidb,simon-xia/tidb,pingcap/tidb,spongedu/tidb,ming-relax/tidb,pingcap/tidb,liyu4/tidb,kyle-wang/tidb,kyle-wang/tidb,8cbx/tidb,astaxie/tidb,qhsong/tidb,Nify/tidb