Allow to fail on mri 2.
Allow to fail on mri 2.

peter-murach/github,anabhilash619/github,joshsoftware/github,befairyliu/github,firstval/github,GistBox/github,MalachiTatum/github,piotrmurach/github,yaoxiaoyong/github,durai145/github,davengeo/github,samphilipd/github,cocktail-io/github,wicky-info/github