Made test case a bit more reliable
Made test case a bit more reliable

miaecle/deepchem,ktaneishi/deepchem,peastman/deepchem,peastman/deepchem,miaecle/deepchem,deepchem/deepchem,lilleswing/deepchem,ktaneishi/deepchem,miaecle/deepchem,lilleswing/deepchem,lilleswing/deepchem,deepchem/deepchem,ktaneishi/deepchem