improve style of old fs-observable tests
improve style of old fs-observable tests

nteract/composition,nteract/composition,jdfreder/nteract,rgbkrk/nteract,nteract/nteract,nteract/nteract,rgbkrk/nteract,rgbkrk/nteract,rgbkrk/nteract,jdfreder/nteract,nteract/composition,nteract/nteract,jdfreder/nteract,jdfreder/nteract,rgbkrk/nteract,nteract/nteract,nteract/nteract