fixed date subtraction for tests
fixed date subtraction for tests

icereval/scrapi,mehanig/scrapi,alexgarciac/scrapi,felliott/scrapi,jeffreyliu3230/scrapi,CenterForOpenScience/scrapi,erinspace/scrapi,mehanig/scrapi,fabianvf/scrapi,CenterForOpenScience/scrapi,ostwald/scrapi,erinspace/scrapi,fabianvf/scrapi,felliott/scrapi