Test suites for utilities (cat, cp etc) Linux or BSD?

Are there any test suites available for the small programs usually shipped with the operating system? Specifically, programs like cp, cat, dd etc (anything in /bin/) on Linux or BSD; OpenBSD being the preferred option. I know that md5 has a testing script built in however I can't find any others. The regression testing suite from OpenBSD doesn't have tests for all the utilities.