test: update with info on running a single/few tests
-Tests
-=====
+Finit Test Suite
+================
Finit comes with a set of tests and a small framework for running them.
Contributors are encouraged to write new tests when implementing features, or
@@ -31,3 +31,7 @@ test. To execute an individual test, simply invoke the script containing it:
./test/name-of-the-test.sh
+Another way to run a single (or more) test(s) is to define the `TESTS`
+environment variable:
+
+ TESTS="start-kill-service" make check
