Did you know that you no longer have to do some complicated command line incantation to run mochi-style tests? Ted recently landed support for make mochitest-plain, make mochitest-chrome, make mochitest-a11y, and make mochitest-browser-chrome. Today, I just pushed support to specify the --test-path parameter of old. To use it, just add TEST_PATH=your/path/here to the make command line.
For those of you who are used to running browser tests, you no longer have to worry about adding in the ../browser bits to the path either. The makefile handles it all for you. Hurray!