Test fixes and tweak logging format

No functional changes in the code itself, aside from a tweak to a log statement. (That tweak is intended to make the log output more useful, as I'm considering building a scout plugin on top of it). The test reworking is just because when I first cloned the gem, the tests weren't passing on my system. Also removed the wrong dependency, as it's not necessary and is actually quite heavy, pulling in a lot of additional gems I didn't want.