https://github.com/keratin/authn-server/blob/master/Makefile...
Notice it runs "go test $(shell glide nv)"
`glide nv` is a command that gets you all packages except the vendor directory https://github.com/Masterminds/glide#glide-novendor-aliased-...
then read the go doc for test https://golang.org/cmd/go/#hdr-Test_packages:
> 'Go test' recompiles each package along with any files with names matching the file pattern "*_test.go".