I've seen questions about how to vendor come up from new members of our team and from the community in some OSS issues. Let's make our tribal knowledge a documented process!
Right now, we have a detailed guide to running acceptance tests in [CONTRIBUTING.MD](https://github.com/terraform-providers/terraform-provider-google/blob/master/.github/CONTRIBUTING.md#tests) while this file has the one-size-fits-all guideline of running `make test` and `make testacc` with no arguments. Instead, we can link to the detailed, provider specific guide so that we properly surface the required arguments/environment variables for `make testacc`, and don't incorrectly introduce `make test` as the primary means of testing the Google provider.
With go 1.8, `make build` returns the following error:
```
# github.com/terraform-providers/terraform-provider-google/vendor/github.com/hashicorp/terraform/config
vendor/github.com/hashicorp/terraform/config/testing.go:9: t.Helper undefined (type *testing.T has no field or method Helper)
```