Test fragility because send() is not mocked

[tonyandrewmeyer]

This build broke, not because of the change, but because of a timing issue.

The tests don’t mock out the send() method, so there’s an assumption that the send() will take place in the same second as the expected request is constructed. That’s fragile, so it will break some times, like here.

We probably don’t want to mock send(), because that will change what the tests are testing too much. It might be simplest to mock time.time() itself.