When we generate timeouts in generate_resmoke_suites, we calculate the timeout to use based on the historic runtime of that tests being run. However, we fail to include any of the time spent running setup, including the time required to download the artifacts. We do include a buffer in the calculated timeouts, so we don't hit this too frequently. But that buffer is a lot smaller than we thought and any extra time spent setting up could cause the tests to hit timeouts even if the tests run at normal times.