So as per offline discussion the file has been renamed to remove the z_ but that makes tests fail on evergreen. Figure out what is going on there and what 4.3 is and why the tests are failing there.

Old stuff:

naming retryable_reads_test.go (without the z_) causes transaction tests to fail on 4.3 on evergreen. It looks like the nth test fails on evergreen because the collection becomes empty for somereason. If this is a test is a spec test with an outcome, the collection is empty so the outcome is wrong. Renaming the retryable reads test to start with z_ was a work around that moved the issue to fall on a test without an outcome.

Evergreen patch with workaround: https://evergreen.mongodb.com/version/5d39dd989ccd4e52a4fbd4df

Evergreen patch with issue and differently ordered tests to show that its not a particular test that is failing but the nth test in the mongo package to be affected by this issue: https://evergreen.mongodb.com/version/5d38c61a3627e01527323b06

Evergreen patch with the issue and normally ordered tests: https://evergreen.mongodb.com/version/5d386cf91e2d171348bc2f34