After SERVER-114443, the setting of timestamps on singular insert operations will be delayed to when the write unit of work commits while primary driven index builds are enabled. speculative_snapshot_includes_all_writes.js depends on the timestamp being set earlier to test that even if a write is committed with a later timestamp, if there is an uncommitted write with an earlier timestamp, then neither writes are seen at snapshot read concern.

We'll have to disable this test when primary driven index builds are enabled.