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Re:Python Pip 20.3 Released with new resolver by jackric on Monday November 30, 2020 @09:36AM (#25254112)
Another cool trick - use ephemeral memory SQLite database during unit tests:

conn = sqlite3.connect(":memory:")

But also run against your prod-like database (Postgres/MySQL etc.) later in the CI pipe to catch idiosyncratic database problems.

Re:Python Pip 20.3 Released with new resolver by aitchnyu on Monday November 30, 2020 @10:56AM (#25255060)
For Postgres, there is also disabling fsync delays (20x speed claimed) and even running it all in memory.

https://dev.to/thejessleigh/speed-up-your-postgresql-unit-te...