The original title is: "Cut Memory Store Tests from 3 Hours to 10 Minutes: 18x Efficiency with pytest + Docker"

Short summary

Shared Redis instances cause cache pollution — key collisions, residual data, and environment drift — that turns test runs into multi-hour debugging marathons. The solution uses pytest with testcontainers-python to spin up a pristine, physically isolated Redis container for each test, automatically destroyed on completion. This approach cut a 3-hour test suite to 10 minutes (18x improvement) while catching real-world issues like serialization errors and timeouts that mocks miss.

• •Shared Redis instances cause key collisions, residual data, and environment drift that pollute tests
• •pytest + testcontainers-python spins up isolated Redis containers per test, auto-destroyed on completion
• •Reduced test suite from 3 hours to 10 minutes (18x) while catching real Redis behaviors mocks miss

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