Fix CI Docker Compose test failure #2284
Merged
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Seeing this failure in CI:
Hypothesis: docker-compose cannot remove the
redis
(latest) image because there is some other running container that relies on that image. This may be a CI-specific problem depending on the Azure Pipelines Docker setup.To work around (without publishing our own single-use image): use an old version of the Redis image that is unlikely to be in use by concurrent builds.