My experience on Mac: - colima: Testcontainers cannot connect to the containers when the tests are ran from the command line (I have env vars DOCKER_HOST=unix:///Users/dxxvi/.colima/docker.sock and TESTCONTAINERS_DOCKER_SOCKET_OVERRIDE=/var/run/docker.sock). However, the same tests ran fine in IntelliJ. - Docker Desktop: doesn't have the above issue.

Don't know why.