Seen this test fail a couple of times recently (#40826 (comment) #41259 (comment)). Looking in history, I see it's been mentioned to be racy a couple of times;

• Race in "docker logs --follow" leads to hang in TestLogsFollowSlowStdoutConsumer #16462 Race in "docker logs --follow" leads to hang in TestLogsFollowSlowStdoutConsumer
• FAIL: docker_cli_logs_test.go:250: DockerSuite.TestLogsFollowSlowStdoutConsumer #29341 FAIL: docker_cli_logs_test.go:250: DockerSuite.TestLogsFollowSlowStdoutConsumer
• Decouple removing the fileWatcher from reading #27782 (comment)