houqp commented on pull request #9042:
URL: https://github.com/apache/airflow/pull/9042#issuecomment-635027681
@potiuk I noticed travis build is already failing with this check:
```
Client: Docker Engine - Community
Version: 19.03.9
API version: 1.40
Go version: go1.13.10
Git commit: 9d988398e7
Built: Fri May 15 00:24:16 2020
OS/Arch: linux/amd64
Experimental: false
Error response from daemon: client version 1.40 is too new. Maximum
supported API version is 1.38
###########################################################################################
EXITING
/opt/airflow/scripts/ci/in_container/check_environment.sh WITH STATUS CODE 1
###########################################################################################
```
Is is expected for docker client to not be able to communicate with the
daemon in travis?
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