GitLab apply image only to one job

Question

I have pipeline:

stages:          # List of stages for jobs, and their order of execution
  - test
  - deploy

deploy-test:
  stage: test
  image: python
  only:
    - /^B[Ii]-.*$/
  script:
     - git --version
     - . PublishPBIReports.sh

deploy-prod:      # This job runs in the deploy stage.
  stage: deploy  # It only runs when *both* jobs in the test stage complete successfully.
  image: python
  only:
    - master
  script:
     - git --version
     - pbifiles=(git diff --name-only HEAD HEAD~1 -- '***.pbix')
     - echo $pbifiles
     - echo $CI_COMMIT_BRANCH

when i push to branches i see in runner logs that runner every time use docker:latest image for branches, but in my master branch he work correct (every time use python image and all work right).