This is what happens when you merge without rebasing onto master first... MockExecuteCommandWithOutputFile is gone in https://github.com/rook/rook/pull/8351 but https://github.com/rook/rook/pull/8353 was merged before and https://github.com/rook/rook/pull/8351 should have been rebased first. Signed-off-by: Sébastien Han <seb@redhat.com>