Init overrides env

[daavoo]

We were missing explicit test for:

treeverse/dvc.org#2664 (comment)

[codecov-commenter]

Codecov Report

Merging #127 (d0bbde4) into master (dde220f) will not change coverage.
The diff coverage is n/a.

❗ Current head d0bbde4 differs from pull request most recent head 7a32ba6. Consider uploading reports for the commit 7a32ba6 to get more accurate results

@@           Coverage Diff           @@
##           master     #127   +/-   ##
=======================================
  Coverage   87.77%   87.77%           
=======================================
  Files          10       10           
  Lines         270      270           
=======================================
  Hits          237      237           
  Misses         33       33           

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