How can `mix test`, triggered via a git hook, be cancelled when the git command itself was cancelled?

F.e. when I cancel git push, how can I make sure that mix test, triggered by below pre-push hook, gets cancelled as well.

cd `git rev-parse --show-toplevel`
echo "Testing..." >&2
mix test 2>&1 >/dev/null
if [ $? != 0 ]; then
   echo "Push rejected: tests failed" >&2
   exit 1
echo "Tests passed"

What unfortunately happens after git push is cancelled, is that above mix test spams the terminal window with test-logs. The "Push rejected: tests failed" from the above hook gets printed as well.

Test commands in other ecosystems, in the identical environment (Zsh version, etc.) with only mix test command above being replaced with for example

RAILS_ENV=test bundle exec rspec spec
# or
node_modules/.bin/jest --config ./tests/jest-config.js

seem to get cancelled - or at least they don’t echo back into terminal from where the git push was attempted (and cancelled).