Reproducing an issue with Jest. When globalTeardown is set, and tests are run with --outputFile=, there is not resulting output file.
npx jest --outputFile=report.json
# Determining test suites to run...setup
# PASS ./index.test.js
# ✓ hola mundo (1 ms)
#
# Test Suites: 1 passed, 1 total
# Tests: 1 passed, 1 total
# Snapshots: 0 total
# Time: 0.101 s, estimated 1 s
# Ran all test suites.
# teardown
ls # shows no report.json