I think we just need to add ext/*/tests to the exclude - probably core/tests too
Not sure where this is configured though....
11:58:25 Valid JSON (./ext/wmf-civicrm/tests/phpunit/Civi/WMFAudit/data/Braintree/donation/braintree/incoming/settlement_batch_report_2022-06-28.json) 11:58:25 ./ext/wmf-civicrm/tests/phpunit/Civi/WMFAudit/data/Braintree/raw_batch/braintree/incoming/raw_disbursement_report_consolidated_2026-01-15_2026-01-15.json: Parse error on line 1: Script jsonlint $(find . -type f -iname "*.json" ! -path "*/vendor/*" ! -path "*/bower*" ! -path "*/tests/data/*" ! -path "*/civicrm/*/afform*" -printf "%p ") handling the test event returned with error code 1