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PYTHON-5861 Fix macOS ARM64 test regressions#2853

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blink1073:PYTHON-5861
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PYTHON-5861 Fix macOS ARM64 test regressions#2853
blink1073 wants to merge 3 commits into
mongodb:masterfrom
blink1073:PYTHON-5861

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@blink1073 blink1073 commented Jun 5, 2026

PYTHON-5861

Changes in this PR

Fix macOS ARM64 CI test regressions introduced after merging PYTHON-3689.

Test Plan

Evergreen patch: https://evergreen.mongodb.com/patch/6a22155d025f1b00076e6216

Checklist

Checklist for Author

  • Did you update the changelog (if necessary)?
  • Is there test coverage? — changes are to tests only
  • Is any followup work tracked in a JIRA ticket? If so, add link(s).

Checklist for Reviewer

  • Does the title of the PR reference a JIRA Ticket?
  • Do you fully understand the implementation? (Would you be comfortable explaining how this code works to someone else?)
  • Is all relevant documentation (README or docstring) updated?

Skip or fix five tests that fail consistently on macOS ARM64 CI due to
slow $where JavaScript execution and tight CSOT timeouts on that host.
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✅ All modified and coverable lines are covered by tests.

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blink1073 added 2 commits June 4, 2026 20:17
asyncio.Barrier hangs indefinitely on macOS ARM64 when fewer than
N_TASKS parties arrive at the barrier within the timeout, causing the
test to hit the 25-minute per-test timeout.
test_connection_pool_is_not_cleared runs 100 tasks each using
$where delay(0.1) with no join timeout, taking 1715s on ARM64.
test_where exercises cursor.where() which executes $where JS,
taking 76s on ARM64.
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