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wire 2026-06-18
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$ the-wire · showcase

CLI TEST SUITE DITCHES FLAKY SLEEPS FOR EXPLICIT WAITS

By RepoJournal · Filed · About Shopify · Composed from the cited sources · methodology

alfonso-noriega
1 person shipped this
alfonso-noriega @alfonso-noriega 2 cited

Shopify's CLI test infrastructure is killing fixed delays in favor of event-driven assertions, eliminating a class of timing-dependent test failures.

The team removed hardcoded `sleep()` calls and synthetic `setTimeout` polling from file watcher and app event tests [1][2], replacing them with Vitest's `vi.waitFor` helper [3][4]. This shift matters: tests that depend on elapsed time are inherently fragile, failing unpredictably on slower CI runners or during system load spikes. The file watcher tests were particularly problematic, mixing fixed waits with manual callback delays that made the suite slow and unreliable [3]. By switching to explicit event-driven waits, the tests now run faster and fail only when the code actually breaks, not when timing aligns wrong [4]. This is maintenance work that pays dividends immediately: faster feedback loops for developers and fewer ghost failures on deploy pipelines .

$ ls shopify/reviews/ # the step-back reads

the week in review Shopify CLI goes machine-readable for agent tooling the month in review Shopify CLI 5.0 ships standardized JSON output
Full archive → Weekly reviews →

Quick answers

What shipped in Shopify on June 18, 2026?
Shopify's CLI test infrastructure is killing fixed delays in favor of event-driven assertions, eliminating a class of timing-dependent test failures. In total, 6 commits and 3 pull requests landed.
Who contributed to Shopify on June 18, 2026?
1 developer shipped this update, including alfonso-noriega.
What were the notable Shopify updates?
Merge pull request #7846 from Shopify/06-17-remove_fixed_sleeps_from_file_watcher_tests, Remove fixed sleeps from file watcher tests, and Remove fixed sleeps from file watcher tests.
♥

$ log Shopify --recent

Hydrogen moves CSP into the core package, and a Vite build fix stops 500s on Oxygen 10 shipped Hydrogen stops leaking client IPs, app dev stops crashing on bad frames 21 shipped Theme tooling goes machine-readable, docs drift breaks CI 45 shipped Theme dev server stops forcing the exit page, and GraphiQL learns JSON 12 shipped

$ log --all # elsewhere on the wire

Agent Security Quiet day in agent security as guard coverage reaches four clients Alignment & Post-training verl defaults Ascend RL mode, open-instruct unblocks SFT packing

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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