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wire 2026-09-01
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Phoenix adds CI-friendly test summary formatter

By RepoJournal · Filed · About Elixir & Phoenix

Alexander Gubarev Barna Kovacs rhcarvalho
3 people shipped this
Alexander Gubarev @AlexGx 4 cited Barna Kovacs @preciz 1 cited rhcarvalho @rhcarvalho 1 cited

Phoenix ships a new SummaryFormatter that surfaces integration test durations in CI without sacrificing async concurrency.

Phoenix added a lightweight `Phoenix.Integration.SummaryFormatter` for CI visibility [1], replacing a run that emitted only dots for ~10 minutes with a structured Markdown summary. Running tests with `--slowest` previously forced `--trace`, which serialized async tests and set an infinite timeout; the new formatter runs at `max_cases: 20` with active timeout protection instead [1]. Elixir fixed a typecheck crash for functions with impossible clauses by returning an uncallable `fun(arity)` type [2], covering anonymous functions, local captures, and cross-module remote captures. DateTime convert/2 and truncate/2 now honor a custom calendar passed via map [3], and Kernel.CLI drops a duplicate `:elixir_def` entry [4]. The Myers list diff lost unused parameters [5], and a Kernel.SpecialForms ::/2 doc example was corrected [6].

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

the week in review Phoenix drops Ecto from phx.new.web default the month in review Elixir core tuning, Ecto breaking change, LiveView patches dominate August
Topics: Elixir & Phoenix Full archive →

Quick answers

What shipped in Elixir & Phoenix on September 1, 2026?
Phoenix ships a new SummaryFormatter that surfaces integration test durations in CI without sacrificing async concurrency. In total, 12 commits and 10 pull requests landed.
Who contributed to Elixir & Phoenix on September 1, 2026?
3 developers shipped this update, including Alexander Gubarev, Barna Kovacs, and rhcarvalho.
What were the notable Elixir & Phoenix updates?
Add SummaryFormatter for integration test visibility in CI, Fix functions with impossible clauses typecheck crash, and Fix DateTime convert/2 and truncate/2 ignoring custom calendar from map (#15814).
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$ log Elixir & Phoenix --recent

LiveView flash age 1000x too long, plus IEx autocomplete crash fix 15 shipped Elixir fixes unary operator precedence with do-end blocks 15 shipped Phoenix CI drops Process.sleep blind waits; Elixir fixes Hex version check 13 shipped Elixir date parsing loses guarded helpers 41 shipped

$ log --all # elsewhere on the wire

Meta React Native adds Stable API guards to renderer attributed string FastAPI & Pydantic Pydantic fixes Mypy plugin crash, tightens datetime constraints

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