⬆️ deps: Update Python dev dependencies

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
pytest (changelog)	>=9.1.0 → >=9.1.1
ruff (source, changelog)	>=0.15.17 → >=0.15.19
ty (changelog)	>=0.0.50 → >=0.0.53

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Release Notes

pytest-dev/pytest (pytest)

v9.1.1

Compare Source

pytest 9.1.1 (2026-06-19)

Bug fixes

• #​14220: Fixed a logic bug in pytest.RaisesGroup which would might cause it to display incorrect "It matches FooError() which was paired with BarError" messages.
• #​14591: Fixed a regression in pytest 9.1.0 which caused overriding a parametrized fixture with an indirect @​pytest.mark.parametrize to fail with "duplicate parametrization of '<fixture name>'".
• #​14606: Fixed list-item typing errors from mypy in @pytest.mark.parametrize <pytest.mark.parametrize ref> argvalues parameter.
• #​14608: Fixed a regression in pytest 9.1.0 where conftest.py files located in <invocation dir>/test* were no longer loaded as initial conftests when invoked without arguments.
  This could cause certain hooks (like pytest_addoption) in these files to not fire.

astral-sh/ruff (ruff)

v0.15.19

Compare Source

Released on 2026-06-23.

Preview features

• Support human-readable names when hovering suppression comments and in code actions (#​26114)

Bug fixes

• Fall back to default settings when editor-only settings are invalid (#​26244)
• Fix panic when inserting text at a notebook cell boundary (#​26111)

Rule changes

• [pylint] Update fix suggestions for __floor__, __trunc__, __length_hint__, and __matmul__ variants (PLC2801) (#​26239)

Performance

• Avoid allocating when parsing single string literals (#​26200)
• Avoid reallocating singleton call arguments (#​26223)
• Lazily create source files for lint diagnostics (#​26226)
• Optimize formatter text width and indentation (#​26236)
• Reserve capacity for builtin bindings (#​26229)
• Skip repeated-key checks for singleton dictionaries (#​26228)
• Use ArrayVec for qualified name segments (#​26224)

Documentation

• [flake8-pyi] Note that PYI051 is an opinionated stylistic rule (#​26179)
• [pyupgrade] Clarify UP029 as a Python 2 compatibility rule (#​26243)

Other changes

• Publish Ruff crates to crates.io (#​26271)

Contributors

• @​MakenRosa
• @​MichaReiser
• @​trilamsr
• @​ntBre
• @​sanjibani
• @​charliermarsh

astral-sh/ty (ty)

v0.0.53

Compare Source

Released on 2026-06-23.

Bug fixes

• Avoid bypassing lazy constraints for Divergent (#​26288)
• Avoid recursion when projecting narrowing constraints (#​26276)
• Fix ParamSpec callable signature extraction for callable instances (#​26279)
• Make multi-arm TypeOf cycle recovery monotonic (#​26275)

LSP server

• Document all special forms in ty_extensions (#​26263)

Performance

• Avoid cloning fallback condition flow snapshots (#​26203)
• Avoid constructing discarded speculative diagnostics (#​26251)
• Avoid path lookups when sorting same-file diagnostics (#​26257)
• Cache is_never_satisfied results (#​26261)
• Defer applying type context to simple standalone expressions (#​26252)

Core type checking

• Infer types for names bound in match patterns (#​25940)
• Preserve regular kind for callable instances (#​26253)
• Simplify intersections of invariant generic types with Any specializations (#​26127)

Contributors

• @​charliermarsh
• @​MichaReiser
• @​AlexWaygood
• @​sharkdp
• @​ibraheemdev
• @​carljm

v0.0.52

Compare Source

Released on 2026-06-22.

Bug fixes

• Avoid shadowing hints for attribute assignments (#​26164)
• Fix dict.pop overloads to accept arbitrary keys with defaults (#​26241)
• Normalize recursive TypeOf across multiple union arms (#​26230)
• Normalize recursive TypeOf growth during cycle recovery (#​26163)
• Normalize recursive protocol growth during cycle recovery (#​26246)
• Preserve generic alias identity during cycle recovery (#​26166)
• Recover from dynamic class code generator cycles (#​26167)

LSP server

• Add a go-to destination for Divergent (#​26162)
• Publish diagnostics for all open files after a single file is saved (#​25929)
• Render Markdown for reStructuredText fields in docstrings on hover (#​25903)

CLI

• Make error-on-warning the default (#​26157)

Diagnostics

• Make rendering of fix diffs more concise (#​26161)

Performance

• Avoid allocating disabled error context trees (#​26191)
• Avoid lookup maps for small place tables (#​26177)
• Avoid moving boxed use-def map builders (#​26211)
• Avoid transient AST ID merge map (#​26185)
• Batch signature typevar freshness scans (#​26196)
• Box large semantic index builders (#​26186)
• Build frozen definition maps directly (#​26188)
• Compact use-def binding interner keys (#​26193)
• Consume condition flow snapshots (#​26189)
• Lazily allocate reachability caches (#​26194)
• Remove redundant use-def state shrinking (#​26206)
• Reuse the first union bindings buffer (#​26225)
• Short-circuit terminal narrowing constraints (#​26215)
• Solve simple constraint conjunctions directly (#​25879)
• Store cycle-detector cache entries inline (#​26183)
• Stream indexed AST construction (#​26184)
• Suppress discarded TypedDict diagnostics (#​26250)
• Use SmallVec for CycleDetector::seen (#​26181)
• Use a SmallVec for seen type aliases (#​26187)

Core type checking

• Raise limit for number of non-recursive union literals (#​25212)
• Preserve gradual behavior for explicit Any subclasses (#​26034)
• Preserve metaclasses when inheriting from intersection-typed bases (#​26145)
• Recognize exhaustive matches over finite tuples (#​26132)

Contributors

• @​JamBalaya56562
• @​AlexWaygood
• @​carljm
• @​Minibrams
• @​lerebear
• @​MichaReiser
• @​charliermarsh

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