[Muguett-DBY]

test_instance_with_aware_datetime_any_tzinfo fails with python-dateutil 3.0.0 on unchanged master: tz.gettz("Europe/Paris") now supplies an IANA key, so pendulum.instance() preserves Europe/Paris. The test still expects the generic fallback's +02:00 name.

Use an explicit tz.tzoffset("custom", 7200) fixture, which has neither key nor localize. This keeps the test exercising conversion of a generic tzinfo to a fixed offset. The adjacent ZoneInfo test already covers preserving an IANA name. Runtime code and dependency constraints are unchanged.

Verified on Windows and Linux, Python 3.12 (validation run):

• The original test fails on unchanged master in both pure-Python and Rust-extension modes with dateutil 3.0.0.
• With this one-line change, the full suite passes in both modes with dateutil 2.9.0.post0 and 3.0.0. Benchmark timing is disabled; benchmark test bodies still run.
• The existing +02:00 assertion is retained.

Pull Request Check List

• Added tests for changed code. Updated the existing test's fixture; no runtime change.
• Updated documentation for changed code. Not applicable to a test-only correction.

AI-assisted with Codex. Reproduced while independently reviewing #1059; the same unrelated failure is noted in #1069.