Issues

• Path.glob doesn't find a file whose name differs only in case from a literal pattern under macOS simulation

  pytest-dev/pyfakefs#1347 · Filter by author gsnedders opened on Oct 1, 2026
  2

• fnmatch.filter and glob don't match uppercase names under Windows simulation

  pytest-dev/pyfakefs#1345 · Filter by author gsnedders opened on Oct 1, 2026
  2

• Path is replaced with FakePathlibPathModule instead of FakePath when imported directly

  pytest-dev/pyfakefs#1334 · Filter by author gioannidis opened on Sep 4, 2026
  1

• Agent-assisted search for thread races

  pytest-dev/pyfakefs#1321 · Filter by author jfindlay opened on May 1, 2026
  4

• fake_filesystem: RuntimeError "dictionary changed size during iteration" under concurrent mkdir

  pytest-dev/pyfakefs#1319 · Filter by author jfindlay opened on Apr 23, 2026
  1

• FakeOsModule.use_original is not thread-safe under asyncio.to_thread workloads

  pytest-dev/pyfakefs#1317 · Filter by author jfindlay opened on Apr 23, 2026
  5

• Test failures with "RuntimeError: dictionary changed size during iteration"

  pytest-dev/pyfakefs#1191 · Filter by author mrbean-bremen opened on Jun 24, 2025

• Make stand-alone usage of fake modules besides FakeOsModule possible

  enhancement
  pytest-dev/pyfakefs#1184 · Filter by author mrbean-bremen opened on Jun 17, 2025
  2

• problem with os.stat within eyed3.load when running multiple tests using fs based fixture

  limitation
  pytest-dev/pyfakefs#1105 · Filter by author stevenengland opened on Dec 26, 2024
  23

• Optionally poison modules known to not work with pyfakefs

  enhancement
  pytest-dev/pyfakefs#1089 · Filter by author gsnedders opened on Nov 7, 2024
  2

• os.mkfifo is not supported

  enhancement
  pytest-dev/pyfakefs#999 · Filter by author legaul-cisco opened on Apr 9, 2024
  4