chore(tests): run tests in parallel

Author: stainless-app[bot]

pyproject.toml

@@ -56,7 +56,8 @@ dev-dependencies = [
     "importlib-metadata>=6.7.0",
     "rich>=13.7.1",
     "inline-snapshot >=0.7.0",
-    "nest_asyncio==1.6.0"
+    "nest_asyncio==1.6.0",
+    "pytest-xdist>=3.6.1",
 ]
 
 [tool.rye.scripts]
@@ -128,7 +129,7 @@ replacement = '[\1](https://github.com/writer/writer-python/tree/main/\g<2>)'
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]
-addopts = "--tb=short"
+addopts = "--tb=short -n auto"
 xfail_strict = true
 asyncio_mode = "auto"
 asyncio_default_fixture_loop_scope = "session"

requirements-dev.lock

@@ -34,6 +34,8 @@ exceptiongroup==1.2.2
     # via pytest
 executing==2.2.0
     # via inline-snapshot
+execnet==2.1.1
+    # via pytest-xdist
 filelock==3.12.4
     # via virtualenv
 h11==0.14.0
@@ -79,7 +81,9 @@ pygments==2.18.0
 pyright==1.1.399
 pytest==8.3.3
     # via pytest-asyncio
+    # via pytest-xdist
 pytest-asyncio==0.24.0
+pytest-xdist==3.7.0
 python-dateutil==2.8.2
     # via time-machine
 pytz==2023.3.post1