Speed up tests execution

pyproject.toml

@@ -99,6 +99,7 @@ disallow_untyped_defs = false
 addopts = [
   # `pytest-xdist`:
   "--numprocesses=auto",
+  "--dist=worksteal",
 
   # Show 20 slowest invocations:
   "--durations=20",

tests/conftest.py

@@ -286,8 +286,8 @@ def pip_with_index_conf(make_pip_conf):
     )
 
 
-@pytest.fixture
-def make_package(tmp_path):
+@pytest.fixture(scope="session")
+def make_package(tmp_path_factory):
     """
     Make a package from a given name, version and list of required packages.
     """
@@ -303,7 +303,7 @@ def _make_package(name, version="0.1", install_requires=None, extras_require=Non
             ",".join(f"{package!r}" for package in install_requires)
         )
 
-        package_dir = tmp_path / "packages" / name / version
+        package_dir = tmp_path_factory.mktemp("packages") / name / version
         package_dir.mkdir(parents=True)
 
         with (package_dir / "setup.py").open("w") as fp:
@@ -332,7 +332,7 @@ def _make_package(name, version="0.1", install_requires=None, extras_require=Non
     return _make_package
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 def run_setup_file():
     """
     Run a setup.py file from a given package dir.
@@ -350,7 +350,7 @@ def _run_setup_file(package_dir_path, *args):
     return _run_setup_file
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 def make_wheel(run_setup_file):
     """
     Make a wheel distribution from a given package dir.
@@ -408,12 +408,12 @@ def _make_module(fname, content):
     return _make_module
 
 
-@pytest.fixture
-def fake_dists(tmpdir, make_package, make_wheel):
+@pytest.fixture(scope="session")
+def fake_dists(tmp_path_factory, make_package, make_wheel):
     """
-    Generate distribution packages `small-fake-{a..f}`
+    Generate distribution packages `small-fake-*`
     """
-    dists_path = os.path.join(tmpdir, "dists")
+    dists_path = tmp_path_factory.mktemp("dists")
     pkgs = [
         make_package("small-fake-a", version="0.1"),
         make_package("small-fake-b", version="0.2"),

tests/test_cli_compile.py

@@ -2948,6 +2948,7 @@ def test_compile_recursive_extras(runner, tmp_path, current_resolver):
     out = runner.invoke(
         cli,
         [
+            "--no-build-isolation",
             "--no-header",
             "--no-annotate",
             "--no-emit-options",