Always install wheel in test venvs

Author: sbidoul

tests/conftest.py

@@ -429,6 +429,7 @@ def virtualenv_template(
     tmpdir_factory: pytest.TempPathFactory,
     pip_src: Path,
     setuptools_install: Path,
+    wheel_install: Path,
     coverage_install: Path,
 ) -> Iterator[VirtualEnvironment]:
 
@@ -442,8 +443,9 @@ def virtualenv_template(
     tmpdir = tmpdir_factory.mktemp("virtualenv")
     venv = VirtualEnvironment(tmpdir.joinpath("venv_orig"), venv_type=venv_type)
 
-    # Install setuptools and pip.
+    # Install setuptools, wheel and pip.
     install_pth_link(venv, "setuptools", setuptools_install)
+    install_pth_link(venv, "wheel", wheel_install)
     pip_editable = tmpdir_factory.mktemp("pip") / "pip"
     shutil.copytree(pip_src, pip_editable, symlinks=True)
     # noxfile.py is Python 3 only
@@ -503,7 +505,7 @@ def virtualenv(
 
 @pytest.fixture
 def with_wheel(virtualenv: VirtualEnvironment, wheel_install: Path) -> None:
-    install_pth_link(virtualenv, "wheel", wheel_install)
+    pass
 
 
 class ScriptFactory(Protocol):