move polluting test to its own thing

pyproject.toml

@@ -33,7 +33,7 @@ Code = "https://github.com//xontrib-pygitstatus"
 
 
 [project.optional-dependencies]
-dev = ["pytest>=7.0", "gitpython>=3.1.43"]
+dev = ["pytest>=7.0", "pytest-forked>=1.6.0", "gitpython>=3.1.43"]
 
 
 [build-system]

tests/test_autoload.py

@@ -0,0 +1,11 @@
+import pytest
+from xonsh.built_ins import XonshSession
+from xonsh.xontribs import xontribs_loaded
+
+
+@pytest.mark.forked  # this pollutes the pytest session
+def test_autoload(xonsh_session: XonshSession):
+    from xonsh.main import _autoload_xontribs
+
+    _autoload_xontribs({})
+    assert 'pygitstatus' in xontribs_loaded()

tests/test_xontrib.py

@@ -48,19 +48,12 @@ def prompts(load_xontrib: abc.Callable[[str], None],
     yield prompts
 
 
-# def test_autoload(load_xontrib):
-def test_autoload(xonsh_session: XonshSession):
-    from xonsh.main import _autoload_xontribs
-    _autoload_xontribs({})
-    assert 'pygitstatus' in xontribs_loaded()
-
-
 def test_clean(git_repo):
     with cd(git_repo):
         assert PromptFormatter()('{pygitstatus.clean}') == '{BOLD_GREEN}✓{RESET}'
 
 
-def test_untracked(git_repo, prompts):
+def test_untracked(git_repo):
     with cd(git_repo):
         Path('text.txt').touch()
         assert PromptFormatter()('{pygitstatus.untracked}') == '…1'