Move suppress_path_mangle to test_ccompiler to limit the scope.

Author: jaraco

conftest.py

@@ -92,7 +92,7 @@ def monkeysession(request):
     mpatch.undo()
 
 
-@pytest.fixture(autouse=True, scope="session")
+@pytest.fixture(scope="module")
 def suppress_path_mangle(monkeysession):
     """
     Disable the path mangling in CCompiler. Workaround for #169.

distutils/tests/test_ccompiler.py

@@ -7,6 +7,8 @@
 
 import pytest
 
+pytestmark = pytest.mark.usefixtures('suppress_path_mangle')
+
 
 def _make_strs(paths):
     """