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-rw-r--r--Lib/distutils/tests/test_build_ext.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/distutils/tests/test_build_ext.py b/Lib/distutils/tests/test_build_ext.py
index 90f7bb06691..8e7364d2a2c 100644
--- a/Lib/distutils/tests/test_build_ext.py
+++ b/Lib/distutils/tests/test_build_ext.py
@@ -35,6 +35,7 @@ class BuildExtTestCase(TempdirManager,
site.USER_BASE = self.mkdtemp()
from distutils.command import build_ext
build_ext.USER_BASE = site.USER_BASE
+ self.old_config_vars = dict(sysconfig._config_vars)
# bpo-30132: On Windows, a .pdb file may be created in the current
# working directory. Create a temporary working directory to cleanup
@@ -48,6 +49,8 @@ class BuildExtTestCase(TempdirManager,
site.USER_BASE = self.old_user_base
from distutils.command import build_ext
build_ext.USER_BASE = self.old_user_base
+ sysconfig._config_vars.clear()
+ sysconfig._config_vars.update(self.old_config_vars)
super(BuildExtTestCase, self).tearDown()
def build_ext(self, *args, **kwargs):