1 files changed, 10 insertions, 0 deletions
diff --git a/Lib/distutils/tests/test_build_clib.py b/Lib/distutils/tests/test_build_clib.py
index abd8313..19e012a 100644
--- a/Lib/distutils/tests/test_build_clib.py
+++ b/Lib/distutils/tests/test_build_clib.py
@@ -2,6 +2,7 @@
 import unittest
 import os
 import sys
+import sysconfig
 
 from test.support import run_unittest, missing_compiler_executable
 
@@ -13,6 +14,15 @@ class BuildCLibTestCase(support.TempdirManager,
                         support.LoggingSilencer,
                         unittest.TestCase):
 
+    def setUp(self):
+        super().setUp()
+        self._backup_CONFIG_VARS = dict(sysconfig._CONFIG_VARS)
+
+    def tearDown(self):
+        super().tearDown()
+        sysconfig._CONFIG_VARS.clear()
+        sysconfig._CONFIG_VARS.update(self._backup_CONFIG_VARS)
+
     def test_check_library_dist(self):
         pkg_dir, dist = self.create_dist()
         cmd = build_clib(dist)