Issue #28849: Merge 3.6.
diff --git a/Lib/test/test_sysconfig.py b/Lib/test/test_sysconfig.py
index a3baea8..694435f 100644
--- a/Lib/test/test_sysconfig.py
+++ b/Lib/test/test_sysconfig.py
@@ -385,7 +385,8 @@
         self.assertIsNotNone(vars['SO'])
         self.assertEqual(vars['SO'], vars['EXT_SUFFIX'])
 
-    @unittest.skipUnless(hasattr(sys.implementation, '_multiarch'),
+    @unittest.skipUnless(sys.platform == 'linux' and
+                         hasattr(sys.implementation, '_multiarch'),
                          'multiarch-specific test')
     def test_triplet_in_ext_suffix(self):
         ctypes = import_module('ctypes')