1 files changed, 16 insertions, 0 deletions
diff --git a/Lib/test/test_platform.py b/Lib/test/test_platform.py
index 3688cc4267b..479649053ab 100644
--- a/Lib/test/test_platform.py
+++ b/Lib/test/test_platform.py
@@ -133,6 +133,22 @@ class PlatformTest(unittest.TestCase):
             for terse in (False, True):
                 res = platform.platform(aliased, terse)
 
+    def test__platform(self):
+        for src, res in [
+            ('foo bar', 'foo_bar'),
+            (
+                '1/2\\3:4;5"6(7)8(7)6"5;4:3\\2/1',
+                '1-2-3-4-5-6-7-8-7-6-5-4-3-2-1'
+            ),
+            ('--', ''),
+            ('-f', '-f'),
+            ('-foo----', '-foo'),
+            ('--foo---', '-foo'),
+            ('---foo--', '-foo'),
+        ]:
+            with self.subTest(src=src):
+                self.assertEqual(platform._platform(src), res)
+
     def test_system(self):
         res = platform.system()