diff --git a/Lib/platform.py b/Lib/platform.py
index 279c96c771eddd..99f6a24b1ae959 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -500,7 +500,7 @@ def _syscmd_ver(system='', release='', version='',
 }
 
 def win32_is_iot(isIot=False):
-    if win32_editionId() == 'IoTUAP' or win32_editionId() == 'NanoServer' or win32_editionId() == 'WindowsCoreHeadless' or win32_editionId() == 'IoTEdgeOS':
+    if win32_editionId() in ('IoTUAP', 'NanoServer', 'WindowsCoreHeadless', 'IoTEdgeOS'):
         return True
     return False
 
diff --git a/Lib/test/test_mimetypes.py b/Lib/test/test_mimetypes.py
index 6b4dae28132052..1c281cf900e050 100644
--- a/Lib/test/test_mimetypes.py
+++ b/Lib/test/test_mimetypes.py
@@ -93,7 +93,7 @@ def tearDown(self):
         mimetypes.types_map.clear()
         mimetypes.types_map.update(self.original_types_map)
 
-    @unittest.skipIf(win32_editionId() == 'NanoServer' or win32_editionId() == 'WindowsCoreHeadless' or win32_editionId() == 'IoTEdgeOS', "mime types registry keys not available on NanoServer")
+    @unittest.skipIf(win32_editionId() in ('NanoServer', 'WindowsCoreHeadless', 'IoTEdgeOS'), "mime types registry keys not available on NanoServer")
     def test_registry_parsing(self):
         # the original, minimum contents of the MIME database in the
         # Windows registry is undocumented AFAIK.
diff --git a/Lib/test/test_winreg.py b/Lib/test/test_winreg.py
index 78bc183c0b4a95..fcdd0b78577647 100644
--- a/Lib/test/test_winreg.py
+++ b/Lib/test/test_winreg.py
@@ -399,7 +399,7 @@ def test_named_arguments(self):
         DeleteKeyEx(key=HKEY_CURRENT_USER, sub_key=test_key_name,
                     access=KEY_ALL_ACCESS, reserved=0)
 
-    @unittest.skipIf(win32_editionId() == 'WindowsCoreHeadless' or win32_editionId() == 'IoTEdgeOS', "APIs not available on WindowsCoreHeadless")
+    @unittest.skipIf(win32_editionId() in ('WindowsCoreHeadless', 'IoTEdgeOS'), "APIs not available on WindowsCoreHeadless")
     def test_reflection_functions(self):
         # Test that we can call the query, enable, and disable functions
         # on a key which isn't on the reflection list with no consequences.