diff --git a/Tests/helper.py b/Tests/helper.py
index e7b0db1d6..764935f87 100644
--- a/Tests/helper.py
+++ b/Tests/helper.py
@@ -9,7 +9,6 @@ import os
 import shutil
 import subprocess
 import sys
-import sysconfig
 import tempfile
 from collections.abc import Sequence
 from functools import lru_cache
@@ -342,10 +341,6 @@ def is_pypy() -> bool:
     return hasattr(sys, "pypy_translation_info")
 
 
-def is_mingw() -> bool:
-    return sysconfig.get_platform() == "mingw"
-
-
 class CachedProperty:
     def __init__(self, func: Callable[[Any], Any]) -> None:
         self.func = func