diff --git a/Lib/test/test_ctypes/test_errno.py b/Lib/test/test_ctypes/test_errno.py
index 65d99c1e492abe..0c528d4336e020 100644
--- a/Lib/test/test_ctypes/test_errno.py
+++ b/Lib/test/test_ctypes/test_errno.py
@@ -47,7 +47,7 @@ def _worker():
         set_errno(0)
 
     @unittest.skipUnless(os.name == "nt", 'Test specific to Windows')
-    def test_GetLastError(self):
+    def test_get_last_error(self):
         dll = ctypes.WinDLL("kernel32", use_last_error=True)
         GetModuleHandle = dll.GetModuleHandleA
         GetModuleHandle.argtypes = [c_wchar_p]