Fix typo

Author: znicholls

tests/conftest.py

@@ -7,5 +7,5 @@
 import os
 import sys
 
-if os.environ.get("CI", "false") == "true" and sys.platform() == "win32":
-    os.add_dll_directory("C:\\ProgramData\\mingw64\\mingw64\\bin")
+if os.environ.get("CI", "false") == "true" and sys.platform == "win32":
+    os.add_dll_directory("C:\\mingw64\\bin")