diff --git a/configs/unittests/win_unittest.py b/configs/unittests/win_unittest.py
index 0b0a3701..2e8308bf 100644
--- a/configs/unittests/win_unittest.py
+++ b/configs/unittests/win_unittest.py
@@ -92,7 +92,7 @@
             "cmd": [
                 # when configs are consolidated this python path will only show
                 # for windows.
-                os.path.join(os.getcwd(), "build", "venv", "Scripts", "python"),
+                sys.executable,
                 "../scripts/external_tools/mouse_and_screen_resolution.py",
                 "--configuration-url",
                 "http://hg.mozilla.org/%(repo_path)s/raw-file/%(revision)s/" +
diff --git a/external_tools/mouse_and_screen_resolution.py b/external_tools/mouse_and_screen_resolution.py
index 7df6a0f3..e10a7402 100755
--- a/external_tools/mouse_and_screen_resolution.py
+++ b/external_tools/mouse_and_screen_resolution.py
@@ -111,7 +111,6 @@ class POINT(Structure):
     _fields_ = [("x", c_ulong), ("y", c_ulong)]
 
 def queryMousePosition():
-    global pt
     pt = POINT()
     windll.user32.GetCursorPos(byref(pt))
     return { "x": pt.x, "y": pt.y}