diff --git a/tests/test_wbemd.py b/tests/test_wbemd.py
index 9c256b8bd..9ca4897a8 100644
--- a/tests/test_wbemd.py
+++ b/tests/test_wbemd.py
@@ -10,7 +10,7 @@
 
 
 def _smoothed_disk_image(x, y, radius, width, height):
-    (Y, X) = mgrid[:height, :width]
+    Y, X = mgrid[:height, :width]
     ratio = ((X - x) ** 2 + (Y - y) ** 2) / (radius**2)
     return 2.0 - 2 / (1 + np.exp(-ratio))  # Scaled sigmoid funciton