diff --git a/inequality/tests/test_theil.py b/inequality/tests/test_theil.py
index e491d14..ec1008d 100644
--- a/inequality/tests/test_theil.py
+++ b/inequality/tests/test_theil.py
@@ -47,8 +47,8 @@ def test___init__(self):
                 ]
             ),
         )
-        y = numpy.array([0,0,0,10,10,10])
-        regions = numpy.array([0,0,0,1,1,1])
+        y = numpy.array([0, 0, 0, 10, 10, 10])
+        regions = numpy.array([0, 0, 0, 1, 1, 1])
         theil_d = TheilD(y, regions)
         numpy.testing.assert_almost_equal(theil_d.T, 0.6931471805599453)
         numpy.testing.assert_almost_equal(theil_d.bg, 0.6931471805599453)