diff --git a/inequality/tests/test_indices.py b/inequality/tests/test_indices.py
index f9a3c0b..a0f76e7 100644
--- a/inequality/tests/test_indices.py
+++ b/inequality/tests/test_indices.py
@@ -1,16 +1,32 @@
 import numpy
 import pytest
 
-from inequality._indices import (abundance, ellison_glaeser_egg,
-                                 ellison_glaeser_egg_pop, fractionalization_gs,
-                                 gini_gi, gini_gi_m, gini_gig, herfindahl_hd,
-                                 hoover_hi, isolation_ii, isolation_isg,
-                                 margalev_md, maurel_sedillot_msg,
-                                 maurel_sedillot_msg_pop, menhinick_mi,
-                                 modified_segregation_msg, polarization,
-                                 segregation_gsg, shannon_se, similarity_w_wd,
-                                 simpson_sd, simpson_so, theil_th,
-                                 theil_th_brute)
+from inequality._indices import (
+    abundance,
+    ellison_glaeser_egg,
+    ellison_glaeser_egg_pop,
+    fractionalization_gs,
+    gini_gi,
+    gini_gi_m,
+    gini_gig,
+    herfindahl_hd,
+    hoover_hi,
+    isolation_ii,
+    isolation_isg,
+    margalev_md,
+    maurel_sedillot_msg,
+    maurel_sedillot_msg_pop,
+    menhinick_mi,
+    modified_segregation_msg,
+    polarization,
+    segregation_gsg,
+    shannon_se,
+    similarity_w_wd,
+    simpson_sd,
+    simpson_so,
+    theil_th,
+    theil_th_brute,
+)
 
 x = numpy.array([[0, 1, 2], [0, 2, 4], [0, 0, 3]])