diff --git a/python/tests/test_genotype_matching.py b/python/tests/test_genotype_matching.py
index 1168095879..01c8b40a59 100644
--- a/python/tests/test_genotype_matching.py
+++ b/python/tests/test_genotype_matching.py
@@ -1,10 +1,10 @@
 import copy
 import itertools
-import pytest
 
 import lshmm as ls
 import msprime
 import numpy as np
+import pytest
 
 import tskit