diff --git a/tests/constraint_tests.py b/tests/constraint_tests.py
index dc7e38447..28edc01bf 100644
--- a/tests/constraint_tests.py
+++ b/tests/constraint_tests.py
@@ -78,10 +78,12 @@ def compare_lp_files(self, filename, ignored=None, my_om=None):
 
                 # sometimes, 0.0 is printed, sometimes 0, harmonise that
                 exp_diff = [
-                    line.replace("0.0 ", "0 ").replace("= 0.0", "= 0") for line in exp_diff
+                    line.replace("0.0 ", "0 ").replace("= 0.0", "= 0")
+                    for line in exp_diff
                 ]
                 gen_diff = [
-                    line.replace("0.0 ", "0 ").replace("= 0.0", "= 0") for line in exp_diff
+                    line.replace("0.0 ", "0 ").replace("= 0.0", "= 0")
+                    for line in exp_diff
                 ]
 
                 assert len(exp_diff) == len(gen_diff)