diff --git a/lib/spack/spack/test/modules.py b/lib/spack/spack/test/modules.py
index 99cc280d27c..05a33494809 100644
--- a/lib/spack/spack/test/modules.py
+++ b/lib/spack/spack/test/modules.py
@@ -237,8 +237,10 @@ def test_alter_environment(self):
         self.assertEqual(
             len([x for x in content if 'setenv FOO "foo"' in x]), 0)
         self.assertEqual(len([x for x in content if 'unsetenv BAR' in x]), 0)
-        self.assertEqual(len([x for x in content if 'is-loaded foo/bar' in x]), 1)
-        self.assertEqual(len([x for x in content if 'module load foo/bar' in x]), 1)
+        self.assertEqual(
+            len([x for x in content if 'is-loaded foo/bar' in x]), 1)
+        self.assertEqual(
+            len([x for x in content if 'module load foo/bar' in x]), 1)
 
     def test_blacklist(self):
         spack.modules.CONFIGURATION = configuration_blacklist