diff --git a/test/test_compilation/test_compilation.py b/test/test_compilation/test_compilation.py
index 15f62ec5..11bb197b 100644
--- a/test/test_compilation/test_compilation.py
+++ b/test/test_compilation/test_compilation.py
@@ -84,7 +84,7 @@ class FileTest(unittest.TestCase, metaclass=dynamic.DynamicTest):
                         )
 
             # Check compilation
-            if not 'TRAVIS' in os.environ:
+            if 'TRAVIS' not in os.environ:
                 # Travis does not support lualatex compilation yet
                 self.assertEqual(0, self.compile_songbook(songbook))