diff --git a/src/pymor/algorithms/rules.py b/src/pymor/algorithms/rules.py
index 07b17512ce..7552605b35 100644
--- a/src/pymor/algorithms/rules.py
+++ b/src/pymor/algorithms/rules.py
@@ -46,7 +46,7 @@ def __repr__(self):
             from pygments import highlight
             from pygments.lexers import PythonLexer
             from pygments.formatters import Terminal256Formatter
-            return highlight(self.source, PythonLexer(), Terminal256Formatter(style='native'))
+            return highlight(self.source, PythonLexer(), Terminal256Formatter())
         except ImportError:
             return self.source