diff --git a/tardis/io/tests/test_config_reader.py b/tardis/io/tests/test_config_reader.py
index d9c932dc11b..998204efd85 100644
--- a/tardis/io/tests/test_config_reader.py
+++ b/tardis/io/tests/test_config_reader.py
@@ -116,7 +116,9 @@ def test_supernova_section_config(tardis_config_verysimple):
             conf.supernova.luminosity_wavelength_start.value
             < conf.supernova.luminosity_wavelength_end.value
         ):
-            raise ValueError("End Limit must be greater than Start Limit for Luminosity")
+            raise ValueError(
+                "End Limit must be greater than Start Limit for Luminosity"
+            )
     assert ve.type is ValueError