diff --git a/tardis/io/tests/test_config_reader.py b/tardis/io/tests/test_config_reader.py
index 637905707c7..d9c932dc11b 100644
--- a/tardis/io/tests/test_config_reader.py
+++ b/tardis/io/tests/test_config_reader.py
@@ -91,7 +91,7 @@ def test_model_section_config(tardis_config_verysimple):
             conf.model.structure.velocity.start
             < conf.model.structure.velocity.stop
         ):
-            raise ValueError("Start Value is greater than Stop Value")
+            raise ValueError("Stop Value must be greater than Start Value")
     assert ve.type is ValueError
 
 
@@ -116,7 +116,7 @@ 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 Start Limit for Luminosity")
+            raise ValueError("End Limit must be greater than Start Limit for Luminosity")
     assert ve.type is ValueError