diff --git a/examples/CosmoVolume/cosmoVolume.yml b/examples/CosmoVolume/cosmoVolume.yml
index f83657ac49e2a123251d22b545cb309573aae98a..bafb12d65fb9a2e9ffec1cdc41f12d6ea5d54c9d 100644
--- a/examples/CosmoVolume/cosmoVolume.yml
+++ b/examples/CosmoVolume/cosmoVolume.yml
@@ -32,8 +32,7 @@ Snapshots:
 # Parameters governing the conserved quantities statistics
 Statistics:
   delta_time:          1e-2 # Time between statistics output
-  energy_file_name:    energy
-  timestep_file_name:  timestep # No underscores ("_") allowed in file name 
+  
 
 # Parameters for the hydrodynamics scheme
 SPH: