diff --git a/conf/real-from-ideal/namelists.yml b/conf/real-from-ideal/namelists.yml
index 63a4326e05952ea5f5dcbe90e7d8fdfba45d1fe9..8d69ba59965bc85ea5c5af75d61a80f5c0dc671c 100644
--- a/conf/real-from-ideal/namelists.yml
+++ b/conf/real-from-ideal/namelists.yml
@@ -3,7 +3,6 @@ atmosphere_namelist_ideal: |
   /
   &output_nml
     steps_per_file              = 1
-  20201001
     output_start                = '2020-10-01T06:00:00Z'
     output_end                  = '2020-10-01T06:00:00Z'
     output_filename             = "init-test-ext"