diff --git a/project/data_analysis/python/paper_plots/results_get_combined_null.py b/project/data_analysis/python/paper_plots/results_get_combined_null.py
index b2b28f7b..da7c15f3 100644
--- a/project/data_analysis/python/paper_plots/results_get_combined_null.py
+++ b/project/data_analysis/python/paper_plots/results_get_combined_null.py
@@ -1,5 +1,5 @@
 """
-This script test the bias and covariance of combined spectra
+This script compute combined null test
 """
 
 from pspy import so_dict, pspy_utils, so_spectra, so_cov