diff --git a/bgcval2/analysis_timeseries.py b/bgcval2/analysis_timeseries.py
index 7d01b2a4..c397f380 100755
--- a/bgcval2/analysis_timeseries.py
+++ b/bgcval2/analysis_timeseries.py
@@ -123,7 +123,7 @@ def build_list_of_suite_keys(suites, debug=True):
 
         for key, keybool in keys_dict.items():
             if debug and key in analysis_keys:
-                print('build_list_of_suite_keys:\tKey exists in multiple suites:', key)
+                print(f'build_list_of_suite_keys:\tKey {key} exists in multiple suites:')
 
 
             if key in analysis_keys and keybool != analysis_keys[key]: