diff --git a/workflow/scripts/check_design.py b/workflow/scripts/check_design.py
index acf4f014f2c4ed24d25da9bd5e268ace9bd2fadd..52185d6f6adde130a34cc593b8fe4f113e9b3879 100644
--- a/workflow/scripts/check_design.py
+++ b/workflow/scripts/check_design.py
@@ -26,11 +26,11 @@ def get_args():
         formatter_class=argparse.RawDescriptionHelpFormatter)
 
     parser.add_argument('-d', '--design',
-                        help="The design file to run QC (TSV format).",
+                        help="The design file to run QC (tsv format).",
                         required=True)
 
     parser.add_argument('-f', '--fastq',
-                        help="File with list of fastq files (csv format).",
+                        help="File with list of fastq files (tsv format).",
                         required=True)
 
     parser.add_argument('-p', '--paired',