diff --git a/tests/lint/line_length.py b/tests/lint/line_length.py
index 2b82b190..28f25547 100755
--- a/tests/lint/line_length.py
+++ b/tests/lint/line_length.py
@@ -43,7 +43,7 @@ def endswithstring(line):
 
 
 def main():
-    """Check each file provided as a command line parameter
+    """Check each file provided as a command line parameter.
 
     Returns
     -------