diff --git a/tests/test-help.out b/tests/test-help.out
--- a/tests/test-help.out
+++ b/tests/test-help.out
@@ -179,6 +179,7 @@ options:
  -a --text                 treat all files as text
  -p --show-function        show which function each change is in
  -g --git                  use git extended diff format
+ -D --nodates              don't include dates in diff headers
  -w --ignore-all-space     ignore white space when comparing lines
  -b --ignore-space-change  ignore changes in the amount of white space
  -B --ignore-blank-lines   ignore changes whose lines are all blank