diff --git a/test/diff/_ipr_about_ b/test/diff/_ipr_about_
new file mode 100644
index 000000000..39e92cd75
--- /dev/null
+++ b/test/diff/_ipr_about_
@@ -0,0 +1,7 @@
+--- https://datatracker.ietf.org/public/ipr_disclosure.cgi 
++++ /ipr/about/ 
+@@ -5,2 +5,2 @@
+-Technology" (updated by RFC4879, "Clarification of the Thrid Party
+-Disclosure Procedure in RFC3979".)
++Technology" (updated by RFC4879, "Clarification of the Third Party
++Disclosure Procedure in RFC3979").
\ No newline at end of file