diff --git a/test/diff/_idtracker_ b/test/diff/_idtracker_
new file mode 100644
index 000000000..818e2e884
--- /dev/null
+++ b/test/diff/_idtracker_
@@ -0,0 +1,11 @@
+--- https://datatracker.ietf.org/public/pidtracker.cgi 
++++ /idtracker/ 
+@@ -68,1 +68,1 @@
+-None
++--All Substates
+@@ -73,1 +73,0 @@
+---All Substates
+@@ -86,3 +85,0 @@
+-Did you find a bug? Let us know.
+-Any question or suggestion?
+-This page produced by the IETF Secretariat for the IESG
\ No newline at end of file