diff --git a/src/integration_tests/caldav/resources/rfc4791_appb.ics b/src/integration_tests/caldav/resources/rfc4791_appb.ics
index 6727518..ea74a96 100644
--- a/src/integration_tests/caldav/resources/rfc4791_appb.ics
+++ b/src/integration_tests/caldav/resources/rfc4791_appb.ics
@@ -41,7 +41,7 @@ DTSTART;TZID=US/Eastern:20060104T140000
 DURATION:PT1H
 RECURRENCE-ID;TZID=US/Eastern:20060104T120000
 SUMMARY:Event #2 bis
-UID:00959BC664CA650E933C892C@example.com
+UID:abcd2
 END:VEVENT
 BEGIN:VEVENT
 ATTENDEE;PARTSTAT=ACCEPTED;ROLE=CHAIR:mailto:cyrus@example.com