diff --git a/test/parser/property_params.ics b/test/parser/property_params.ics
index 6fbc1094..7fb411d0 100644
--- a/test/parser/property_params.ics
+++ b/test/parser/property_params.ics
@@ -9,6 +9,7 @@ ATTENDEE;DELEGATED-TO="mailto:foo7@bar";CN="Foo, Bar":mailto:foo5@bar
 ATTENDEE;DELEGATED-TO="mailto:foo7@bar";CN="Foo; Bar":mailto:foo6@bar
 ATTENDEE;ROLE="REQ-PARTICIPANT;foo";DELEGATED-FROM="mailto:bar@baz.com";PAR
  TSTAT=ACCEPTED;RSVP=TRUE:mailto:foo@bar.com
+ATTENDEE;CN="Z\;":mailto:z@example.org
 X-FOO;PARAM1=VAL1:FOO;BAR
 X-FOO2;PARAM1=VAL1;PARAM2=VAL2:FOO;BAR
 X-BAR;PARAM1="VAL1:FOO":BAZ;BAR
diff --git a/test/parser/property_params.json b/test/parser/property_params.json
index 65ef665d..61a517d6 100644
--- a/test/parser/property_params.json
+++ b/test/parser/property_params.json
@@ -69,6 +69,14 @@
       "cal-address",
       "mailto:foo@bar.com"
     ],
+    [
+      "attendee",
+      {
+        "cn": "Z\\;"
+      },
+      "cal-address",
+      "mailto:z@example.org"
+    ],
     [
       "x-foo",
       {