diff --git a/radicale/tests/static/event1.ics b/radicale/tests/static/event1.ics
index bc04d80a..4e669175 100644
--- a/radicale/tests/static/event1.ics
+++ b/radicale/tests/static/event1.ics
@@ -25,6 +25,7 @@ LAST-MODIFIED:20130902T150158Z
 DTSTAMP:20130902T150158Z
 UID:event1
 SUMMARY:Event
+CATEGORIES:some_category1,another_category2
 ORGANIZER:mailto:unclesam@example.com
 ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=TENTATIVE;CN=Jane Doe:MAILTO:janedoe@example.com
 ATTENDEE;ROLE=REQ-PARTICIPANT;DELEGATED-FROM="MAILTO:bob@host.com";PARTSTAT=ACCEPTED;CN=John Doe:MAILTO:johndoe@example.com
diff --git a/radicale/tests/test_base.py b/radicale/tests/test_base.py
index 5ea37bfb..6bd4b2f8 100644
--- a/radicale/tests/test_base.py
+++ b/radicale/tests/test_base.py
@@ -916,6 +916,22 @@ permissions: RrWw""")
             <C:text-match>event</C:text-match>
         </C:prop-filter>
     </C:comp-filter>
+</C:comp-filter>"""])
+        assert "/calendar.ics/event1.ics" in self._test_filter(["""\
+<C:comp-filter name="VCALENDAR">
+    <C:comp-filter name="VEVENT">
+        <C:prop-filter name="CATEGORIES">
+            <C:text-match>some_category1</C:text-match>
+        </C:prop-filter>
+    </C:comp-filter>
+</C:comp-filter>"""])
+        assert "/calendar.ics/event1.ics" in self._test_filter(["""\
+<C:comp-filter name="VCALENDAR">
+    <C:comp-filter name="VEVENT">
+        <C:prop-filter name="CATEGORIES">
+            <C:text-match collation="i;octet">some_category1</C:text-match>
+        </C:prop-filter>
+    </C:comp-filter>
 </C:comp-filter>"""])
         assert "/calendar.ics/event1.ics" not in self._test_filter(["""\
 <C:comp-filter name="VCALENDAR">