diff --git a/radicale/tests/static/event_multiple_case_sensitive_uids.ics b/radicale/tests/static/event_multiple_case_sensitive_uids.ics
new file mode 100644
index 0000000..ffca585
--- /dev/null
+++ b/radicale/tests/static/event_multiple_case_sensitive_uids.ics
@@ -0,0 +1,16 @@
+BEGIN:VCALENDAR
+PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN
+VERSION:2.0
+BEGIN:VEVENT
+UID:event
+SUMMARY:Event 1
+DTSTART:20130901T190000
+DTEND:20130901T200000
+END:VEVENT
+BEGIN:VEVENT
+UID:EVENT
+SUMMARY:Event 2
+DTSTART:20130901T200000
+DTEND:20130901T210000
+END:VEVENT
+END:VCALENDAR
diff --git a/radicale/tests/test_base.py b/radicale/tests/test_base.py
index c025493..5ea37bf 100644
--- a/radicale/tests/test_base.py
+++ b/radicale/tests/test_base.py
@@ -243,6 +243,13 @@ permissions: RrWw""")
             for uid2 in uids[i + 1:]:
                 assert uid1 != uid2
 
+    def test_put_whole_calendar_case_sensitive_uids(self) -> None:
+        """Create a whole calendar with case-sensitive UIDs."""
+        events = get_file_content("event_multiple_case_sensitive_uids.ics")
+        self.put("/calendar.ics/", events)
+        _, answer = self.get("/calendar.ics/")
+        assert "\r\nUID:event\r\n" in answer and "\r\nUID:EVENT\r\n" in answer
+
     def test_put_whole_addressbook(self) -> None:
         """Create and overwrite a whole addressbook."""
         contacts = get_file_content("contact_multiple.vcf")