diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 93a515f86e..3593f3a15e 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -186,7 +186,7 @@ test1439 test1440 test1441 test1442 test1443 test1444 test1445 test1446 \
 test1447 test1448 test1449 test1450 test1451 test1452 test1453 test1454 \
 test1455 test1456 test1457 test1458 test1459 test1460 test1461 test1462 \
 test1463 test1464 test1465 test1466 test1467 test1468 test1469 test1470 \
-test1471 test1472 test1473 test1474 test1475 \
+test1471 test1472 test1473 test1474 test1475 test1476 \
 \
 test1500 test1501 test1502 test1503 test1504 test1505 test1506 test1507 \
 test1508 test1509 test1510 test1511 test1512 test1513 test1514 test1515 \
diff --git a/tests/data/test1476 b/tests/data/test1476
new file mode 100644
index 0000000000..bc0c32d3a6
--- /dev/null
+++ b/tests/data/test1476
@@ -0,0 +1,58 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP GET
+cookies
+</keywords>
+</info>
+
+# Server-side
+<reply>
+
+<data crlf="yes">
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Content-Length: 0
+Set-Cookie: super=oops; domain=co.UK; path=/
+Set-Cookie: fine=yesyes; domain=CURL.CO.UK; path=/
+
+</data>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+<name>
+PSL violating cookie with mixed case domain and cookie domain property
+</name>
+<command>
+-x http://%HOSTIP:%HTTPPORT/%TESTNUMBER http://curl.co.UK -c %LOGDIR/cookies%TESTNUMBER.txt
+</command>
+<features>
+PSL
+cookies
+</features>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+<protocol crlf="yes">
+GET http://curl.co.UK/ HTTP/1.1
+Host: curl.co.UK
+User-Agent: curl/%VERSION
+Accept: */*
+Proxy-Connection: Keep-Alive
+
+</protocol>
+<file name="%LOGDIR/cookies%TESTNUMBER.txt" mode="text">
+# Netscape HTTP Cookie File
+# https://curl.se/docs/http-cookies.html
+# This file was generated by libcurl! Edit at your own risk.
+
+.CURL.CO.UK	TRUE	/	FALSE	0	fine	yesyes
+</file>
+</verify>
+</testcase>