cb.diff

diff --git a/test/test_knownservers.py b/test/test_knownservers.py
index e53c0d0..19bde9d 100644
--- a/test/test_knownservers.py
+++ b/test/test_knownservers.py
@@ -30,7 +30,7 @@ def known_servers():
         ('Cloudflare', 'cloudflare-dns.com', '/dns-query'),
         # Not supporting draft-13?
         # Received b'{DoH-server}: Error x09: Request not valid
-        # ('CleanBrowsing', 'doh.cleanbrowsing.org', '/doh/family-filter'),
+        ('CleanBrowsing', 'doh.cleanbrowsing.org', '/doh/family-filter/'),
         ('@chantra', 'dns.dnsoverhttps.net', '/dns-query'),
         ('@jedisct1', 'doh.crypto.sx', '/dns-query'),
         # Timeout