diff --git a/protocol.py b/protocol.py
index f90687d..dc0df59 100644
--- a/protocol.py
+++ b/protocol.py
@@ -81,10 +81,10 @@ class Protocol:
           :class:`Protocol` subclass, or None if the provided domain or request
             hostname domain is not a subdomain of brid.gy or isn't a known protocol
         """
-        return Protocol.for_domain(request.host, fed=fed)
+        return Protocol.for_bridgy_subdomain(request.host, fed=fed)
 
     @staticmethod
-    def for_domain(domain_or_url, fed=None):
+    def for_bridgy_subdomain(domain_or_url, fed=None):
         """Returns the protocol for a brid.gy subdomain.
 
         Args:
@@ -183,10 +183,10 @@ class Protocol:
 
         # step 1: check for our per-protocol subdomains
         if util.is_web(id):
-            by_domain = Protocol.for_domain(id)
-            if by_domain:
-                logger.info(f'  {by_domain.__name__} owns {id}')
-                return by_domain
+            by_subdomain = Protocol.for_bridgy_subdomain(id)
+            if by_subdomain:
+                logger.info(f'  {by_subdomain.__name__} owns {id}')
+                return by_subdomain
 
         # step 2: check if any Protocols say conclusively that they own it
         # sort to be deterministic
diff --git a/tests/test_protocol.py b/tests/test_protocol.py
index 751f6eb..6f3f434 100644
--- a/tests/test_protocol.py
+++ b/tests/test_protocol.py
@@ -44,7 +44,7 @@ class ProtocolTest(TestCase):
         self.assertEqual(Web, PROTOCOLS['web'])
         self.assertEqual(Web, PROTOCOLS['webmention'])
 
-    def test_for_domain_for_request(self):
+    def test_for_bridgy_subdomain_for_request(self):
         for domain, expected in [
                 ('fake.brid.gy', Fake),
                 ('ap.brid.gy', ActivityPub),
@@ -60,11 +60,11 @@ class ProtocolTest(TestCase):
                 ('fake.com', None),
         ]:
             with self.subTest(domain=domain, expected=expected):
-                self.assertEqual(expected, Protocol.for_domain(domain))
+                self.assertEqual(expected, Protocol.for_bridgy_subdomain(domain))
                 with app.test_request_context('/foo', base_url=f'https://{domain}/'):
                     self.assertEqual(expected, Protocol.for_request())
 
-    def test_for_domain_for_request_fed(self):
+    def test_for_bridgy_subdomain_for_request_fed(self):
         for url, expected in [
             ('https://fed.brid.gy/', Fake),
             ('http://localhost/foo', Fake),
@@ -72,7 +72,8 @@ class ProtocolTest(TestCase):
             ('https://baz/biff', None),
         ]:
             with self.subTest(url=url, expected=expected):
-                self.assertEqual(expected, Protocol.for_domain(url, fed=Fake))
+                self.assertEqual(expected,
+                                 Protocol.for_bridgy_subdomain(url, fed=Fake))
                 with app.test_request_context('/foo', base_url=url):
                     self.assertEqual(expected, Protocol.for_request(fed=Fake))
 
diff --git a/webfinger.py b/webfinger.py
index c45771c..327b5c2 100644
--- a/webfinger.py
+++ b/webfinger.py
@@ -50,7 +50,7 @@ class Webfinger(flask_util.XrdOrJrd):
         cls = None
         try:
             user, id = util.parse_acct_uri(resource)
-            cls = Protocol.for_domain(id, fed=Web)
+            cls = Protocol.for_bridgy_subdomain(id, fed=Web)
             if cls:
                 id = user
                 allow_indirect = True