diff --git a/zerver/actions/message_send.py b/zerver/actions/message_send.py
index dcee9b4d8f..d16eedc791 100644
--- a/zerver/actions/message_send.py
+++ b/zerver/actions/message_send.py
@@ -775,7 +775,7 @@ def create_user_messages(
                 # automatically marked as read for yourself; scheduled
                 # messages to yourself only are not.
                 user_profile_id == sender_id
-                and message.sent_by_human()
+                and message.sending_client.default_read_by_sender()
                 and not scheduled_message_to_self
             )
             or user_profile_id in mark_as_read_user_ids
diff --git a/zerver/models.py b/zerver/models.py
index ad506b5153..f3d8d31d7b 100644
--- a/zerver/models.py
+++ b/zerver/models.py
@@ -2968,6 +2968,37 @@ class Client(models.Model):
     def __str__(self) -> str:
         return self.name
 
+    def default_read_by_sender(self) -> bool:
+        """Used to determine whether a message was sent by a full Zulip UI
+        style client (and thus whether the message should be treated
+        as sent by a human and automatically marked as read for the
+        sender).  The purpose of this distinction is to ensure that
+        message sent to the user by e.g. a Google Calendar integration
+        using the user's own API key don't get marked as read
+        automatically.
+        """
+        sending_client = self.name.lower()
+
+        return (
+            sending_client
+            in (
+                "zulipandroid",
+                "zulipios",
+                "zulipdesktop",
+                "zulipmobile",
+                "zulipelectron",
+                "zulipterminal",
+                "snipe",
+                "website",
+                "ios",
+                "android",
+            )
+            or "desktop app" in sending_client
+            # Since the vast majority of messages are sent by humans
+            # in Zulip, treat test suite messages as such.
+            or (sending_client == "test suite" and settings.TEST_SUITE)
+        )
+
 
 get_client_cache: Dict[str, Client] = {}
 
@@ -3235,39 +3266,6 @@ class Message(AbstractMessage):
             or rendered_content_version < markdown_version
         )
 
-    def sent_by_human(self) -> bool:
-        """Used to determine whether a message was sent by a full Zulip UI
-        style client (and thus whether the message should be treated
-        as sent by a human and automatically marked as read for the
-        sender).  The purpose of this distinction is to ensure that
-        message sent to the user by e.g. a Google Calendar integration
-        using the user's own API key don't get marked as read
-        automatically.
-        """
-        sending_client = self.sending_client.name.lower()
-
-        return (
-            (
-                sending_client
-                in (
-                    "zulipandroid",
-                    "zulipios",
-                    "zulipdesktop",
-                    "zulipmobile",
-                    "zulipelectron",
-                    "zulipterminal",
-                    "snipe",
-                    "website",
-                    "ios",
-                    "android",
-                )
-            )
-            or ("desktop app" in sending_client)
-            # Since the vast majority of messages are sent by humans
-            # in Zulip, treat test suite messages as such.
-            or (sending_client == "test suite" and settings.TEST_SUITE)
-        )
-
     @staticmethod
     def is_status_message(content: str, rendered_content: str) -> bool:
         """
diff --git a/zerver/tests/test_digest.py b/zerver/tests/test_digest.py
index 8868711e56..f09f907e61 100644
--- a/zerver/tests/test_digest.py
+++ b/zerver/tests/test_digest.py
@@ -547,7 +547,7 @@ class TestDigestEmailMessages(ZulipTestCase):
         self.assertEqual(stream_info["html"], [])
 
     def simulate_stream_conversation(self, stream: str, senders: List[str]) -> List[int]:
-        client = "website"  # this makes `sent_by_human` return True
+        client = "website"  # this makes `default_read_by_sender` return True
         sending_client = get_client(client)
         message_ids = []  # List[int]
         for sender_name in senders:
diff --git a/zerver/tests/test_message_flags.py b/zerver/tests/test_message_flags.py
index a7d46655a3..ed06849974 100644
--- a/zerver/tests/test_message_flags.py
+++ b/zerver/tests/test_message_flags.py
@@ -880,7 +880,7 @@ class GetUnreadMsgsTest(ZulipTestCase):
             # Check our test setup is correct--the message should
             # not have looked like it was sent by a human.
             message = Message.objects.get(id=message_id)
-            self.assertFalse(message.sent_by_human())
+            self.assertFalse(message.sending_client.default_read_by_sender())
 
             # And since it was not sent by a human, it should not
             # be read, not even by the sender (Hamlet).