diff --git a/src/m2d/converters/event-to-message.js b/src/m2d/converters/event-to-message.js
index 96732ec..5b7d0f4 100644
--- a/src/m2d/converters/event-to-message.js
+++ b/src/m2d/converters/event-to-message.js
@@ -558,7 +558,7 @@ async function eventToMessage(event, guild, channel, di) {
 	if (member.displayname) displayName = member.displayname
 	if (member.avatar_url) avatarURL = mxUtils.getPublicUrlForMxc(member.avatar_url)
 	// Override display name and avatar from MSC4144 per-message profile if present
-	const perMessageProfile = event.content["m.per_message_profile"] || event.content["com.beeper.per_message_profile"]
+	const perMessageProfile = event.content["com.beeper.per_message_profile"]
 	if (perMessageProfile?.displayname) displayName = perMessageProfile.displayname
 	if (perMessageProfile?.avatar_url) avatarURL = mxUtils.getPublicUrlForMxc(perMessageProfile.avatar_url)
 	// If the display name is too long to be put into the webhook (80 characters is the maximum),
diff --git a/src/m2d/converters/event-to-message.test.js b/src/m2d/converters/event-to-message.test.js
index 1c37b7a..2a204e9 100644
--- a/src/m2d/converters/event-to-message.test.js
+++ b/src/m2d/converters/event-to-message.test.js
@@ -5526,40 +5526,7 @@ test("event2message: known and unknown emojis in the end are used for sprite she
 	)
 })
 
-test("event2message: m.per_message_profile overrides displayname and avatar_url", async t => {
-	t.deepEqual(
-		await eventToMessage({
-			type: "m.room.message",
-			sender: "@cadence:cadence.moe",
-			content: {
-				msgtype: "m.text",
-				body: "hello from a custom profile",
-				"m.per_message_profile": {
-					id: "custom-id",
-					displayname: "Custom Name",
-					avatar_url: "mxc://maunium.net/hgXsKqlmRfpKvCZdUoWDkFQo"
-				}
-			},
-			event_id: "$g07oYSZFWBkxohNEfywldwgcWj1hbhDzQ1sBAKvqOOU",
-			room_id: "!kLRqKKUQXcibIMtOpl:cadence.moe"
-		}),
-		{
-			ensureJoined: [],
-			messagesToDelete: [],
-			messagesToEdit: [],
-			messagesToSend: [{
-				username: "Custom Name",
-				content: "hello from a custom profile",
-				avatar_url: "https://bridge.example.org/download/matrix/maunium.net/hgXsKqlmRfpKvCZdUoWDkFQo",
-				allowed_mentions: {
-					parse: ["users", "roles"]
-				}
-			}]
-		}
-	)
-})
-
-test("event2message: com.beeper.per_message_profile (unstable prefix) overrides displayname and avatar_url", async t => {
+test("event2message: com.beeper.per_message_profile overrides displayname and avatar_url", async t => {
 	t.deepEqual(
 		await eventToMessage({
 			type: "m.room.message",
@@ -5592,42 +5559,6 @@ test("event2message: com.beeper.per_message_profile (unstable prefix) overrides
 	)
 })
 
-test("event2message: m.per_message_profile takes priority over com.beeper.per_message_profile", async t => {
-	t.deepEqual(
-		await eventToMessage({
-			type: "m.room.message",
-			sender: "@cadence:cadence.moe",
-			content: {
-				msgtype: "m.text",
-				body: "stable wins",
-				"m.per_message_profile": {
-					id: "stable-id",
-					displayname: "Stable Name"
-				},
-				"com.beeper.per_message_profile": {
-					id: "unstable-id",
-					displayname: "Unstable Name"
-				}
-			},
-			event_id: "$g07oYSZFWBkxohNEfywldwgcWj1hbhDzQ1sBAKvqOOU",
-			room_id: "!kLRqKKUQXcibIMtOpl:cadence.moe"
-		}),
-		{
-			ensureJoined: [],
-			messagesToDelete: [],
-			messagesToEdit: [],
-			messagesToSend: [{
-				username: "Stable Name",
-				content: "stable wins",
-				avatar_url: undefined,
-				allowed_mentions: {
-					parse: ["users", "roles"]
-				}
-			}]
-		}
-	)
-})
-
 test("event2message: data-mx-profile-fallback element is stripped from formatted_body when per-message profile is present", async t => {
 	t.deepEqual(
 		await eventToMessage({