diff --git a/crates/call/src/room.rs b/crates/call/src/room.rs
index 6f8f8e1717..0a599e85cf 100644
--- a/crates/call/src/room.rs
+++ b/crates/call/src/room.rs
@@ -173,7 +173,11 @@ impl Room {
             cx.spawn(|this, mut cx| async move {
                 connect.await?;
 
-                if !cx.update(|cx| Self::mute_on_join(cx))? {
+                let is_read_only = this
+                    .update(&mut cx, |room, _| room.read_only())
+                    .unwrap_or(true);
+
+                if !cx.update(|cx| Self::mute_on_join(cx))? && !is_read_only {
                     this.update(&mut cx, |this, cx| this.share_microphone(cx))?
                         .await?;
                 }
diff --git a/crates/collab/src/tests/channel_guest_tests.rs b/crates/collab/src/tests/channel_guest_tests.rs
index 45e9e5a1d7..8d21db678b 100644
--- a/crates/collab/src/tests/channel_guest_tests.rs
+++ b/crates/collab/src/tests/channel_guest_tests.rs
@@ -3,7 +3,6 @@ use call::ActiveCall;
 use editor::Editor;
 use gpui::{BackgroundExecutor, TestAppContext, VisualTestContext};
 use rpc::proto;
-use workspace::Workspace;
 
 #[gpui::test]
 async fn test_channel_guests(
@@ -44,6 +43,8 @@ async fn test_channel_guests(
     let active_call_b = cx_b.read(ActiveCall::global);
     let project_b =
         active_call_b.read_with(cx_b, |call, _| call.location().unwrap().upgrade().unwrap());
+    let room_b = active_call_b.update(cx_b, |call, _| call.room().unwrap().clone());
+
     assert_eq!(
         project_b.read_with(cx_b, |project, _| project.remote_id()),
         Some(project_id),
@@ -55,7 +56,8 @@ async fn test_channel_guests(
             project.create_entry((worktree_id, "b.txt"), false, cx)
         })
         .await
-        .is_err())
+        .is_err());
+    assert!(room_b.read_with(cx_b, |room, _| !room.is_sharing_mic()));
 }
 
 #[gpui::test]
@@ -64,7 +66,6 @@ async fn test_channel_guest_promotion(cx_a: &mut TestAppContext, cx_b: &mut Test
     let client_a = server.create_client(cx_a, "user_a").await;
     let client_b = server.create_client(cx_b, "user_b").await;
     let active_call_a = cx_a.read(ActiveCall::global);
-    let active_call_b = cx_b.read(ActiveCall::global);
 
     let channel_id = server
         .make_public_channel("the-channel", &client_a, cx_a)
@@ -76,7 +77,7 @@ async fn test_channel_guest_promotion(cx_a: &mut TestAppContext, cx_b: &mut Test
         .unwrap();
 
     // Client A shares a project in the channel
-    let project_id = active_call_a
+    active_call_a
         .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
         .await
         .unwrap();
@@ -88,14 +89,29 @@ async fn test_channel_guest_promotion(cx_a: &mut TestAppContext, cx_b: &mut Test
         .unwrap();
     cx_a.run_until_parked();
 
-    let project_b =
-        active_call_b.read_with(cx_b, |call, _| call.location().unwrap().upgrade().unwrap());
-
-    // client B opens 1.txt
-    let (workspace, cx_b) = client_b.active_workspace(cx_b);
+    // client B opens 1.txt as a guest
+    let (workspace_b, cx_b) = client_b.active_workspace(cx_b);
+    let room_b = cx_b
+        .read(ActiveCall::global)
+        .update(cx_b, |call, _| call.room().unwrap().clone());
     cx_b.simulate_keystrokes("cmd-p 1 enter");
-    let editor_b = cx_b.update(|cx| workspace.read(cx).active_item_as::<Editor>(cx).unwrap());
 
+    let (project_b, editor_b) = workspace_b.update(cx_b, |workspace, cx| {
+        (
+            workspace.project().clone(),
+            workspace.active_item_as::<Editor>(cx).unwrap(),
+        )
+    });
+    assert!(project_b.read_with(cx_b, |project, _| project.is_read_only()));
+    assert!(editor_b.update(cx_b, |e, cx| e.read_only(cx)));
+    assert!(dbg!(
+        room_b
+            .update(cx_b, |room, cx| room.share_microphone(cx))
+            .await
+    )
+    .is_err());
+
+    // B is promoted
     active_call_a
         .update(cx_a, |call, cx| {
             call.room().unwrap().update(cx, |room, cx| {
@@ -108,9 +124,13 @@ async fn test_channel_guest_promotion(cx_a: &mut TestAppContext, cx_b: &mut Test
         })
         .await
         .unwrap();
-
     cx_a.run_until_parked();
 
+    // project and buffers are now editable
     assert!(project_b.read_with(cx_b, |project, _| !project.is_read_only()));
-    assert!(!editor_b.update(cx_b, |e, cx| e.read_only(cx)));
+    assert!(editor_b.update(cx_b, |editor, cx| !editor.read_only(cx)));
+    room_b
+        .update(cx_b, |room, cx| room.share_microphone(cx))
+        .await
+        .unwrap()
 }
diff --git a/crates/live_kit_client/src/test.rs b/crates/live_kit_client/src/test.rs
index 1106e66f31..07a12a4ab6 100644
--- a/crates/live_kit_client/src/test.rs
+++ b/crates/live_kit_client/src/test.rs
@@ -167,6 +167,10 @@ impl TestServer {
         let identity = claims.sub.unwrap().to_string();
         let room_name = claims.video.room.unwrap();
 
+        if claims.video.can_publish == Some(false) {
+            return Err(anyhow!("user is not allowed to publish"));
+        }
+
         let mut server_rooms = self.rooms.lock();
         let room = server_rooms
             .get_mut(&*room_name)
@@ -205,6 +209,10 @@ impl TestServer {
         let identity = claims.sub.unwrap().to_string();
         let room_name = claims.video.room.unwrap();
 
+        if claims.video.can_publish == Some(false) {
+            return Err(anyhow!("user is not allowed to publish"));
+        }
+
         let mut server_rooms = self.rooms.lock();
         let room = server_rooms
             .get_mut(&*room_name)