diff --git a/testclient_test.go b/testclient_test.go
index 92bcf10..dbb6b1c 100644
--- a/testclient_test.go
+++ b/testclient_test.go
@@ -559,19 +559,21 @@ func (c *TestClient) checkMessageJoinedSession(message *ServerMessage, sessionId
 	return nil
 }
 
-func (c *TestClient) RunUntilJoined(ctx context.Context, hello ...*HelloServerMessage) error {
+func (c *TestClient) RunUntilJoinedAndReturnIgnored(ctx context.Context, hello ...*HelloServerMessage) ([]*ServerMessage, error) {
+	var ignored []*ServerMessage
 	for len(hello) > 0 {
 		message, err := c.RunUntilMessage(ctx)
 		if err != nil {
-			return err
+			return nil, err
 		}
 
 		if err := checkMessageType(message, "event"); err != nil {
-			return err
+			ignored = append(ignored, message)
+			continue
 		} else if message.Event.Target != "room" {
-			return fmt.Errorf("Expected event target room, got %+v", message.Event)
+			return nil, fmt.Errorf("Expected event target room, got %+v", message.Event)
 		} else if message.Event.Type != "join" {
-			return fmt.Errorf("Expected event type join, got %+v", message.Event)
+			return nil, fmt.Errorf("Expected event type join, got %+v", message.Event)
 		}
 
 		for len(message.Event.Join) > 0 {
@@ -588,10 +590,21 @@ func (c *TestClient) RunUntilJoined(ctx context.Context, hello ...*HelloServerMe
 				}
 			}
 			if !found {
-				return fmt.Errorf("expected one of the passed hello sessions, got %+v", message.Event.Join[0])
+				return nil, fmt.Errorf("expected one of the passed hello sessions, got %+v", message.Event.Join[0])
 			}
 		}
 	}
+	return ignored, nil
+}
+
+func (c *TestClient) RunUntilJoined(ctx context.Context, hello ...*HelloServerMessage) error {
+	unexpected, err := c.RunUntilJoinedAndReturnIgnored(ctx, hello...)
+	if err != nil {
+		return err
+	}
+	if len(unexpected) > 0 {
+		return fmt.Errorf("Received unexpected messages: %+v", unexpected)
+	}
 	return nil
 }