diff --git a/test/demo/broadway/test_broadway.py b/test/demo/broadway/test_broadway.py
index 3aebab8..20c612a 100644
--- a/test/demo/broadway/test_broadway.py
+++ b/test/demo/broadway/test_broadway.py
@@ -50,11 +50,9 @@ def main(demo, browser):
     directory = (pathlib.Path(__file__).parent / "results").resolve()
     plot = PlotlyGtk(fig)
     plot.set_size_request(800, 600)
-    webview = FigureWebView(fig)
-    webview.set_hexpand(True)
-    webview.set_vexpand(True)
+
     paned = Gtk.Paned(orientation=Gtk.Orientation.HORIZONTAL)
-    paned.set_start_child(webview)
+
     paned.set_end_child(plot)
     window.set_content(paned)
     window.maximize()
@@ -64,6 +62,10 @@ def main(demo, browser):
     def run_test():
         print("run_test")
         if browser is not None:
+            webview = FigureWebView(fig)
+            webview.set_hexpand(True)
+            webview.set_vexpand(True)
+            paned.set_start_child(webview)
             browser.get("http://127.0.0.1:8085/")
             time.sleep(5)
             print(f"Got {demo}")
@@ -77,8 +79,9 @@ def run_test():
             time.sleep(10)
         window.close()
 
-    GLib.idle_add(run_test)
-
+    thread = threading.Thresd(daemon=True, target=run_test)
+    thread.start()
+    thread.join()
 
 def run_demo(demo, browser=None):
     app = Adw.Application(application_id="io.github.slaclau.plotly_gtk.test")