clear logs

Author: T4rk1n

dash/testing/plugin.py

@@ -281,6 +281,7 @@ def start_server(self, app, navigate=True, **kwargs):
         """Start the local server with app."""
         # Ensure browser is on blank page before starting new server
         self._ensure_blank_page()
+        self.clear_logs()
         self.server(app, **kwargs)
         if navigate:
             self.server_url = self.server.url