diff --git a/lib_run_single.py b/lib_run_single.py
index f66945a..fd69583 100644
--- a/lib_run_single.py
+++ b/lib_run_single.py
@@ -96,6 +96,11 @@ def run_single_example_openaicua(agent, env, example, max_steps, instruction, ar
             with open(os.path.join(example_result_dir, f"step_{step_idx + 1}_{action_timestamp}.png"),
                       "wb") as _f:
                 _f.write(obs['screenshot'])
+
+            # Remove pending checks if they exist which will cause issues with json serialization
+            if action.get('pending_checks', None):
+                del action['pending_checks']
+
             with open(os.path.join(example_result_dir, "traj.jsonl"), "a") as f:
                 f.write(json.dumps({
                     "step_num": step_idx + 1,