diff --git a/ops/scripts/matrix_bridge_soak.py b/ops/scripts/matrix_bridge_soak.py
index ed774705..10ba73db 100644
--- a/ops/scripts/matrix_bridge_soak.py
+++ b/ops/scripts/matrix_bridge_soak.py
@@ -30,6 +30,7 @@ Exit codes:
 import argparse
 import asyncio
 import json
+import os
 import sys
 import time
 from typing import Any, Dict, List, Optional