diff --git a/test/tests/openwrt_docker_test.py b/test/tests/openwrt_docker_test.py
index 3e10b24..466c565 100644
--- a/test/tests/openwrt_docker_test.py
+++ b/test/tests/openwrt_docker_test.py
@@ -269,7 +269,7 @@ def test_openwrt_lan(docker_services, parameter):
 
         case 'veth,nofixedip':
             # Get all IPv4 addresses 
-            process = subprocess.run(['sh','-c','ip addr show veth-openwrt0 | grep -oP "(?<=inet\s)\d+(\.\d+){3}"'], 
+            process = subprocess.run(['sh','-c',r'ip addr show veth-openwrt0 | grep -oP "(?<=inet\s)\d+(\.\d+){3}"'], 
                 stdout=subprocess.PIPE, 
                 stderr=subprocess.STDOUT,
                 universal_newlines=True)