diff --git a/test/test-network/systemd-networkd-tests.py b/test/test-network/systemd-networkd-tests.py
index 9a8b38a88f..877075ec5c 100755
--- a/test/test-network/systemd-networkd-tests.py
+++ b/test/test-network/systemd-networkd-tests.py
@@ -1210,7 +1210,6 @@ def tear_down_common():
     stop_dnsmasq()
     stop_isc_dhcpd()
     stop_radvd()
-    stop_modem_manager_mock()
 
     # 2. remove modules
     call_quiet('rmmod netdevsim')
@@ -10884,6 +10883,7 @@ class NetworkdWWANTests(unittest.TestCase, Utilities):
         setup_common()
 
     def tearDown(self):
+        stop_modem_manager_mock()
         tear_down_common()
 
     def test_wwan_ipv4v6_static(self):