diff --git a/tox.ini b/tox.ini
index 7109cc5c..3757153a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -45,6 +45,7 @@ whitelist_externals =
     wget
     mkdir
     rm
+    fuser
 commands =
     cp -af {toxinidir}/tests/integration/net {envtmpdir}
     bash {envtmpdir}/net/start.sh
@@ -61,6 +62,7 @@ commands =
     bash {envtmpdir}/net/stop.sh
     # no need to remove .tox/net directory.
     rm -rf /tmp/.sbws
+    fuser -k 28888/tcp
 
 [testenv:lint]
 skip_install = True