diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7219600..78ea57f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -13,6 +13,7 @@ variables:
                 git
                 python3-gobject
                 python3-dbusmock
+                python3-psutil
                 umockdev
 
 build_stable:
diff --git a/tests/integration-test b/tests/integration-test
index b6c97ef..170df3b 100755
--- a/tests/integration-test
+++ b/tests/integration-test
@@ -23,6 +23,7 @@ import sys
 import dbus
 import tempfile
 import subprocess
+import psutil
 import unittest
 import time
 
@@ -176,6 +177,8 @@ class Tests(dbusmock.DBusTestCase):
 
         if self.daemon:
             try:
+                for child in psutil.Process(self.daemon.pid).children(recursive=True):
+                    child.kill()
                 self.daemon.kill()
             except OSError:
                 pass