diff --git a/tests/test_build.py b/tests/test_build.py
index 0e0972f..442d644 100644
--- a/tests/test_build.py
+++ b/tests/test_build.py
@@ -12,6 +12,11 @@ from podctl.visitors import (
 )
 
 
+from unittest import mock
+from podctl.visitors import packages
+packages.subprocess.check_call = mock.Mock()
+
+
 def script_test(name, *visitors):
     result = str(Container(*visitors).script('build'))
     path = os.path.join(