diff --git a/testinfra/conftest.py b/testinfra/conftest.py
index bb450b3a53..38a131e759 100644
--- a/testinfra/conftest.py
+++ b/testinfra/conftest.py
@@ -8,7 +8,7 @@ def zuul_data():
     data = {}
 
     with open('/home/zuul/src/opendev.org/opendev/system-config/inventory/base/gate-hosts.yaml') as f:
-        inventory = yaml.load(f)
+        inventory = yaml.safe_load(f)
         data['inventory'] = inventory
 
     zuul_extra_data_file = os.environ.get('TESTINFRA_EXTRA_DATA')