diff --git a/src/tests/test_app_resources.py b/src/tests/test_app_resources.py
index f53cf373e..820ad6cb7 100644
--- a/src/tests/test_app_resources.py
+++ b/src/tests/test_app_resources.py
@@ -238,7 +238,7 @@ def test_resource_ports():
 def test_resource_ports_several():
 
     r = AppResourceClassesByType["ports"]
-    conf = {"main.default": 12345, "foobar.default": 23456}
+    conf = {"main": {"default": 12345}, "foobar": {"default": 23456}}
 
     assert not app_setting("testapp", "port")
     assert not app_setting("testapp", "port_foobar")
diff --git a/src/utils/resources.py b/src/utils/resources.py
index f64ad6134..3d3d06cca 100644
--- a/src/utils/resources.py
+++ b/src/utils/resources.py
@@ -619,7 +619,7 @@ class PortsResource(AppResource):
                 continue
 
             if not port_value:
-                port_value = self.infos["default"]
+                port_value = infos["default"]
                 while self._port_is_used(port_value):
                     port_value += 1