diff --git a/tests/unit/resolution_resolvelib/test_provider.py b/tests/unit/resolution_resolvelib/test_provider.py
index 09b887f09b9..5b0d8d4df84 100644
--- a/tests/unit/resolution_resolvelib/test_provider.py
+++ b/tests/unit/resolution_resolvelib/test_provider.py
@@ -46,6 +46,7 @@ def test_provider_known_depths(factory: Factory) -> None:
         resolutions={},
         candidates={},
         information={root_requirement_name: root_requirement_information},
+        backtrack_causes=[],
     )
     assert provider._known_depths == {root_requirement_name: 1.0}
 
@@ -69,6 +70,7 @@ def test_provider_known_depths(factory: Factory) -> None:
             root_requirement_name: root_requirement_information,
             transative_requirement_name: transative_package_information,
         },
+        backtrack_causes=[],
     )
     assert provider._known_depths == {
         transative_requirement_name: 2.0,