diff --git a/codex-rs/core/src/session/tests.rs b/codex-rs/core/src/session/tests.rs
index 7e2c5b2b78..77972fb0ad 100644
--- a/codex-rs/core/src/session/tests.rs
+++ b/codex-rs/core/src/session/tests.rs
@@ -3644,7 +3644,8 @@ async fn session_configuration_apply_permission_profile_preserves_existing_deny_
         })
         .expect("permission profile update should succeed");
 
-    let mut expected_file_system_policy = requested_file_system_policy;
+    let mut expected_file_system_policy = requested_file_system_policy
+        .materialize_project_roots_with_workspace_roots(&session_configuration.workspace_roots);
     expected_file_system_policy.glob_scan_max_depth = Some(2);
     expected_file_system_policy.entries.push(deny_entry);
     assert_eq!(