diff --git a/codex-rs/tui/src/app.rs b/codex-rs/tui/src/app.rs
index 3810b1448d..da80784fcf 100644
--- a/codex-rs/tui/src/app.rs
+++ b/codex-rs/tui/src/app.rs
@@ -6075,7 +6075,7 @@ async fn fetch_plugins_list(
         .request_typed(ClientRequest::PluginList {
             request_id,
             params: PluginListParams {
-                cwds: Some(vec![cwd]),
+                cwds: Some(vec![cwd.to_path_buf()]),
                 force_remote_sync: false,
             },
         })
diff --git a/codex-rs/tui/src/chatwidget/tests/permissions.rs b/codex-rs/tui/src/chatwidget/tests/permissions.rs
index d9ad9d9a32..930193713b 100644
--- a/codex-rs/tui/src/chatwidget/tests/permissions.rs
+++ b/codex-rs/tui/src/chatwidget/tests/permissions.rs
@@ -51,8 +51,12 @@ async fn preset_matching_accepts_workspace_write_with_extra_roots() {
         .into_iter()
         .find(|p| p.id == "auto")
         .expect("auto preset exists");
+    #[cfg(target_os = "windows")]
+    let extra_root = PathBuf::from("C:\\extra");
+    #[cfg(not(target_os = "windows"))]
+    let extra_root = PathBuf::from("/extra");
     let current_sandbox = SandboxPolicy::WorkspaceWrite {
-        writable_roots: vec![PathBuf::from("C:\\extra").abs()],
+        writable_roots: vec![extra_root.abs()],
         read_only_access: Default::default(),
         network_access: false,
         exclude_tmpdir_env_var: false,