diff --git a/codex-rs/login/src/auth/auth_tests.rs b/codex-rs/login/src/auth/auth_tests.rs
index 53580c72d3..5299c7af70 100644
--- a/codex-rs/login/src/auth/auth_tests.rs
+++ b/codex-rs/login/src/auth/auth_tests.rs
@@ -364,7 +364,7 @@ mv tokens.next tokens.txt
             let script_path = tempdir.path().join("print-token.ps1");
             std::fs::write(
                 &script_path,
-                r#"$lines = Get-Content -Path tokens.txt
+                r#"$lines = @(Get-Content -Path tokens.txt)
 if ($lines.Count -eq 0) { exit 1 }
 Write-Output $lines[0]
 $lines | Select-Object -Skip 1 | Set-Content -Path tokens.txt