diff --git a/codex-rs/core/tests/suite/client.rs b/codex-rs/core/tests/suite/client.rs
index 95557c0207..6441c44133 100644
--- a/codex-rs/core/tests/suite/client.rs
+++ b/codex-rs/core/tests/suite/client.rs
@@ -219,7 +219,8 @@ $lines | Select-Object -Skip 1 | Set-Content -Path tokens.txt
         ModelProviderAuthInfo {
             command: self.command.clone(),
             args: self.args.clone(),
-            timeout_ms: non_zero_u64(/*value*/ 1_000),
+            // Match the provider-auth default; PowerShell startup in Windows CI can exceed 1s.
+            timeout_ms: non_zero_u64(/*value*/ 5_000),
             refresh_interval_ms: 60_000,
             cwd: match codex_utils_absolute_path::AbsolutePathBuf::try_from(self.tempdir.path()) {
                 Ok(cwd) => cwd,