diff --git a/codex-rs/app-server/tests/common/mcp_process.rs b/codex-rs/app-server/tests/common/mcp_process.rs
index 22225c7c92..ed83417e3e 100644
--- a/codex-rs/app-server/tests/common/mcp_process.rs
+++ b/codex-rs/app-server/tests/common/mcp_process.rs
@@ -143,7 +143,7 @@ impl McpProcess {
         cmd.stderr(Stdio::piped());
         cmd.current_dir(codex_home);
         cmd.env("CODEX_HOME", codex_home);
-        cmd.env("RUST_LOG", "info");
+        cmd.env("RUST_LOG", "warn");
         // Keep integration tests isolated from host managed configuration.
         cmd.env(
             "CODEX_APP_SERVER_MANAGED_CONFIG_PATH",