diff --git a/bunfig.toml b/bunfig.toml
index 63adf5a65..c2beb1da9 100644
--- a/bunfig.toml
+++ b/bunfig.toml
@@ -1,7 +1,4 @@
 [test]
-# Preload runs before any test module loads. setup.ts pins FORCE_COLOR=0 so Ink
-# frames are plain text (no ANSI color codes) regardless of whether stdout is a
-# TTY, keeping frame assertions deterministic across `bun test` and piped runs.
 preload = ["./src/testing/setup.ts"]
 pathIgnorePatterns = ["src/assets/**", "out/**", "dist/**"]
 coveragePathIgnorePatterns = ["src/testing/**", "src/assets/**"]
diff --git a/src/testing/setup.ts b/src/testing/setup.ts
index 3aec3b873..fccc59377 100644
--- a/src/testing/setup.ts
+++ b/src/testing/setup.ts
@@ -17,3 +17,5 @@ process.env.FORCE_COLOR = "0";
 // terminal env at import time. Pin the Windows Terminal marker so frame
 // assertions on ❯ ✗ ↵ hold on a plain conhost dev box as well.
 process.env.WT_SESSION ??= "bun-test";
+
+process.env.AGENTCORE_TELEMETRY_DISABLED = "1";