diff --git a/.changeset/suppress-code-moved-logs.md b/.changeset/suppress-code-moved-logs.md
new file mode 100644
index 0000000000..0894fc3587
--- /dev/null
+++ b/.changeset/suppress-code-moved-logs.md
@@ -0,0 +1,7 @@
+---
+"@cloudflare/vitest-pool-workers": patch
+---
+
+Suppress `CODE_MOVED for unknown code block` log spam from workerd
+
+These are internal workerd diagnostic messages not relevant to application developers. Miniflare's structured log handler already filters them, but `vitest-pool-workers` uses a custom `handleRuntimeStdio` that bypasses that pipeline. This adds the pattern to the pool's own ignore list.
diff --git a/packages/vitest-pool-workers/src/pool/index.ts b/packages/vitest-pool-workers/src/pool/index.ts
index 7dcfbdd515..5ea78d61b6 100644
--- a/packages/vitest-pool-workers/src/pool/index.ts
+++ b/packages/vitest-pool-workers/src/pool/index.ts
@@ -80,6 +80,7 @@ const ignoreMessages = [
 	"disconnected: operation canceled",
 	"disconnected: worker_do_not_log; Request failed due to internal error",
 	"disconnected: WebSocket was aborted",
+	"CODE_MOVED for unknown code block",
 	"broken.outputGateBroken; jsg.Error: Instance dispose",
 ];
 function trimSymbolizerWarning(chunk: string): string {