diff --git a/src/bun.js/bindings/ErrorCode.ts b/src/bun.js/bindings/ErrorCode.ts
index 31a3c28bac..e87e171e6e 100644
--- a/src/bun.js/bindings/ErrorCode.ts
+++ b/src/bun.js/bindings/ErrorCode.ts
@@ -20,7 +20,7 @@ const errors: ErrorCodeMapping = [
   ["ERR_ASSERTION", Error],
   ["ERR_ASYNC_CALLBACK", TypeError],
   ["ERR_ASYNC_TYPE", TypeError],
-  ["ERR_BODY_ALREADY_USED", Error],
+  ["ERR_BODY_ALREADY_USED", TypeError],
   ["ERR_BORINGSSL", Error],
   ["ERR_ZSTD", Error],
   ["ERR_BROTLI_INVALID_PARAM", RangeError],
diff --git a/test/js/web/fetch/body-mixin-errors.test.ts b/test/js/web/fetch/body-mixin-errors.test.ts
index b7568e4dc4..5fce3d4a6c 100644
--- a/test/js/web/fetch/body-mixin-errors.test.ts
+++ b/test/js/web/fetch/body-mixin-errors.test.ts
@@ -1,17 +1,24 @@
 import { describe, expect, it } from "bun:test";
 
 describe("body-mixin-errors", () => {
-  it("should fail when bodyUsed", async () => {
-    var res = new Response("a");
-    expect(res.bodyUsed).toBe(false);
-    await res.text();
-    expect(res.bodyUsed).toBe(true);
+  it.concurrent.each([
+    ["Response", () => new Response("a"), (b: Response | Request) => b.text()],
+    [
+      "Request",
+      () => new Request("https://example.com", { body: "{}", method: "POST" }),
+      (b: Response | Request) => b.json(),
+    ],
+  ])("should throw TypeError when body already used on %s", async (type, createBody, secondCall) => {
+    const body = createBody();
+    await body.text();
 
     try {
-      await res.text();
-      throw new Error("should not get here");
-    } catch (e: any) {
-      expect(e.message).toBe("Body already used");
+      await secondCall(body);
+      expect.unreachable("body is already used");
+    } catch (err: any) {
+      expect(err.name).toBe("TypeError");
+      expect(err.message).toBe("Body already used");
+      expect(err instanceof TypeError).toBe(true);
     }
   });
 });