3 files changed, 33 insertions, 0 deletions
diff --git a/test/js/bun/test/__snapshots__/test-test.test.ts.snap b/test/js/bun/test/__snapshots__/test-test.test.ts.snap
new file mode 100644
index 000000000..31c5d310b
--- /dev/null
+++ b/test/js/bun/test/__snapshots__/test-test.test.ts.snap
@@ -0,0 +1,3 @@
+// Bun Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`expect().toEqual() on objects with property indices doesn't print undefined 1`] = `"expect(received).toEqual(expected)\n\n  {\n+   \"0\": 0,\n+   \"1\": 1,\n+   \"10\": 10,\n+   \"11\": 11,\n+   \"12\": 12,\n+   \"13\": 13,\n+   \"14\": 14,\n+   \"15\": 15,\n+   \"2\": 2,\n+   \"3\": 3,\n+   \"4\": 4,\n+   \"5\": 5,\n+   \"6\": 6,\n+   \"7\": 7,\n+   \"8\": 8,\n+   \"9\": 9\n-   \"0\": 123,\n-   \"1\": 123,\n-   \"10\": 123,\n-   \"11\": 123,\n-   \"12\": 123,\n-   \"13\": 123,\n-   \"14\": 123,\n-   \"15\": 123,\n-   \"2\": 123,\n-   \"3\": 123,\n-   \"4\": 123,\n-   \"5\": 123,\n-   \"6\": 123,\n-   \"7\": 123,\n-   \"8\": 123,\n-   \"9\": 123\n  }\n\n- Expected  - 16\n+ Received  + 16\n\n      "`;
diff --git a/test/js/bun/test/test-fixture-diff-indexed-properties.js b/test/js/bun/test/test-fixture-diff-indexed-properties.js
new file mode 100644
index 000000000..b7a1acb23
--- /dev/null
+++ b/test/js/bun/test/test-fixture-diff-indexed-properties.js
@@ -0,0 +1,12 @@
+import { test, expect } from "bun:test";
+
+test("indexed property diff", () => {
+  var obj = {};
+  var objB = {};
+  for (let i = 0; i < 16; i++) {
+    obj[i] = i;
+    objB[i] = 123;
+  }
+
+  expect(obj).toEqual(objB);
+});
diff --git a/test/js/bun/test/test-test.test.ts b/test/js/bun/test/test-test.test.ts
index fc3e3c89e..f2c22fbcf 100644
--- a/test/js/bun/test/test-test.test.ts
+++ b/test/js/bun/test/test-test.test.ts
@@ -2775,3 +2775,21 @@ it("test timeouts when expected", () => {
   expect(err).toContain("timed out after 10ms");
   expect(err).not.toContain("unreachable code");
 });
+
+it("expect().toEqual() on objects with property indices doesn't print undefined", () => {
+  const path = join(realpathSync(tmpdir()), "test-fixture-diff-indexed-properties.test.js");
+  copyFileSync(join(import.meta.dir, "test-fixture-diff-indexed-properties.js"), path);
+  const { stdout, stderr, exited } = spawnSync({
+    cmd: [bunExe(), "test", path],
+    stdout: "pipe",
+    stderr: "pipe",
+    env: bunEnv,
+    cwd: realpathSync(dirname(path)),
+  });
+
+  let err = stderr!.toString();
+  err = err.substring(err.indexOf("expect(received).toEqual(expected)"), err.indexOf("at "));
+
+  expect(err).toMatchSnapshot();
+  expect(err).not.toContain("undefined");
+});