diff --git a/experimental/packages/sdk-logs/test/common/LogRecord.test.ts b/experimental/packages/sdk-logs/test/common/LogRecord.test.ts
index 8954a3520a..678b4c2e72 100644
--- a/experimental/packages/sdk-logs/test/common/LogRecord.test.ts
+++ b/experimental/packages/sdk-logs/test/common/LogRecord.test.ts
@@ -207,6 +207,8 @@ describe('LogRecord', () => {
           assert.strictEqual(Object.keys(attributes).length, 100);
           assert.strictEqual(attributes.foo0, 'bar0');
           assert.deepStrictEqual(attributes.foo98, { bar: 'bar98' });
+          assert.strictEqual(attributes.foo147, undefined);
+          assert.strictEqual(attributes.foo148, undefined);
           assert.strictEqual(attributes.foo149, undefined);
         });
       });