Bug in buffers comparison #2677

describe('test buffer', () => {
  const func = (buffer) => {}
  const key = 'key'
  it.only('matches expected buffer', () => {
    const spy = sinon.spy(func)
    const buffer = Buffer.from(key, 'base64')
    spy(buffer)
    console.log('spy called with: ', spy.getCall(0).args[0])
    console.log('buffer from key: ', Buffer.from(key, 'base64'))
    assert.deepEqual(Buffer.from(key, 'base64'), spy.getCall(0).args[0])
    sinon.assert.calledOnceWithExactly(spy, Buffer.from(key, 'base64'))
  })
})

test buffer
       matches expected buffer:
     AssertError: expected func to be called once and with exact arguments 
<Buffer 91 ec>

  Binaries:
    Node: 24.13.1 - /usr/local/bin/node
    npm: 11.8.0 - /usr/local/bin/npm
  Browsers:
    Chrome: 145.0.7632.119
    Safari: 26.1