php-vcr not replaying cassette instead firing multiple requests

[sithara]

My tests configured with php-vcr records requests to vcr-cassette but does not replay the cassette . Instead it fires the http request over and over again

public function testInvalidOrderUpload() {
        $filename = 'my_file.pdf';
        $filepath = APPPATH.'tests/fixtures/'.$filename;
        $files = [
            'order' => [
                'name'     => $filename,
                'type'     => 'pdf',
                'tmp_name' => $filepath,
            ],
        ];

        $this->request->setFiles($files);
        \VCR\VCR::insertCassette('example');
        $output = $this->request('POST', 'orders/upload');
         $this->assertNotEmpty($output);
        \VCR\VCR::eject();
    }

and this is my Bootstrap.php

\VCR\VCR::turnOn();
\VCR\VCR::configure()->setCassettePath(APPPATH.'tests/vcr');

The external server is hit within the orders#upload action. The requests get captured correctly in the vcr cassette but instead of replaying the request the next time, it saves another new request to the cassette.

Appreciate any help