assertStringContainsString doesn't display the specified message

[efcor]

Hi, I was directed to this repo by @crynobone for an output issue I noticed in Laravel Dusk, and we think the issue actually lies in this repo. See laravel/dusk#1146.

Essentially, if I do $this->assertStringContainsString('foo', 'bar', 'My custom message.'); in a Dusk test (clean Laravel install and Dusk install), the "My custom message" is missing from the output. However, if I do $this->assertSame('foo', 'bar', 'My custom message.'); the "My custom message" is present in the output.

$this->assertSame('foo', 'bar', 'My custom message.');

$this->assertStringContainsString('foo', 'bar', 'My custom message.');