[BUG] Error when trying to instantiate MockedClientImpl

[nospoon]

When trying to write a test using the MockedClientImpl, when I try to pass an instance of MockedClientImpl into my mocked class under test, I get an error:
ErrorException : The behavior of unparenthesized expressions containing both '.' and '+'/'-' will change in PHP 8: '+'/'-' will take a higher precedence
The exception is being thrown on line 127 of PAGI/Client/Impl/MockedClientImpl.php, which would indicate it's trying to make a call assertion, but it is only being instantiated, no assertions were specified.

Here's my test code for reference

$agiClient = new MockedClientImpl();
$callLog = new Call();
$mockHandler = Mockery::mock(CallHandler::class, [$agiClient, $callLog])->makePartial();
$mockHandler->shouldAllowMockingProtectedMethods();