Failing to properly create mock for mysqli class

[alexdawn]

With Mockery 1.5.1 and phpunit 9.5.28

I am creating a mock for the inbuilt php class sqli with:
$this->sqliMock = Mockery::mock(mysqli::class);
then adding it to the SUT with dependency injection
this is working and I get a mockery object. However I am unable to then set expectations on it. Comparing this mock with another mock object for one of my own classes in xdebug I see that $this->sqliMock is lacking all the _mockery_* properties I normally see on an mock with the exception of _mockery_methods.

The only odd thing going on is that in the SUT the dependency is stored in a static property, is this what could be messing up the mock?