Memoized cache errors when spying in test

[Propaganistas]

Laravel Version

12.39.0

PHP Version

8.4.15

Database Driver & Version

No response

Description

I am adding some memoization to some cache calls:

// from
Cache::remember(...)
// to
Cache::memo()->remember(...)

But tests using a cache spy start failing after this addition. The spy's expectation isn't met anymore.
Looking at the logs I can see the following server error:

Call to a member function remember() on null

Steps To Reproduce

Cache::memo()->remember(...)

In a test:

$cache = Cache::spy();

//...

$cache->shouldHaveReceived(...);