[Python] How do I tell mypy that except() will bail a pytest test?

The following code works, but I fell like I shouldn't have to write it:

def test_transaction(self, the_client):
[...]
transaction: Transaction = transactions.filter([...]).first()

# NOTE: this is stupid and unnecessary just to satisfy mypy.
# the next expect() will bail if this test is true,
# so this if statement is completely superfluous
if transaction is None:
raise AssertionError("missing transaction")

# I want to tell mypy this works like the above if statement
expect(transaction).not_to(be_none())

# if the if statement above isn't there, it tells me
# None | Transaction doesn't have the property "client"
expect(transaction.client).to(equal(the_client))
[...]


Is there an easier way to do this that will satisy mypy? I have 1000+ tests like this and I don't want to add 2000+ more lines of completely unnecessary, useless code just to make a freaking code checker happy.

I have the django and drf stubs installed.

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