Recently expectedFetchCount was renamed to expectedNonZeroFetch count to make the test more stable in sharded environments: https://github.com/mongodb/mongo/blob/e1abaa174bcca6810597bf75cdd1b66d21d621d0/jstests/libs/query/express_utils.js#L16

But some callers didn't rename the parameter, so this part is currently just not executed

https://github.com/mongodb/mongo/blob/e1abaa174bcca6810597bf75cdd1b66d21d621d0/jstests/core/index/express_projection.js#L63