With 250 pull requests of which every 25th shares a file with the branch, expect probe lines at 100, 200 and 250 with 4, 8 and 10 related pull requests and one line for merging those 10; without a branch, expect merge lines at 100 and 150 of 150. The tests fail before the previous commit.
Check that listing 150 pull requests over two pages reports their number, that fetching 250 heads in three batches reports 99, 199 and 250 of them, and that a run without pull requests still reports one fetch line. The tests fail before the previous commit.