As tested here, the URI cache for caching URI check results across all input files, does not work as expected.

There is a test for repetition in a single file: https://github.com/lycheeverse/lychee/blob/master/lychee-bin/tests/cli.rs#L218-L229
But this worked before the new URI cache was implemented. This test may be extended to use two identical files.
@mre
Is it actually intended that two identical URLs in two separate files contribute only 1 to the total of the summary, or is it still 1 per input (and only the actual request skipped internally)? In the latter case, expanding or implementing the test would be more difficult.