Clickhouse tests run against different versions (2 open source, single node, open source replicated, cloud regular and fast channel), but right now there's a test filter for a subset of tests to run against the matrix of clickhouse versions:

[profile.clickhouse]default-filter ='test(test_dummy_only) | test(clickhouse) | test(db::)'

Most other e2e tests run against a pinned Clickhouse version. The filter is opaque and we should revisit how we determine which tests to run against multiple Clickhouse versions.