@ze97286 "A system test is required that is sending 10k transactions attached to an old block, then 10 transactions are sent on a recent block - if the first 10k transactions were not pruned, the mempool will be full and the following 10 txs will fail. The test can verify that the first 10k are rejected on checktx, and that the following 10 tx pass and that the len of uncofirmed_txs in the mempool is near zero at the end of the test".