tests: fix test_witness_replica_read fail
ref tikv/tikv#12876
@@ -452,6 +452,9 @@ fn test_witness_replica_read() {
vec![true],
);
+ // make sure the peer_on_store3 has completed applied to witness
+ std::thread::sleep(Duration::from_millis(200));
+
let mut request = new_request(
region.get_id(),
region.get_region_epoch().clone(),
