diff --git a/src/test/resources/iroha2_config/genesis.json b/src/test/resources/iroha2_config/genesis.json
index a045cf9..38de25e 100644
--- a/src/test/resources/iroha2_config/genesis.json
+++ b/src/test/resources/iroha2_config/genesis.json
@@ -58938,7 +58938,7 @@
 }
 }
 },{
-"NewParameter": "?MaxTransactionsInBlock=512"
+"NewParameter": "?MaxTransactionsInBlock=20"
 },
 {
 "NewParameter": "?BlockTime=2000"