diff --git a/tests/conf/metasrv-test.toml.template b/tests/conf/metasrv-test.toml.template
index ecd69473249a..df7f66aab73e 100644
--- a/tests/conf/metasrv-test.toml.template
+++ b/tests/conf/metasrv-test.toml.template
@@ -4,7 +4,7 @@ provider = "raft_engine"
 {{ else }}
 provider = "kafka"
 broker_endpoints = {kafka_wal_broker_endpoints | unescaped}
-num_topics = 64
+num_topics = 3
 selector_type = "round_robin"
 topic_name_prefix = "distributed_test_greptimedb_wal_topic"
 {{ endif }}