diff --git a/.github/actions/setup-greptimedb-cluster/with-remote-wal.yaml b/.github/actions/setup-greptimedb-cluster/with-remote-wal.yaml
index 26e354f3d0..dd230f5691 100644
--- a/.github/actions/setup-greptimedb-cluster/with-remote-wal.yaml
+++ b/.github/actions/setup-greptimedb-cluster/with-remote-wal.yaml
@@ -22,7 +22,6 @@ datanode:
     [wal]
     provider = "kafka"
     broker_endpoints = ["kafka.kafka-cluster.svc.cluster.local:9092"]
-    linger = "2ms"
     overwrite_entry_start_id = true
 frontend:
   configData: |-
diff --git a/src/common/wal/src/config.rs b/src/common/wal/src/config.rs
index 921c1faaa3..b60e1519e7 100644
--- a/src/common/wal/src/config.rs
+++ b/src/common/wal/src/config.rs
@@ -158,12 +158,7 @@ mod tests {
             provider = "kafka"
             broker_endpoints = ["127.0.0.1:9092"]
             max_batch_bytes = "1MB"
-            linger = "200ms"
             consumer_wait_timeout = "100ms"
-            backoff_init = "500ms"
-            backoff_max = "10s"
-            backoff_base = 2
-            backoff_deadline = "5mins"
             num_topics = 32
             num_partitions = 1
             selector_type = "round_robin"
diff --git a/tests/conf/datanode-test.toml.template b/tests/conf/datanode-test.toml.template
index a58d802262..f15c30cb4e 100644
--- a/tests/conf/datanode-test.toml.template
+++ b/tests/conf/datanode-test.toml.template
@@ -14,7 +14,6 @@ sync_write = false
 {{ else }}
 provider = "kafka"
 broker_endpoints = {kafka_wal_broker_endpoints | unescaped}
-linger = "5ms"
 overwrite_entry_start_id = true
 {{ endif }}
 
diff --git a/tests/conf/standalone-test.toml.template b/tests/conf/standalone-test.toml.template
index cbeb983652..901bbc6080 100644
--- a/tests/conf/standalone-test.toml.template
+++ b/tests/conf/standalone-test.toml.template
@@ -13,7 +13,6 @@ sync_write = false
 {{ else }}
 provider = "kafka"
 broker_endpoints = {kafka_wal_broker_endpoints | unescaped}
-linger = "5ms"
 {{ endif }}
 
 [storage]