diff --git a/oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/test/java/org/apache/skywalking/oap/server/receiver/envoy/als/k8s/ServiceNameFormatterTest.java b/oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/test/java/org/apache/skywalking/oap/server/receiver/envoy/als/k8s/ServiceNameFormatterTest.java
index f7de0966a95bfede3ed6299a5700cbdfdc604a14..7dd198151abd2d3f2a701c1b6670f5b8117f723f 100644
--- a/oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/test/java/org/apache/skywalking/oap/server/receiver/envoy/als/k8s/ServiceNameFormatterTest.java
+++ b/oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/test/java/org/apache/skywalking/oap/server/receiver/envoy/als/k8s/ServiceNameFormatterTest.java
@@ -41,17 +41,17 @@ public class ServiceNameFormatterTest {
         return new Case[] {
             new Case(
                 null,
-                ImmutableMap.of("pod", pod(of("service.istio.io/canonical-name","Clash"))),
+                ImmutableMap.of("pod", pod(of("service.istio.io/canonical-name", "Clash"))),
                 "Clash"
             ),
             new Case(
                 null,
-                ImmutableMap.of("pod", pod(of("service.istio.io/canonical-name","ClashX", "service.istio.io/canonical-revision", "v1"))),
+                ImmutableMap.of("pod", pod(of("service.istio.io/canonical-name", "ClashX", "service.istio.io/canonical-revision", "v1"))),
                 "ClashX"
             ),
             new Case(
                 "${pod.metadata.labels.(service.istio.io/canonical-name)}-${pod.metadata.labels.(service.istio.io/canonical-revision)}",
-                ImmutableMap.of("pod", pod(of("service.istio.io/canonical-name","Clash", "service.istio.io/canonical-revision", "v1beta"))),
+                ImmutableMap.of("pod", pod(of("service.istio.io/canonical-name", "Clash", "service.istio.io/canonical-revision", "v1beta"))),
                 "Clash-v1beta"
             ),
             new Case(