diff --git a/plugins/workload-management/src/test/java/org/opensearch/plugin/wlm/rule/structure/FastPrefixMatchingStructureTests.java b/plugins/workload-management/src/test/java/org/opensearch/plugin/wlm/rule/structure/FastPrefixMatchingStructureTests.java
index 3a7977e26d222..fd573b8c062b8 100644
--- a/plugins/workload-management/src/test/java/org/opensearch/plugin/wlm/rule/structure/FastPrefixMatchingStructureTests.java
+++ b/plugins/workload-management/src/test/java/org/opensearch/plugin/wlm/rule/structure/FastPrefixMatchingStructureTests.java
@@ -9,6 +9,7 @@
 package org.opensearch.plugin.wlm.rule.structure;
 
 import org.opensearch.test.OpenSearchTestCase;
+
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;