diff --git a/plugins/workload-management/src/main/java/org/opensearch/plugin/wlm/rule/structure/RuleAttributeTrie.java b/plugins/workload-management/src/main/java/org/opensearch/plugin/wlm/rule/structure/RuleAttributeTrie.java
index a471e69f85e98..9b9a5d03ba8dd 100644
--- a/plugins/workload-management/src/main/java/org/opensearch/plugin/wlm/rule/structure/RuleAttributeTrie.java
+++ b/plugins/workload-management/src/main/java/org/opensearch/plugin/wlm/rule/structure/RuleAttributeTrie.java
@@ -38,7 +38,7 @@ public void insert(String key, String value) {
     }
 
     private boolean isValidValue(String value) {
-        return ALLOWED_ATTRIBUTE_VALUES.matches(value);
+        return value.matches(ALLOWED_ATTRIBUTE_VALUES);
     }
 
     /**
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 fa8425e494b8e..4c81987143d60 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
@@ -157,11 +157,6 @@ public void testInsertAndSearchEmptyString() {
             assertEquals(Collections.singletonList("empty"), trie.search(""));
         }
 
-        @Test
-        public void testInsertEmptyValue() {
-            trie.insert("emptyvalue", "");
-            assertEquals(Collections.singletonList(""), trie.search("emptyvalue"));
-        }
 
         @Test
         public void testDeleteEmptyString() {