diff --git a/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/indexlifecycle/SetSingleNodeAllocateStepTests.java b/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/indexlifecycle/SetSingleNodeAllocateStepTests.java
index 525744d68af10..7b6b3668b2437 100644
--- a/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/indexlifecycle/SetSingleNodeAllocateStepTests.java
+++ b/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/indexlifecycle/SetSingleNodeAllocateStepTests.java
@@ -39,7 +39,9 @@
 import org.mockito.stubbing.Answer;
 
 import java.io.IOException;
+import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 
@@ -204,14 +206,16 @@ public void testPerformActionAttrsNoNodesValid() {
 
     public void testPerformActionAttrsRequestFails() {
         int numAttrs = randomIntBetween(1, 10);
-        String[][] validAttrs = new String[numAttrs][2];
+        Map<String, String> validAttributes = new HashMap<>();
         for (int i = 0; i < numAttrs; i++) {
-            validAttrs[i] = new String[] { randomAlphaOfLengthBetween(1, 20), randomAlphaOfLengthBetween(1, 20) };
+            validAttributes.put(randomValueOtherThanMany(validAttributes::containsKey,
+                () -> randomAlphaOfLengthBetween(1,20)), randomAlphaOfLengthBetween(1,20));
         }
         Settings.Builder indexSettings = settings(Version.CURRENT);
-        for (String[] attr : validAttrs) {
-            indexSettings.put(IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING.getKey() + attr[0], attr[1]);
-        }
+        validAttributes.forEach((k, v) -> {
+            indexSettings.put(IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING.getKey() + k, v);
+
+        });
         IndexMetaData indexMetaData = IndexMetaData.builder(randomAlphaOfLength(10)).settings(indexSettings)
                 .numberOfShards(randomIntBetween(1, 5)).numberOfReplicas(randomIntBetween(0, 5)).build();
         Index index = indexMetaData.getIndex();
@@ -223,9 +227,9 @@ public void testPerformActionAttrsRequestFails() {
             String nodeId = "node_id_" + i;
             String nodeName = "node_" + i;
             int nodePort = 9300 + i;
-            String[] nodeAttr = randomFrom(validAttrs);
+            Map.Entry<String, String> nodeAttr = randomFrom(validAttributes.entrySet());
             Settings nodeSettings = Settings.builder().put(validNodeSettings).put(Node.NODE_NAME_SETTING.getKey(), nodeName)
-                    .put(Node.NODE_ATTRIBUTES.getKey() + nodeAttr[0], nodeAttr[1]).build();
+                    .put(Node.NODE_ATTRIBUTES.getKey() + nodeAttr.getKey(), nodeAttr.getValue()).build();
             nodes.add(DiscoveryNode.createLocal(nodeSettings, new TransportAddress(TransportAddress.META_ADDRESS, nodePort), nodeId));
             validNodeIds.add(nodeId);
         }