diff --git a/server/src/test/java/org/elasticsearch/cluster/node/DiscoveryNodeRoleTests.java b/server/src/test/java/org/elasticsearch/cluster/node/DiscoveryNodeRoleTests.java
index d0c7a044149..d0f407958f8 100644
--- a/server/src/test/java/org/elasticsearch/cluster/node/DiscoveryNodeRoleTests.java
+++ b/server/src/test/java/org/elasticsearch/cluster/node/DiscoveryNodeRoleTests.java
@@ -50,7 +50,7 @@ public class DiscoveryNodeRoleTests extends ESTestCase {
                             }
 
                         }))));
-        assertThat(e, hasToString(containsString("Duplicate key foo ")));
+        assertThat(e, hasToString(containsString("Duplicate key")));
     }
 
     public void testDiscoveryNodeSetPossibleRolesRejectsDuplicateRoleNameAbbreviations() {
@@ -73,7 +73,7 @@ public class DiscoveryNodeRoleTests extends ESTestCase {
                             }
 
                         }))));
-        assertThat(e, hasToString(containsString("Duplicate key f ")));
+        assertThat(e, hasToString(containsString("Duplicate key")));
     }
 
 }