diff --git a/server/src/test/java/org/elasticsearch/cluster/coordination/CoordinatorTests.java b/server/src/test/java/org/elasticsearch/cluster/coordination/CoordinatorTests.java
index 2a06fdb275c..2c0f52eae32 100644
--- a/server/src/test/java/org/elasticsearch/cluster/coordination/CoordinatorTests.java
+++ b/server/src/test/java/org/elasticsearch/cluster/coordination/CoordinatorTests.java
@@ -1324,7 +1324,7 @@ public class CoordinatorTests extends ESTestCase {
                             equalTo(cluster.clusterNodes.stream().map(ClusterNode::getLocalNode).collect(Collectors.toSet())));
                     }
                 });
-                cluster.runFor(warningDelayMillis, "waiting for warning to be emitted");
+                cluster.runFor(warningDelayMillis + DEFAULT_DELAY_VARIABILITY, "waiting for warning to be emitted");
                 mockLogAppender.assertAllExpectationsMatched();
             } finally {
                 mockLogAppender.stop();