diff --git a/flow-server/src/test/java/com/vaadin/flow/ComponentTrackerTest.java b/flow-server/src/test/java/com/vaadin/flow/ComponentTrackerTest.java
index d8cbbf5704b..b83bc1d0a97 100644
--- a/flow-server/src/test/java/com/vaadin/flow/ComponentTrackerTest.java
+++ b/flow-server/src/test/java/com/vaadin/flow/ComponentTrackerTest.java
@@ -156,10 +156,10 @@ public void memoryIsReleased() throws Exception {
     private boolean isCleared(Map<?, ?> map) throws InterruptedException {
         for (int i = 0; i < 5; i++) {
             System.gc();
-            if (map.size() == 0) {
+            if (map.isEmpty()) {
                 return true;
             }
-            Thread.sleep(1);
+            Thread.sleep(100);
         }
         return false;
     }