diff --git a/test/jdk/java/lang/runtime/ReferencedKeyTest.java b/test/jdk/java/lang/runtime/ReferencedKeyTest.java
index 9234cffb98a..d29af212edb 100644
--- a/test/jdk/java/lang/runtime/ReferencedKeyTest.java
+++ b/test/jdk/java/lang/runtime/ReferencedKeyTest.java
@@ -87,6 +87,10 @@ static void methods(Map<Long, String> map) {
     }
 
     static void collect() {
+        System.gc();
+        System.gc();
+        sleep();
+        System.gc();
         System.gc();
         sleep();
     }