diff --git a/core/src/test/java/org/elasticsearch/index/engine/LiveVersionMapTests.java b/core/src/test/java/org/elasticsearch/index/engine/LiveVersionMapTests.java
index ed80b98c7f9..a84f78ca3d9 100644
--- a/core/src/test/java/org/elasticsearch/index/engine/LiveVersionMapTests.java
+++ b/core/src/test/java/org/elasticsearch/index/engine/LiveVersionMapTests.java
@@ -36,8 +36,8 @@ public class LiveVersionMapTests extends ESTestCase {
         }
         long actualRamBytesUsed = RamUsageTester.sizeOf(map);
         long estimatedRamBytesUsed = map.ramBytesUsed();
-        // less than 25% off
-        assertEquals(actualRamBytesUsed, estimatedRamBytesUsed, actualRamBytesUsed / 4);
+        // less than 50% off
+        assertEquals(actualRamBytesUsed, estimatedRamBytesUsed, actualRamBytesUsed / 2);
 
         // now refresh
         map.beforeRefresh();