diff --git a/server/src/test/java/org/elasticsearch/routing/PartitionedRoutingIT.java b/server/src/test/java/org/elasticsearch/routing/PartitionedRoutingIT.java
index 37ea53332af..606745bedf5 100644
--- a/server/src/test/java/org/elasticsearch/routing/PartitionedRoutingIT.java
+++ b/server/src/test/java/org/elasticsearch/routing/PartitionedRoutingIT.java
@@ -19,6 +19,7 @@
 
 package org.elasticsearch.routing;
 
+import org.apache.lucene.util.Constants;
 import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.common.settings.Settings;
@@ -58,6 +59,8 @@ public class PartitionedRoutingIT extends ESIntegTestCase {
     }
 
     public void testShrinking() throws Exception {
+        assumeFalse("http://github.com/elastic/elasticsearch/issues/33857", Constants.WINDOWS);
+
         // creates random routing groups and repeatedly halves the index until it is down to 1 shard
         // verifying that the count is correct for each shrunken index
         final int partitionSize = 3;