diff --git a/data-prepper-plugins/opensearch/src/integrationTest/java/org/opensearch/dataprepper/plugins/sink/opensearch/OpenSearchSinkIT.java b/data-prepper-plugins/opensearch/src/integrationTest/java/org/opensearch/dataprepper/plugins/sink/opensearch/OpenSearchSinkIT.java
index b17c0ea47c..8ecfddbf8d 100644
--- a/data-prepper-plugins/opensearch/src/integrationTest/java/org/opensearch/dataprepper/plugins/sink/opensearch/OpenSearchSinkIT.java
+++ b/data-prepper-plugins/opensearch/src/integrationTest/java/org/opensearch/dataprepper/plugins/sink/opensearch/OpenSearchSinkIT.java
@@ -7,6 +7,8 @@
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.JsonNodeType;
 import io.micrometer.core.instrument.Measurement;
@@ -497,12 +499,19 @@ public void testInstantiateSinkCustomIndex_WithIsmPolicy(
         assertThat(settingsIsmNode.get("rollover_alias").textValue(), equalTo(indexAlias));
 
         final String expectedIndexPolicyName = indexAlias + "-policy";
+	final String expectedPolicyIndexPattern = indexAlias + "*";
         if (isOSBundle()) {
             // Check managed index
             await().atMost(1, TimeUnit.SECONDS).untilAsserted(() -> {
                         assertThat(getIndexPolicyId(index), equalTo(expectedIndexPolicyName));
                     }
             );
+	    // Check policy index patterns are matching to indexAlias*
+	    // Refer https://github.com/opensearch-project/data-prepper/pull/5118
+            await().atMost(1, TimeUnit.SECONDS).untilAsserted(() -> {
+                        assertThat(getPolicyIndexPatterns(getIndexPolicyId(index)), equalTo(expectedPolicyIndexPattern));
+                    }
+            );
         }
 
         // roll over initial index
@@ -1745,7 +1754,18 @@ private String getIndexPolicyId(final String index) throws IOException {
                 responseBody).map().get(index)).get("index.opendistro.index_state_management.policy_id");
         return policyId;
     }
+    
+    private String getPolicyIndexPatterns(final String policyId) throws IOException {
+        // TODO: replace with new _opensearch API
+        final Request request = new Request(HttpMethod.GET, "/_opendistro/_ism/policies/" + policyId);
+        final Response response = client.performRequest(request);
+        final String responseBody = EntityUtils.toString(response.getEntity());
 
+	final ObjectMapper mapper = new ObjectMapper();
+        final JsonNode jsonNode = mapper.readTree(responseBody);
+        final JsonNode indexPatterns = (ObjectNode) jsonNode.get("policy").get("ism_template").get("index_patterns");
+        return indexPatterns.get(0).toString();
+    }
 
     @SuppressWarnings("unchecked")
     private void wipeAllOpenSearchIndices() throws IOException {