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 f3002c8c74..ace3a35dac 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
@@ -996,7 +996,7 @@ public void testEventOutputWithSpecialAndExtremeValues(final Object testValue) t
         expectedContent.put(testField, testValue);
 
         assertThat(retSources.size(), equalTo(1));
-        assertThat(retSources.containsAll(Arrays.asList(expectedContent)), equalTo(true));
+        assertThat(retSources.get(0), equalTo(expectedContent));
         sink.shutdown();
     }