diff --git a/pulsar-io/elastic-search/src/test/java/org/apache/pulsar/io/elasticsearch/ElasticSearchTestBase.java b/pulsar-io/elastic-search/src/test/java/org/apache/pulsar/io/elasticsearch/ElasticSearchTestBase.java
index 0f5a42051c7d1..8c5868f27689b 100644
--- a/pulsar-io/elastic-search/src/test/java/org/apache/pulsar/io/elasticsearch/ElasticSearchTestBase.java
+++ b/pulsar-io/elastic-search/src/test/java/org/apache/pulsar/io/elasticsearch/ElasticSearchTestBase.java
@@ -46,7 +46,7 @@ public abstract class ElasticSearchTestBase {
             .orElse("docker.elastic.co/elasticsearch/elasticsearch:7.17.7");
 
     public static final String OPENSEARCH = Optional.ofNullable(System.getenv("OPENSEARCH_IMAGE"))
-            .orElse("opensearchproject/opensearch:1.2.4");
+            .orElse("opensearchproject/opensearch:2.16.0");
 
     protected final String elasticImageName;
 
@@ -59,6 +59,7 @@ protected ElasticsearchContainer createElasticsearchContainer() {
         if (elasticImageName.equals(OPENSEARCH)) {
             DockerImageName dockerImageName = DockerImageName.parse(OPENSEARCH).asCompatibleSubstituteFor("docker.elastic.co/elasticsearch/elasticsearch");
             elasticsearchContainer = new ElasticsearchContainer(dockerImageName)
+                    .withEnv("OPENSEARCH_INITIAL_ADMIN_PASSWORD", "0pEn7earch!")
                     .withEnv("OPENSEARCH_JAVA_OPTS", "-Xms128m -Xmx256m")
                     .withEnv("bootstrap.memory_lock", "true")
                     .withEnv("plugins.security.disabled", "true");
diff --git a/pulsar-io/elastic-search/src/test/java/org/apache/pulsar/io/elasticsearch/opensearch/OpenSearchClientSslTests.java b/pulsar-io/elastic-search/src/test/java/org/apache/pulsar/io/elasticsearch/opensearch/OpenSearchClientSslTests.java
index 72bebfe2bbf8d..0b78506491657 100644
--- a/pulsar-io/elastic-search/src/test/java/org/apache/pulsar/io/elasticsearch/opensearch/OpenSearchClientSslTests.java
+++ b/pulsar-io/elastic-search/src/test/java/org/apache/pulsar/io/elasticsearch/opensearch/OpenSearchClientSslTests.java
@@ -78,7 +78,7 @@ public void testSslBasic() throws IOException {
                     .setElasticSearchUrl("https://" + container.getHttpHostAddress())
                     .setIndexName(INDEX)
                     .setUsername("admin")
-                    .setPassword("admin")
+                    .setPassword("0pEn7earch!")
                     .setSsl(new ElasticSearchSslConfig()
                             .setEnabled(true)
                             .setTruststorePath(sslResourceDir + "/truststore.jks")
@@ -102,7 +102,7 @@ public void testSslWithHostnameVerification() throws IOException {
                     .setElasticSearchUrl("https://" + container.getHttpHostAddress())
                     .setIndexName(INDEX)
                     .setUsername("admin")
-                    .setPassword("admin")
+                    .setPassword("0pEn7earch!")
                     .setSsl(new ElasticSearchSslConfig()
                             .setEnabled(true)
                             .setProtocols("TLSv1.2")
@@ -127,7 +127,7 @@ public void testSslWithClientAuth() throws IOException {
                     .setElasticSearchUrl("https://" + container.getHttpHostAddress())
                     .setIndexName(INDEX)
                     .setUsername("admin")
-                    .setPassword("admin")
+                    .setPassword("0pEn7earch!")
                     .setSsl(new ElasticSearchSslConfig()
                             .setEnabled(true)
                             .setHostnameVerification(true)
diff --git a/tests/integration/src/test/java/org/apache/pulsar/tests/integration/io/sinks/OpenSearchSinkTester.java b/tests/integration/src/test/java/org/apache/pulsar/tests/integration/io/sinks/OpenSearchSinkTester.java
index 75f0fdac6f90c..8daed8d5c04d5 100644
--- a/tests/integration/src/test/java/org/apache/pulsar/tests/integration/io/sinks/OpenSearchSinkTester.java
+++ b/tests/integration/src/test/java/org/apache/pulsar/tests/integration/io/sinks/OpenSearchSinkTester.java
@@ -35,7 +35,7 @@
 public class OpenSearchSinkTester extends ElasticSearchSinkTester {
 
     public static final String OPENSEARCH = Optional.ofNullable(System.getenv("OPENSEARCH_IMAGE"))
-            .orElse("opensearchproject/opensearch:1.2.4");
+            .orElse("opensearchproject/opensearch:2.16.0");
 
     private RestHighLevelClient elasticClient;
 
@@ -49,6 +49,7 @@ protected ElasticsearchContainer createElasticContainer() {
         DockerImageName dockerImageName = DockerImageName.parse(OPENSEARCH)
                 .asCompatibleSubstituteFor("docker.elastic.co/elasticsearch/elasticsearch");
         return new ElasticsearchContainer(dockerImageName)
+                .withEnv("OPENSEARCH_INITIAL_ADMIN_PASSWORD", "0pEn7earch!")
                 .withEnv("OPENSEARCH_JAVA_OPTS", "-Xms128m -Xmx256m")
                 .withEnv("bootstrap.memory_lock", "true")
                 .withEnv("plugins.security.disabled", "true");