diff --git a/shotover-proxy/tests/opensearch_int_tests/mod.rs b/shotover-proxy/tests/opensearch_int_tests/mod.rs
index aa30b7559..76fc28676 100644
--- a/shotover-proxy/tests/opensearch_int_tests/mod.rs
+++ b/shotover-proxy/tests/opensearch_int_tests/mod.rs
@@ -226,6 +226,17 @@ async fn opensearch_test_suite(client: &OpenSearch) {
     // test_authentication(&client).await;
 }
 
+fn create_client(addr: &str) -> OpenSearch {
+    let url = Url::parse(addr).unwrap();
+    let credentials = Credentials::Basic("admin".into(), "admin".into());
+    let transport = TransportBuilder::new(SingleNodeConnectionPool::new(url))
+        .cert_validation(CertificateValidation::None)
+        .auth(credentials)
+        .build()
+        .unwrap();
+    OpenSearch::new(transport)
+}
+
 #[tokio::test(flavor = "multi_thread")]
 async fn passthrough_standard() {
     let _compose = docker_compose("tests/test-configs/opensearch-passthrough/docker-compose.yaml");
@@ -235,17 +246,85 @@ async fn passthrough_standard() {
         .await;
 
     let addr = "http://localhost:9201";
+    let client = create_client(addr);
 
-    let url = Url::parse(addr).unwrap();
-    let credentials = Credentials::Basic("admin".into(), "admin".into());
-    let transport = TransportBuilder::new(SingleNodeConnectionPool::new(url))
-        .cert_validation(CertificateValidation::None)
-        .auth(credentials)
-        .build()
+    opensearch_test_suite(&client).await;
+
+    shotover.shutdown_and_then_consume_events(&[]).await;
+}
+
+#[tokio::test(flavor = "multi_thread")]
+async fn dual_write() {
+    let _compose = docker_compose("tests/test-configs/opensearch-dual-write/docker-compose.yaml");
+
+    let addr1 = "http://localhost:9201";
+    let client1 = create_client(addr1);
+    let addr2 = "http://localhost:9202";
+    let client2 = create_client(addr2);
+
+    opensearch_test_suite(&client1).await;
+    opensearch_test_suite(&client2).await;
+
+    let shotover = shotover_process("tests/test-configs/opensearch-dual-write/topology.yaml")
+        .start()
+        .await;
+
+    let shotover_client = create_client("http://localhost:9200");
+    opensearch_test_suite(&shotover_client).await;
+
+    shotover_client
+        .indices()
+        .create(IndicesCreateParts::Index("test-index"))
+        .send()
+        .await
         .unwrap();
-    let client = OpenSearch::new(transport);
 
-    opensearch_test_suite(&client).await;
+    let exists_response = shotover_client
+        .indices()
+        .exists(IndicesExistsParts::Index(&["test-index"]))
+        .send()
+        .await
+        .unwrap();
+
+    assert_eq!(exists_response.status_code(), StatusCode::OK);
+
+    shotover_client
+        .index(IndexParts::Index("test-index"))
+        .body(json!({
+            "name": "John",
+            "age": 30
+        }))
+        .refresh(Refresh::WaitFor)
+        .send()
+        .await
+        .unwrap();
+
+    for client in &[shotover_client, client1, client2] {
+        let response = client
+            .search(SearchParts::Index(&["test-index"]))
+            .from(0)
+            .size(10)
+            .body(json!({
+                "query": {
+                    "match": {
+                        "name": "John",
+                    }
+                }
+            }))
+            .send()
+            .await
+            .unwrap();
+
+        let results = response.json::<Value>().await.unwrap();
+        assert!(results["took"].as_i64().is_some());
+        assert_eq!(
+            results["hits"].as_object().unwrap()["hits"]
+                .as_array()
+                .unwrap()
+                .len(),
+            1
+        );
+    }
 
     shotover.shutdown_and_then_consume_events(&[]).await;
 }
diff --git a/shotover-proxy/tests/test-configs/opensearch-dual-write/docker-compose.yaml b/shotover-proxy/tests/test-configs/opensearch-dual-write/docker-compose.yaml
new file mode 100644
index 000000000..766327442
--- /dev/null
+++ b/shotover-proxy/tests/test-configs/opensearch-dual-write/docker-compose.yaml
@@ -0,0 +1,50 @@
+version: '3'
+services:
+  opensearch-node1:
+    image: opensearchproject/opensearch:2.9.0
+    container_name: opensearch-node1
+    environment:
+      - cluster.name=opensearch-cluster-1
+      - node.name=opensearch-node1
+      - bootstrap.memory_lock=true
+      - "OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m"
+      - discovery.type=single-node
+      - plugins.security.disabled=true
+    ulimits:
+      memlock:
+        soft: -1
+        hard: -1
+      nofile:
+        soft: 65536
+        hard: 65536
+    volumes:
+      - type: volume
+        target: /usr/share/opensearch/data
+    ports:
+      - 9201:9200
+      - 9601:9600
+
+  opensearch-node2:
+    image: opensearchproject/opensearch:2.9.0
+    container_name: opensearch-node2
+    environment:
+      - cluster.name=opensearch-cluster-2
+      - node.name=opensearch-node2
+      - bootstrap.memory_lock=true
+      - "OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m"
+      - discovery.type=single-node
+      - plugins.security.disabled=true
+    ulimits:
+      memlock:
+        soft: -1
+        hard: -1
+      nofile:
+        soft: 65536
+        hard: 65536
+    volumes:
+      - type: volume
+        target: /usr/share/opensearch/data
+    ports:
+      - 9202:9200
+      - 9602:9600
+
diff --git a/shotover-proxy/tests/test-configs/opensearch-dual-write/topology.yaml b/shotover-proxy/tests/test-configs/opensearch-dual-write/topology.yaml
new file mode 100644
index 000000000..119e6673f
--- /dev/null
+++ b/shotover-proxy/tests/test-configs/opensearch-dual-write/topology.yaml
@@ -0,0 +1,19 @@
+---
+sources:
+  opensearch_prod:
+    OpenSearch:
+      listen_addr: "127.0.0.1:9200"
+chain_config:
+  main_chain:
+    - Tee:
+        behavior: Ignore
+        buffer_size: 10000
+        chain:
+          - OpenSearchSink:
+              remote_address: "127.0.0.1:9202"
+              connect_timeout_ms: 3000
+    - OpenSearchSink:
+        remote_address: "127.0.0.1:9201"
+        connect_timeout_ms: 3000
+source_to_chain_mapping:
+  opensearch_prod: main_chain