diff --git a/tests/index/update_index.rs b/tests/index/update_index.rs
new file mode 100644
index 000000000..0078ad892
--- /dev/null
+++ b/tests/index/update_index.rs
@@ -0,0 +1,64 @@
+use crate::common::Server;
+use chrono::DateTime;
+
+#[actix_rt::test]
+async fn update_primary_key() {
+    let server = Server::new().await;
+    let index = server.index("test");
+    let (_, code) = index.create(None).await;
+
+    assert_eq!(code, 200);
+
+    let (response, code) = index.update(Some("primary")).await;
+
+    assert_eq!(code, 200);
+    assert_eq!(response["uid"], "test");
+    assert!(response.get("uuid").is_some());
+    assert!(response.get("createdAt").is_some());
+    assert!(response.get("updatedAt").is_some());
+
+    let created_at = DateTime::parse_from_rfc3339(response["createdAt"].as_str().unwrap()).unwrap();
+    let updated_at = DateTime::parse_from_rfc3339(response["updatedAt"].as_str().unwrap()).unwrap();
+    assert!(created_at < updated_at);
+
+    assert_eq!(response["primaryKey"], "primary");
+    assert_eq!(response.as_object().unwrap().len(), 5);
+}
+
+#[actix_rt::test]
+async fn update_nothing() {
+    let server = Server::new().await;
+    let index = server.index("test");
+    let (response, code) = index.create(None).await;
+
+    assert_eq!(code, 200);
+
+    let (update, code) = index.update(None).await;
+
+    assert_eq!(code, 200);
+    assert_eq!(response, update);
+}
+
+// TODO: partial test since we are testing error, amd error is not yet fully implemented in
+// transplant
+#[actix_rt::test]
+async fn update_existing_primary_key() {
+    let server = Server::new().await;
+    let index = server.index("test");
+    let (_response, code) = index.create(Some("primary")).await;
+
+    assert_eq!(code, 200);
+
+    let (_update, code) = index.update(Some("primary2")).await;
+
+    assert_eq!(code, 400);
+}
+
+// TODO: partial test since we are testing error, amd error is not yet fully implemented in
+// transplant
+#[actix_rt::test]
+async fn test_unexisting_index() {
+    let server = Server::new().await;
+    let (_response, code) = server.index("test").update(None).await;
+    assert_eq!(code, 400);
+}