diff --git a/services/commtest/tests/blob_performance_test.rs b/services/commtest/tests/blob_performance_test.rs
--- a/services/commtest/tests/blob_performance_test.rs
+++ b/services/commtest/tests/blob_performance_test.rs
@@ -46,6 +46,21 @@
     // PUT
     rt.block_on(async {
       println!("performing PUT operations");
+      let mut handlers = vec![];
+      for item in &blob_data {
+        let item_cloned = item.clone();
+        let mut client_cloned = client.clone();
+        handlers.push(tokio::spawn(async move {
+          println!("--- PUT {}", item_cloned.holder);
+          let data_exists: bool =
+            put::run(&mut client_cloned, &item_cloned).await.unwrap();
+          assert!(!data_exists, "test data should not exist");
+        }));
+      }
+
+      for handler in handlers {
+        handler.await.unwrap();
+      }
     });
 
     // GET