diff --git a/test/milquetoast/client.clj b/test/milquetoast/client.clj
index 305ce34..5340305 100644
--- a/test/milquetoast/client.clj
+++ b/test/milquetoast/client.clj
@@ -1,3 +1,8 @@
 (ns milquetoast.client
   (:require [milquetoast.client :as sut]
-            [clojure.test :as t]))
+            [clojure.test :as t]
+            [org.eclipse.paho.client.mqttv3 MqttClient]))
+
+(t/deftest test-create-mqtt-client!
+  (t/testing "create-mqtt-client! returns an instance of MqttClient"
+    (t/is (instance? MqttClient (sut/create-mqtt-client! :broker-uri "tcp://localhost:1883")))))