diff --git a/apiserver_in_memory.js b/apiserver_in_memory.js
index 3fa1c15..fc3aacf 100644
--- a/apiserver_in_memory.js
+++ b/apiserver_in_memory.js
@@ -48,6 +48,7 @@ app.get("/counters/:counterName", (req, res) => {
         }
 
         res.status(404).send(error_response)
+        return
     }
 
     data_response = {
@@ -66,6 +67,7 @@ app.post("/counters/:counterName/increment", (req, res) => {
         }
 
         res.status(404).send(error_response)
+        return
     }
 
     data_response = {
@@ -87,6 +89,7 @@ app.post("/counters/:counterName/decrement", (req, res) => {
         }
 
         res.status(404).send(error_response)
+        return
     }
 
     data_response = {