diff --git a/templates/app-esm/test/helper.js b/templates/app-esm/test/helper.js
index 3751f95b..85135f28 100644
--- a/templates/app-esm/test/helper.js
+++ b/templates/app-esm/test/helper.js
@@ -12,7 +12,9 @@ const AppPath = path.join(__dirname, '..', 'app.js')
 // Fill in this config with all the configurations
 // needed for testing the application
 function config () {
-  return {}
+  return {
+    skipOverride: true // Register our application with fastify-plugin
+  }
 }
 
 // automatically build and tear down our instance
diff --git a/templates/app-ts-esm/test/helper.ts b/templates/app-ts-esm/test/helper.ts
index 33201e66..d389d14c 100644
--- a/templates/app-ts-esm/test/helper.ts
+++ b/templates/app-ts-esm/test/helper.ts
@@ -14,8 +14,10 @@ const AppPath = path.join(__dirname, '..', 'src', 'app.ts')
 
 // Fill in this config with all the configurations
 // needed for testing the application
-async function config () {
-  return {}
+function config () {
+  return {
+    skipOverride: true // Register our application with fastify-plugin
+  }
 }
 
 // Automatically build and tear down our instance
@@ -26,7 +28,7 @@ async function build (t: TestContext) {
   // fastify-plugin ensures that all decorators
   // are exposed for testing purposes, this is
   // different from the production setup
-  const app = await helper.build(argv, await config())
+  const app = await helper.build(argv, config())
 
   // Tear down our app after we are done
   t.after(() => void app.close())
diff --git a/templates/app-ts/test/helper.ts b/templates/app-ts/test/helper.ts
index 2f3dc1aa..88178338 100644
--- a/templates/app-ts/test/helper.ts
+++ b/templates/app-ts/test/helper.ts
@@ -11,8 +11,10 @@ const AppPath = path.join(__dirname, '..', 'src', 'app.ts')
 
 // Fill in this config with all the configurations
 // needed for testing the application
-async function config () {
-  return {}
+function config () {
+  return {
+    skipOverride: true // Register our application with fastify-plugin
+  }
 }
 
 // Automatically build and tear down our instance
@@ -23,7 +25,7 @@ async function build (t: TestContext) {
   // fastify-plugin ensures that all decorators
   // are exposed for testing purposes, this is
   // different from the production setup
-  const app = await helper.build(argv, await config())
+  const app = await helper.build(argv, config())
 
   // Tear down our app after we are done
   t.after(() => void app.close())
diff --git a/templates/app/test/helper.js b/templates/app/test/helper.js
index a5237509..c5095f06 100644
--- a/templates/app/test/helper.js
+++ b/templates/app/test/helper.js
@@ -10,7 +10,9 @@ const AppPath = path.join(__dirname, '..', 'app.js')
 // Fill in this config with all the configurations
 // needed for testing the application
 function config () {
-  return {}
+  return {
+    skipOverride: true // Register our application with fastify-plugin
+  }
 }
 
 // automatically build and tear down our instance