diff --git a/src/controllers/eventTest.ts b/src/controllers/eventTest.ts
index db6fc8cb6f..8888b63807 100644
--- a/src/controllers/eventTest.ts
+++ b/src/controllers/eventTest.ts
@@ -19,7 +19,7 @@ export default class EventTestController {
       };
       ctx.status = 400;
     }
-    ctx.set('apiVersion', this.API_VERSION);
+    ctx.set('apiVersion', EventTestController.API_VERSION);
   }
 
   public static status(ctx: Context) {
diff --git a/src/services/eventTest/eventTester.ts b/src/services/eventTest/eventTester.ts
index d4f30fff78..a3755d3e80 100644
--- a/src/services/eventTest/eventTester.ts
+++ b/src/services/eventTest/eventTester.ts
@@ -11,7 +11,7 @@ export default class EventTesterService {
     function capitalize(s) {
       return s === 'id' ? s.toUpperCase() : s.charAt(0).toUpperCase() + s.slice(1);
     }
-    let transformedObj: FixMe;
+    const transformedObj: FixMe = {};
     const { destinationDefinition } = dest;
     Object.keys(dest).forEach((key) => {
       transformedObj[capitalize(key)] = dest[key];
@@ -54,7 +54,7 @@ export default class EventTesterService {
           libraries,
         };
 
-        let response: FixMe;
+        let response: FixMe = {};
         let errorFound = false;
 
         if (stage.user_transform) {