diff --git a/tests/e2e/utils/measure.ts b/tests/e2e/utils/measure.ts
index a8ea98aff3e..c3fedce7627 100644
--- a/tests/e2e/utils/measure.ts
+++ b/tests/e2e/utils/measure.ts
@@ -11,7 +11,11 @@ const POLLING_STOPPED = {
 };
 let polling = POLLING_STOPPED;
 
-const start = (bundleId: string, {onAttachFailed}: {onAttachFailed: () => Promise<void>}) => {
+type StartOptions = {
+    onAttachFailed: () => Promise<void>;
+};
+
+const start = (bundleId: string, {onAttachFailed}: StartOptions) => {
     // clear our measurements results
     measures = [];
 
diff --git a/tests/e2e/utils/withFailTimeout.ts b/tests/e2e/utils/withFailTimeout.ts
index 34d041a7219..b7736e75d92 100644
--- a/tests/e2e/utils/withFailTimeout.ts
+++ b/tests/e2e/utils/withFailTimeout.ts
@@ -3,7 +3,12 @@ import CONFIG from '../config';
 // eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing -- nullish coalescing doesn't achieve the same result in this case
 const TIMEOUT = Number(process.env.INTERACTION_TIMEOUT || CONFIG.INTERACTION_TIMEOUT);
 
-const withFailTimeout = (promise: Promise<void>, name: string): {promise: Promise<unknown>; resetTimeout: () => void} => {
+type WithFailTimeoutReturn = {
+    promise: Promise<unknown>;
+    resetTimeout: () => void;
+};
+
+const withFailTimeout = (promise: Promise<void>, name: string): WithFailTimeoutReturn => {
     let timeoutId: NodeJS.Timeout;
     const resetTimeout = () => {
         clearTimeout(timeoutId);