diff --git a/packages/controller-utils/src/types.test.ts b/packages/controller-utils/src/types.test.ts
index ddac15c4999..8d1de7df7cb 100644
--- a/packages/controller-utils/src/types.test.ts
+++ b/packages/controller-utils/src/types.test.ts
@@ -2,7 +2,9 @@ import { isNetworkType, NetworkType } from './types';
 
 describe('types', () => {
   it('isNetworkType', () => {
+    // @ts-expect-error We are intentionally passing bad input.
     expect(isNetworkType({})).toBe(false);
+    // @ts-expect-error We are intentionally passing bad input.
     expect(isNetworkType(1)).toBe(false);
     expect(isNetworkType('test')).toBe(false);
     expect(isNetworkType('mainnet')).toBe(true);
diff --git a/packages/controller-utils/src/types.ts b/packages/controller-utils/src/types.ts
index 248d7623b9e..1cfad3a3e13 100644
--- a/packages/controller-utils/src/types.ts
+++ b/packages/controller-utils/src/types.ts
@@ -28,10 +28,8 @@ export type NetworkType = (typeof NetworkType)[keyof typeof NetworkType];
  * @param val - the value to check whether it is NetworkType or not.
  * @returns boolean indicating whether or not the argument is NetworkType.
  */
-// TODO: Replace `any` with type
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-export function isNetworkType(val: any): val is NetworkType {
-  return Object.values(NetworkType).includes(val);
+export function isNetworkType(val: string): val is NetworkType {
+  return Object.values(NetworkType).includes(val as NetworkType);
 }
 
 /**