diff --git a/packages/assets-controllers/src/AccountTrackerController.ts b/packages/assets-controllers/src/AccountTrackerController.ts
index 5aa65496c03..6c8479dc2b7 100644
--- a/packages/assets-controllers/src/AccountTrackerController.ts
+++ b/packages/assets-controllers/src/AccountTrackerController.ts
@@ -1,9 +1,5 @@
 import type { BaseConfig, BaseState } from '@metamask/base-controller';
-import {
-  BNToHex,
-  query,
-  safelyExecuteWithTimeout,
-} from '@metamask/controller-utils';
+import { query, safelyExecuteWithTimeout } from '@metamask/controller-utils';
 import EthQuery from '@metamask/eth-query';
 import type { Provider } from '@metamask/eth-query';
 import type {
@@ -272,9 +268,12 @@ export class AccountTrackerController extends StaticIntervalPollingControllerV1<
 
       const accountsForChain = { ...accountsByChainId[chainId] };
       for (const address of accountsToUpdate) {
-        accountsForChain[address] = {
-          balance: BNToHex(await this.getBalanceFromChain(address, ethQuery)),
-        };
+        const balance = await this.getBalanceFromChain(address, ethQuery);
+        if (balance) {
+          accountsForChain[address] = {
+            balance,
+          };
+        }
       }
 
       this.update({
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);
 }
 
 /**
diff --git a/packages/controller-utils/src/util.ts b/packages/controller-utils/src/util.ts
index 2721befb3d5..d512142ce68 100644
--- a/packages/controller-utils/src/util.ts
+++ b/packages/controller-utils/src/util.ts
@@ -44,9 +44,7 @@ export function isSafeChainId(chainId: Hex): boolean {
  * @param inputBn - BN instance to convert to a hex string.
  * @returns A '0x'-prefixed hex string.
  */
-// TODO: Replace `any` with type
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-export function BNToHex(inputBn: any) {
+export function BNToHex(inputBn: BN) {
   return add0x(inputBn.toString(16));
 }
 
@@ -59,9 +57,7 @@ export function BNToHex(inputBn: any) {
  * @returns Product of the multiplication.
  */
 export function fractionBN(
-  // TODO: Replace `any` with type
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  targetBN: any,
+  targetBN: BN,
   numerator: number | string,
   denominator: number | string,
 ) {
@@ -539,25 +535,27 @@ export function isValidJson(value: unknown): value is Json {
  * @param error - Caught error that we should either rethrow or log to console
  * @param codesToCatch - array of error codes for errors we want to catch and log in a particular context
  */
-// TODO: Replace `any` with type
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-function logOrRethrowError(error: any, codesToCatch: number[] = []) {
+function logOrRethrowError(error: unknown, codesToCatch: number[] = []) {
   if (!error) {
     return;
   }
 
-  const includesErrorCodeToCatch = codesToCatch.some((code) =>
-    error.message?.includes(`Fetch failed with status '${code}'`),
-  );
+  if (error instanceof Error) {
+    const includesErrorCodeToCatch = codesToCatch.some((code) =>
+      error.message.includes(`Fetch failed with status '${code}'`),
+    );
 
-  if (
-    error instanceof Error &&
-    (includesErrorCodeToCatch ||
-      error.message?.includes('Failed to fetch') ||
-      error === TIMEOUT_ERROR)
-  ) {
-    console.error(error);
+    if (
+      includesErrorCodeToCatch ||
+      error.message.includes('Failed to fetch') ||
+      error === TIMEOUT_ERROR
+    ) {
+      console.error(error);
+    } else {
+      throw error;
+    }
   } else {
+    // eslint-disable-next-line @typescript-eslint/no-throw-literal
     throw error;
   }
 }