diff --git a/src/base64.ts b/src/base64.ts
index b7b8685..e8b2f27 100644
--- a/src/base64.ts
+++ b/src/base64.ts
@@ -1,3 +1,5 @@
+import { utf8Encoder } from './utf8';
+
 export const decodeBase64Url = (str: string): Uint8Array => {
   return decodeBase64(str.replace(/_|-/g, m => ({ _: '/', '-': '+' })[m] ?? m));
 };
@@ -23,3 +25,6 @@ export const decodeBase64 = (str: string): Uint8Array => {
   }
   return bytes;
 };
+
+const jsonUTF8Stringify = (obj: any): Uint8Array => utf8Encoder.encode(JSON.stringify(obj));
+export const encodeObjectBase64Url = (obj: any): string => encodeBase64Url(jsonUTF8Stringify(obj));
diff --git a/src/credential.ts b/src/credential.ts
index 0e9c24f..fbc619b 100644
--- a/src/credential.ts
+++ b/src/credential.ts
@@ -1,5 +1,4 @@
-import { encodeObjectBase64Url } from './../tests/jwk-utils';
-import { decodeBase64, encodeBase64Url } from './base64';
+import { decodeBase64, encodeBase64Url, encodeObjectBase64Url } from './base64';
 import { AppErrorCodes, FirebaseAppError } from './errors';
 import { isNonEmptyString, isNonNullObject } from './validator';
 
diff --git a/tests/jwk-utils.ts b/tests/jwk-utils.ts
index a7676cc..08046d0 100644
--- a/tests/jwk-utils.ts
+++ b/tests/jwk-utils.ts
@@ -1,4 +1,4 @@
-import { encodeBase64Url } from '../src/base64';
+import { encodeBase64Url, encodeObjectBase64Url } from '../src/base64';
 import type { KeyFetcher } from '../src/jwk-fetcher';
 import { rs256alg } from '../src/jws-verifier';
 import type { DecodedHeader, DecodedPayload, JsonWebKeyWithKid } from '../src/jwt-decoder';
@@ -28,10 +28,6 @@ export class TestingKeyFetcher implements KeyFetcher {
 export const genTime = (ms: number = Date.now()): number => Math.floor(ms / 1000);
 export const genIss = (projectId: string = 'projectId1234'): string => 'https://securetoken.google.com/' + projectId;
 
-export const encodeObjectBase64Url = (obj: any): string => encodeBase64Url(jsonUTF8Stringify(obj));
-
-const jsonUTF8Stringify = (obj: any): Uint8Array => utf8Encoder.encode(JSON.stringify(obj));
-
 export const signJWT = async (kid: string, payload: DecodedPayload, privateKey: CryptoKey) => {
   const header: DecodedHeader = {
     alg: 'RS256',