diff --git a/__tests__/fixtures/runtimeToken.txt b/__tests__/fixtures/runtimeToken.txt
new file mode 100644
index 0000000..6319103
--- /dev/null
+++ b/__tests__/fixtures/runtimeToken.txt
@@ -0,0 +1 @@
+eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6ImVCWl9jbjNzWFlBZDBjaDRUSEJLSElnT3dPRSJ9.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.lWJuHGC7wQ9pgHXs4dMMSsflUUi6zasOzH8rz4EFvZfIlzyMcP1sZQeySNGAZ9z91JkpREzRPHFOCTp0hM9MbN6jcA05zvhSXiEE5cZikm_z32g0c5um3F3LneHwOWZeM_Lw29FBMnswuCaljvCi9p50M4wRbtqJpoYfIwvm5-nLcBbSrQZcMfPEfVXHSBCUqdoiVAunXsUrnCsKURL5T_UJIBUYBGLUrZqf2m8YnO7Wg_Q11wSz33W0gDR4_PdnOiJY1hL0vAOiRbNG0RLPA0A2QCmvlwdJOWJKOS4GgWoRr-3_PQYNy5We70CpZTpVvHtx5PQ9l65qTASNmVeg4Q
\ No newline at end of file
diff --git a/__tests__/github.test.ts b/__tests__/github.test.ts
index b8b32a0..e24ad32 100644
--- a/__tests__/github.test.ts
+++ b/__tests__/github.test.ts
@@ -1,4 +1,6 @@
 import {describe, expect, jest, it, beforeEach, afterEach} from '@jest/globals';
+import * as fs from 'fs';
+import * as path from 'path';
 
 import {GitHub, GitHubRepo} from '../src/github';
 
@@ -45,6 +47,31 @@ describe('serverURL', () => {
   });
 });
 
+describe('actionsRuntimeToken', () => {
+  const originalEnv = process.env;
+  beforeEach(() => {
+    jest.resetModules();
+    process.env = {
+      ...originalEnv
+    };
+  });
+  afterEach(() => {
+    process.env = originalEnv;
+  });
+  it('empty', async () => {
+    process.env.ACTIONS_RUNTIME_TOKEN = '';
+    const github = new GitHub();
+    expect(github.actionsRuntimeToken).toEqual({});
+  });
+  it('fixture', async () => {
+    process.env.ACTIONS_RUNTIME_TOKEN = fs.readFileSync(path.join(__dirname, 'fixtures', 'runtimeToken.txt')).toString().trim();
+    const github = new GitHub();
+    const runtimeToken = github.actionsRuntimeToken;
+    expect(runtimeToken.ac).toEqual('[{"Scope":"refs/heads/master","Permission":3}]');
+    expect(runtimeToken.iss).toEqual('vstoken.actions.githubusercontent.com');
+  });
+});
+
 describe('repoData', () => {
   it('returns GitHub repository', async () => {
     const github = new GitHub();
diff --git a/src/github.ts b/src/github.ts
index 569f683..c84857b 100644
--- a/src/github.ts
+++ b/src/github.ts
@@ -6,7 +6,7 @@ import {Context} from '@actions/github/lib/context';
 
 export type GitHubRepo = OctoOpenApiTypes['schemas']['repository'];
 
-export interface GitHubRuntimeToken extends JwtPayload {
+export interface GitHubActionsRuntimeToken extends JwtPayload {
   ac?: string;
 }
 
@@ -30,8 +30,9 @@ export class GitHub {
     return process.env.GITHUB_SERVER_URL || 'https://github.com';
   }
 
-  get runtimeToken(): GitHubRuntimeToken {
-    return jwt_decode<GitHubRuntimeToken>(`${process.env['ACTIONS_RUNTIME_TOKEN']}`);
+  get actionsRuntimeToken(): GitHubActionsRuntimeToken {
+    const token = process.env['ACTIONS_RUNTIME_TOKEN'] || '';
+    return token ? jwt_decode<GitHubActionsRuntimeToken>(token) : {};
   }
 
   public repoData(): Promise<GitHubRepo> {