diff --git a/jest.config.cjs b/jest.config.cjs
index b9a0d32..ad98e56 100644
--- a/jest.config.cjs
+++ b/jest.config.cjs
@@ -46,8 +46,9 @@ module.exports = {
       }
     ]
   },
-  transformIgnorePatterns: ['/node_modules/(?!(?:@actions/exec|@actions/github|@actions/http-client|@actions/io|@octokit|universal-user-agent|before-after-hook)/)'],
+  transformIgnorePatterns: ['/node_modules/(?!(?:@actions/core|@actions/exec|@actions/github|@actions/http-client|@actions/io|@octokit|universal-user-agent|before-after-hook)/)'],
   moduleNameMapper: {
+    '^@actions/core': '<rootDir>/node_modules/@actions/core/lib/core.js',
     '^@actions/exec$': '<rootDir>/node_modules/@actions/exec/lib/exec.js',
     '^@actions/github$': '<rootDir>/node_modules/@actions/github/lib/github.js',
     '^@actions/http-client$': '<rootDir>/node_modules/@actions/http-client/lib/index.js',
diff --git a/jest.config.itg.cjs b/jest.config.itg.cjs
index 61de7ed..4f05b2e 100644
--- a/jest.config.itg.cjs
+++ b/jest.config.itg.cjs
@@ -29,8 +29,9 @@ module.exports = {
       }
     ]
   },
-  transformIgnorePatterns: ['/node_modules/(?!(?:@actions/exec|@actions/github|@actions/http-client|@actions/io|@octokit|universal-user-agent|before-after-hook)/)'],
+  transformIgnorePatterns: ['/node_modules/(?!(?:@actions/core|@actions/exec|@actions/github|@actions/http-client|@actions/io|@octokit|universal-user-agent|before-after-hook)/)'],
   moduleNameMapper: {
+    '^@actions/core': '<rootDir>/node_modules/@actions/core/lib/core.js',
     '^@actions/exec$': '<rootDir>/node_modules/@actions/exec/lib/exec.js',
     '^@actions/github$': '<rootDir>/node_modules/@actions/github/lib/github.js',
     '^@actions/http-client$': '<rootDir>/node_modules/@actions/http-client/lib/index.js',