diff --git a/.changeset/spicy-dingos-serve.md b/.changeset/spicy-dingos-serve.md
new file mode 100644
index 0000000000..282818b49d
--- /dev/null
+++ b/.changeset/spicy-dingos-serve.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-jenkins-backend': patch
+---
+
+Add `policyDecision` method to `PermissionClient` mock in jenkinsApi test suite.
diff --git a/plugins/jenkins-backend/src/service/jenkinsApi.test.ts b/plugins/jenkins-backend/src/service/jenkinsApi.test.ts
index a5453b5ebe..e11ed32c54 100644
--- a/plugins/jenkins-backend/src/service/jenkinsApi.test.ts
+++ b/plugins/jenkins-backend/src/service/jenkinsApi.test.ts
@@ -49,6 +49,7 @@ const fakePermissionApi = {
       result: AuthorizeResult.ALLOW,
     },
   ]),
+  policyDecision: jest.fn(),
 };
 
 describe('JenkinsApi', () => {