diff --git a/x-pack/plugins/alerting/server/application/rule/methods/unmute_all/unmute_all.test.ts b/x-pack/plugins/alerting/server/application/rule/methods/unmute_all/unmute_all.test.ts
new file mode 100644
index 0000000000000..a7e8e930a5d79
--- /dev/null
+++ b/x-pack/plugins/alerting/server/application/rule/methods/unmute_all/unmute_all.test.ts
@@ -0,0 +1,75 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { RulesClientContext } from '../../../../rules_client';
+import { unmuteAll } from './unmute_all';
+import { savedObjectsRepositoryMock } from '@kbn/core-saved-objects-api-server-mocks';
+
+jest.mock('../../../../lib/retry_if_conflicts', () => ({
+  retryIfConflicts: (_: unknown, id: unknown, asyncFn: () => Promise<unknown>) => {
+    return asyncFn();
+  },
+}));
+
+jest.mock('../../../../rules_client/lib', () => ({
+  updateMetaAttributes: () => {},
+}));
+
+jest.mock('../../../../saved_objects', () => ({
+  partiallyUpdateRule: async () => {},
+}));
+
+const loggerErrorMock = jest.fn();
+const getBulkMock = jest.fn();
+
+const savedObjectsMock = savedObjectsRepositoryMock.create();
+savedObjectsMock.get = jest.fn().mockReturnValue({
+  attributes: {
+    actions: [],
+  },
+  version: '9.0.0',
+});
+
+const context = {
+  logger: { error: loggerErrorMock },
+  getActionsClient: () => {
+    return {
+      getBulk: getBulkMock,
+    };
+  },
+  unsecuredSavedObjectsClient: savedObjectsMock,
+  authorization: { ensureAuthorized: async () => {} },
+  ruleTypeRegistry: {
+    ensureRuleTypeEnabled: () => {},
+  },
+  getUserName: async () => {},
+} as unknown as RulesClientContext;
+
+describe('validate unmuteAll parameters', () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('should not throw an error for valid params', () => {
+    const validParams = {
+      id: 'ble',
+    };
+
+    expect(() => unmuteAll(context, validParams)).not.toThrow();
+    expect(savedObjectsMock.get).toHaveBeenCalled();
+  });
+
+  it('should throw Boom.badRequest for invalid params', async () => {
+    const invalidParams = {
+      id: 22 as unknown as string, // type workaround to send wrong data validation
+    };
+
+    await expect(unmuteAll(context, invalidParams)).rejects.toThrowErrorMatchingInlineSnapshot(
+      `"Error validating unmute all parameters - [id]: expected value of type [string] but got [number]"`
+    );
+  });
+});