diff --git a/src/test/vitest/VitestTestDataPlugin.spec.ts b/src/test/vitest/VitestTestDataPlugin.spec.ts
new file mode 100644
index 0000000..05c7a95
--- /dev/null
+++ b/src/test/vitest/VitestTestDataPlugin.spec.ts
@@ -0,0 +1,146 @@
+import type { CommonMetadata, VitestTestData } from '../../vitest/types';
+import VitestTestDataPlugin from '../../vitest/VitestTestDataPlugin';
+import { getCommonMetadata, sendTestData } from '../../vitest/common';
+import type { Vitest } from 'vitest';
+import uuid from 'uuid';
+
+jest.mock('uuid', () => ({
+  v1: jest.fn(),
+}));
+
+jest.mock('../../vitest/common', () => ({
+  getCommonMetadata: jest.fn(),
+  sendTestData: jest.fn(),
+}));
+
+const mockedUuid = uuid as jest.Mocked<typeof uuid>;
+
+const mockedGetCommonMetadata = getCommonMetadata as jest.MockedFunction<
+  typeof getCommonMetadata
+>;
+const mockedSendTestData = sendTestData as jest.MockedFunction<typeof sendTestData>;
+
+const mockedVitest: Vitest = {
+  config: {
+    mode: 'test',
+    maxConcurrency: 5,
+    watch: false,
+    environment: 'jsdom',
+  } as Vitest['config'],
+  state: {
+    getFiles: () => [
+      {
+        name: 'tests/simple.test.ts',
+        collectDuration: 39,
+        setupDuration: 2354,
+        prepareDuration: 218.17033398151398,
+        environmentLoad: 2834.084042072296,
+        tasks: [
+          {
+            type: 'suite',
+            name: 'Simple Test Suite',
+            tasks: [
+              {
+                type: 'test',
+                name: 'should pass please',
+                result: {
+                  state: 'pass',
+                  startTime: 1691053322524,
+                  duration: 2,
+                },
+              },
+            ],
+          },
+        ],
+        result: {
+          state: 'pass',
+          startTime: 1691053322523,
+          duration: 2,
+        },
+      },
+    ],
+  } as unknown as Vitest['state'],
+} as Vitest;
+
+describe('VitestTestDataPlugin', () => {
+  const expected: VitestTestData = {
+    type: 'vitest',
+    vitestVersion: '0.33.0',
+    mode: 'test',
+    maxConcurrency: 5,
+    watchMode: false,
+    testEnvironment: 'jsdom',
+    runId: 'this-should-be-a-uuid-but-this-string-is-fine-for-testing',
+    files: [
+      {
+        name: 'tests/simple.test.ts',
+        collectDuration: 39,
+        setupDuration: 2354,
+        environmentLoad: 2834.084042072296,
+        prepareDuration: 218.17033398151398,
+        status: 'pass',
+        startTime: 1691053322523,
+        duration: 2,
+      },
+    ],
+    testcases: [
+      {
+        name: `Simple Test Suite > should pass please`,
+        status: 'pass',
+        startTime: 1691053322524,
+        duration: 2,
+        errorMessage: null,
+        filename: 'tests/simple.test.ts',
+      },
+    ],
+  } as unknown as VitestTestData;
+
+  beforeEach(() => {
+    jest.resetAllMocks();
+  });
+
+  it('should send the correct data', async () => {
+    // mock uuid
+    mockedUuid.v1.mockReturnValue(
+      'this-should-be-a-uuid-but-this-string-is-fine-for-testing',
+    );
+
+    // mock common utils
+    mockedGetCommonMetadata.mockReturnValue({} as CommonMetadata);
+    mockedSendTestData.mockReturnValue(Promise.resolve());
+
+    const plugin = new VitestTestDataPlugin('my custom identifier');
+    plugin.onInit(mockedVitest);
+    plugin.onFinished();
+
+    expect(mockedGetCommonMetadata).toBeCalledWith(2, 'my custom identifier');
+    expect(mockedSendTestData).toBeCalledWith(expect.objectContaining(expected));
+  });
+
+  it('should use process.env.npm_lifecycle_event as default custom identifier', async () => {
+    // mock uuid
+    mockedUuid.v1.mockReturnValue(
+      'this-should-be-a-uuid-but-this-string-is-fine-for-testing',
+    );
+
+    // mock process object
+    global.process = {
+      env: {
+        npm_lifecycle_event: 'default_value',
+      },
+    } as unknown as typeof process;
+
+    // mock common utils
+    mockedGetCommonMetadata.mockReturnValue({} as CommonMetadata);
+    mockedSendTestData.mockReturnValue(Promise.resolve());
+
+    const plugin = new VitestTestDataPlugin();
+    plugin.onInit(mockedVitest);
+    plugin.onFinished();
+
+    expect(mockedGetCommonMetadata).toBeCalledWith(2, 'default_value');
+
+    const newExpected = { ...expected, customIdentifier: 'default_value' };
+    expect(mockedSendTestData).toBeCalledWith(expect.objectContaining(expected));
+  });
+});