diff --git a/plugins/scaffolder-backend/src/scaffolder/actions/builtin/publish/log.test.ts b/plugins/scaffolder-backend/src/scaffolder/actions/builtin/publish/log.test.ts
new file mode 100644
index 0000000000..f554f480e5
--- /dev/null
+++ b/plugins/scaffolder-backend/src/scaffolder/actions/builtin/publish/log.test.ts
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2021 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { getVoidLogger } from '@backstage/backend-common';
+import mock from 'mock-fs';
+import os from 'os';
+import { Writable } from 'stream';
+import { createPublishLogAction } from './log';
+
+describe('publish:log', () => {
+  const logStream = ({
+    write: jest.fn(),
+  } as jest.Mocked<Partial<Writable>>) as jest.Mocked<Writable>;
+
+  const mockTmpDir = os.tmpdir();
+  const mockContext = {
+    input: {},
+    baseUrl: 'somebase',
+    workspacePath: mockTmpDir,
+    logger: getVoidLogger(),
+    logStream,
+    output: jest.fn(),
+    createTemporaryDirectory: jest.fn().mockResolvedValue(mockTmpDir),
+  };
+
+  const action = createPublishLogAction();
+
+  beforeEach(() => {
+    mock({
+      [`${mockContext.workspacePath}/README.md`]: '',
+      [`${mockContext.workspacePath}/a-directory/index.md`]: '',
+    });
+    jest.resetAllMocks();
+  });
+
+  afterEach(() => {
+    mock.restore();
+  });
+
+  it('should do nothing', async () => {
+    await action.handler(mockContext);
+
+    expect(logStream.write).toBeCalledTimes(0);
+  });
+
+  it('should log the workspace content, if active', async () => {
+    const context = {
+      ...mockContext,
+      input: {
+        listWorkspace: 'true',
+      },
+    };
+
+    await action.handler(context);
+
+    expect(logStream.write).toBeCalledTimes(1);
+    expect(logStream.write).toBeCalledWith(
+      expect.stringContaining('./README.md'),
+    );
+    expect(logStream.write).toBeCalledWith(
+      expect.stringContaining('a-directory/index.md'),
+    );
+  });
+
+  it('should log message', async () => {
+    const context = {
+      ...mockContext,
+      input: {
+        message: 'Hello Backstage!',
+      },
+    };
+
+    await action.handler(context);
+
+    expect(logStream.write).toBeCalledTimes(1);
+    expect(logStream.write).toBeCalledWith(
+      expect.stringContaining('Hello Backstage!'),
+    );
+  });
+});