diff --git a/docs/src/test-api/class-test.md b/docs/src/test-api/class-test.md
index 617437e810..5b4ea02026 100644
--- a/docs/src/test-api/class-test.md
+++ b/docs/src/test-api/class-test.md
@@ -255,6 +255,8 @@ declaration.
 
 Learn more about the execution modes [here](./test-parallel-js.md).
 
+Running tests in parallel:
+
 ```js js-flavor=js
 // Run all the tests in the file concurrently using parallel workers.
 test.describe.configure({ mode: 'parallel' });
@@ -269,6 +271,8 @@ test('runs in parallel 1', async ({ page }) => {});
 test('runs in parallel 2', async ({ page }) => {});
 ```
 
+Running tests sequentially:
+
 ```js js-flavor=js
 // Annotate tests as inter-dependent.
 test.describe.configure({ mode: 'serial' });
diff --git a/packages/playwright-test/types/test.d.ts b/packages/playwright-test/types/test.d.ts
index 5160660224..ab218514e6 100644
--- a/packages/playwright-test/types/test.d.ts
+++ b/packages/playwright-test/types/test.d.ts
@@ -1719,6 +1719,8 @@ export interface TestType<TestArgs extends KeyValue, WorkerArgs extends KeyValue
    *
    * Learn more about the execution modes [here](https://playwright.dev/docs/test-parallel-js).
    *
+   * Running tests in parallel:
+   *
    * ```ts
    * // Run all the tests in the file concurrently using parallel workers.
    * test.describe.configure({ mode: 'parallel' });
@@ -1726,6 +1728,8 @@ export interface TestType<TestArgs extends KeyValue, WorkerArgs extends KeyValue
    * test('runs in parallel 2', async ({ page }) => {});
    * ```
    *
+   * Running tests sequentially:
+   *
    * ```ts
    * // Annotate tests as inter-dependent.
    * test.describe.configure({ mode: 'serial' });