diff --git a/docs/helpers/Playwright.md b/docs/helpers/Playwright.md
index 52449e075..54a28ac20 100644
--- a/docs/helpers/Playwright.md
+++ b/docs/helpers/Playwright.md
@@ -613,7 +613,7 @@ If a function returns a Promise it will wait for its resolution.
 #### Parameters
 
 -   `fn` **([string][7] | [function][9])** function to be executed in browser context.
--   `arg` **...any** to be passed to function.
+-   `arg` **...any?** to be passed to function.
 
 Returns **[Promise][10]<any>** 
 
diff --git a/lib/helper/Playwright.js b/lib/helper/Playwright.js
index 231581ef1..d2846a7eb 100644
--- a/lib/helper/Playwright.js
+++ b/lib/helper/Playwright.js
@@ -1472,10 +1472,13 @@ class Playwright extends Helper {
 
   /**
    * Executes a script on the page:
+   *
    * ```js
    * I.executeScript(() => window.alert('Hello world'));
    * ```
+   *
    * Additional parameters of the function can be passed as an object argument:
+   *
    * ```js
    * I.executeScript(({x, y}) => x + y, {x, y});
    * ```
@@ -1488,7 +1491,7 @@ class Playwright extends Helper {
    * If a function returns a Promise it will wait for its resolution.
    *
    * @param {string|function} fn function to be executed in browser context.
-   * @param {...any} arg to be passed to function.
+   * @param {...any} [arg] to be passed to function.
    * @return {Promise<any>}
    */
   async executeScript(fn, arg) {