diff --git a/docs/src/api/class-websocket.md b/docs/src/api/class-websocket.md
index 1441cb1a81..3b3308b885 100644
--- a/docs/src/api/class-websocket.md
+++ b/docs/src/api/class-websocket.md
@@ -16,6 +16,11 @@ Fired when the websocket closes.
 
 Fired when the websocket receives a frame.
 
+## event: WebSocket.frameReceived
+* since: v1.9
+* langs: python
+- argument: <[string]|[Buffer]> frame payload
+
 ## event: WebSocket.frameReceived
 * since: v1.9
 * langs: csharp, java
@@ -28,6 +33,11 @@ Fired when the websocket receives a frame.
 
 Fired when the websocket sends a frame.
 
+## event: WebSocket.frameSent
+* since: v1.9
+* langs: python
+- argument: <[string]|[Buffer]> frame payload
+
 ## event: WebSocket.frameSent
 * since: v1.9
 * langs: csharp, java
@@ -35,7 +45,7 @@ Fired when the websocket sends a frame.
 
 ## event: WebSocket.socketError
 * since: v1.9
-- argument: <[String]>
+- argument: <[string]>
 
 Fired when the websocket has an error.
 
diff --git a/packages/playwright-core/types/types.d.ts b/packages/playwright-core/types/types.d.ts
index 00fe441089..62a72a4ff2 100644
--- a/packages/playwright-core/types/types.d.ts
+++ b/packages/playwright-core/types/types.d.ts
@@ -18721,7 +18721,7 @@ export interface WebSocket {
   /**
    * Fired when the websocket has an error.
    */
-  on(event: 'socketerror', listener: (string: String) => void): this;
+  on(event: 'socketerror', listener: (string: string) => void): this;
 
   /**
    * Adds an event listener that will be automatically removed after it is triggered once. See `addListener` for more information about this event.
@@ -18751,7 +18751,7 @@ export interface WebSocket {
   /**
    * Adds an event listener that will be automatically removed after it is triggered once. See `addListener` for more information about this event.
    */
-  once(event: 'socketerror', listener: (string: String) => void): this;
+  once(event: 'socketerror', listener: (string: string) => void): this;
 
   /**
    * Fired when the websocket closes.
@@ -18781,7 +18781,7 @@ export interface WebSocket {
   /**
    * Fired when the websocket has an error.
    */
-  addListener(event: 'socketerror', listener: (string: String) => void): this;
+  addListener(event: 'socketerror', listener: (string: string) => void): this;
 
   /**
    * Removes an event listener added by `on` or `addListener`.
@@ -18811,7 +18811,7 @@ export interface WebSocket {
   /**
    * Removes an event listener added by `on` or `addListener`.
    */
-  removeListener(event: 'socketerror', listener: (string: String) => void): this;
+  removeListener(event: 'socketerror', listener: (string: string) => void): this;
 
   /**
    * Removes an event listener added by `on` or `addListener`.
@@ -18841,7 +18841,7 @@ export interface WebSocket {
   /**
    * Removes an event listener added by `on` or `addListener`.
    */
-  off(event: 'socketerror', listener: (string: String) => void): this;
+  off(event: 'socketerror', listener: (string: string) => void): this;
 
   /**
    * Fired when the websocket closes.
@@ -18871,7 +18871,7 @@ export interface WebSocket {
   /**
    * Fired when the websocket has an error.
    */
-  prependListener(event: 'socketerror', listener: (string: String) => void): this;
+  prependListener(event: 'socketerror', listener: (string: string) => void): this;
 
   /**
    * Indicates that the web socket has been closed.
@@ -18931,7 +18931,7 @@ export interface WebSocket {
   /**
    * Fired when the websocket has an error.
    */
-  waitForEvent(event: 'socketerror', optionsOrPredicate?: { predicate?: (string: String) => boolean | Promise<boolean>, timeout?: number } | ((string: String) => boolean | Promise<boolean>)): Promise<String>;
+  waitForEvent(event: 'socketerror', optionsOrPredicate?: { predicate?: (string: string) => boolean | Promise<boolean>, timeout?: number } | ((string: string) => boolean | Promise<boolean>)): Promise<string>;
 
 }