diff --git a/docs/src/api/class-selectors.md b/docs/src/api/class-selectors.md
index b64baa17ca..04c2c42a41 100644
--- a/docs/src/api/class-selectors.md
+++ b/docs/src/api/class-selectors.md
@@ -251,5 +251,6 @@ Test id attribute name.
 
 ## method: Selectors.testIdAttributeName
 * since: v1.48
+- returns: <[string]>
 
 Return the current Test id attribute name.
\ No newline at end of file
diff --git a/packages/playwright-core/types/types.d.ts b/packages/playwright-core/types/types.d.ts
index 49c97050da..0fff69e475 100644
--- a/packages/playwright-core/types/types.d.ts
+++ b/packages/playwright-core/types/types.d.ts
@@ -19899,7 +19899,7 @@ export interface Selectors {
   /**
    * Return the current Test id attribute name.
    */
-  testIdAttributeName(): void;
+  testIdAttributeName(): string;
 }
 
 /**