diff --git a/packages/playwright-core/src/protocol/validator.ts b/packages/playwright-core/src/protocol/validator.ts
index f4db833e02387..ca82962db1018 100644
--- a/packages/playwright-core/src/protocol/validator.ts
+++ b/packages/playwright-core/src/protocol/validator.ts
@@ -151,6 +151,7 @@ scheme.SerializedError = tObject({
     message: tString,
     name: tString,
     stack: tOptional(tString),
+    apiNameOverride: tOptional(tString),
   })),
   value: tOptional(tType('SerializedValue')),
 });
diff --git a/packages/protocol/src/protocol.yml b/packages/protocol/src/protocol.yml
index 9997989f77cef..6566a7238db8e 100644
--- a/packages/protocol/src/protocol.yml
+++ b/packages/protocol/src/protocol.yml
@@ -241,6 +241,7 @@ SerializedError:
         message: string
         name: string
         stack: string?
+        apiNameOverride: string?
     value: SerializedValue?