diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 6ef91a9a057..9b49636e623 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -477,6 +477,8 @@ declare namespace ts {
     type AtToken = Token<SyntaxKind.AtToken>;
     type ReadonlyToken = Token<SyntaxKind.ReadonlyKeyword>;
     type AwaitKeywordToken = Token<SyntaxKind.AwaitKeyword>;
+    type PlusToken = Token<SyntaxKind.PlusToken>;
+    type MinusToken = Token<SyntaxKind.MinusToken>;
     type Modifier = Token<SyntaxKind.AbstractKeyword> | Token<SyntaxKind.AsyncKeyword> | Token<SyntaxKind.ConstKeyword> | Token<SyntaxKind.DeclareKeyword> | Token<SyntaxKind.DefaultKeyword> | Token<SyntaxKind.ExportKeyword> | Token<SyntaxKind.PublicKeyword> | Token<SyntaxKind.PrivateKeyword> | Token<SyntaxKind.ProtectedKeyword> | Token<SyntaxKind.ReadonlyKeyword> | Token<SyntaxKind.StaticKeyword>;
     type ModifiersArray = NodeArray<Modifier>;
     interface Identifier extends PrimaryExpression, Declaration {
@@ -766,9 +768,9 @@ declare namespace ts {
     }
     interface MappedTypeNode extends TypeNode, Declaration {
         kind: SyntaxKind.MappedType;
-        readonlyToken?: ReadonlyToken;
+        readonlyToken?: ReadonlyToken | PlusToken | MinusToken;
         typeParameter: TypeParameterDeclaration;
-        questionToken?: QuestionToken;
+        questionToken?: QuestionToken | PlusToken | MinusToken;
         type?: TypeNode;
     }
     interface LiteralTypeNode extends TypeNode {
@@ -3515,8 +3517,8 @@ declare namespace ts {
     function updateTypeOperatorNode(node: TypeOperatorNode, type: TypeNode): TypeOperatorNode;
     function createIndexedAccessTypeNode(objectType: TypeNode, indexType: TypeNode): IndexedAccessTypeNode;
     function updateIndexedAccessTypeNode(node: IndexedAccessTypeNode, objectType: TypeNode, indexType: TypeNode): IndexedAccessTypeNode;
-    function createMappedTypeNode(readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode;
-    function updateMappedTypeNode(node: MappedTypeNode, readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode;
+    function createMappedTypeNode(readonlyToken: ReadonlyToken | PlusToken | MinusToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | PlusToken | MinusToken | undefined, type: TypeNode | undefined): MappedTypeNode;
+    function updateMappedTypeNode(node: MappedTypeNode, readonlyToken: ReadonlyToken | PlusToken | MinusToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | PlusToken | MinusToken | undefined, type: TypeNode | undefined): MappedTypeNode;
     function createLiteralTypeNode(literal: LiteralTypeNode["literal"]): LiteralTypeNode;
     function updateLiteralTypeNode(node: LiteralTypeNode, literal: LiteralTypeNode["literal"]): LiteralTypeNode;
     function createObjectBindingPattern(elements: ReadonlyArray<BindingElement>): ObjectBindingPattern;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index b6877639e5c..b513bb2b7bf 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -477,6 +477,8 @@ declare namespace ts {
     type AtToken = Token<SyntaxKind.AtToken>;
     type ReadonlyToken = Token<SyntaxKind.ReadonlyKeyword>;
     type AwaitKeywordToken = Token<SyntaxKind.AwaitKeyword>;
+    type PlusToken = Token<SyntaxKind.PlusToken>;
+    type MinusToken = Token<SyntaxKind.MinusToken>;
     type Modifier = Token<SyntaxKind.AbstractKeyword> | Token<SyntaxKind.AsyncKeyword> | Token<SyntaxKind.ConstKeyword> | Token<SyntaxKind.DeclareKeyword> | Token<SyntaxKind.DefaultKeyword> | Token<SyntaxKind.ExportKeyword> | Token<SyntaxKind.PublicKeyword> | Token<SyntaxKind.PrivateKeyword> | Token<SyntaxKind.ProtectedKeyword> | Token<SyntaxKind.ReadonlyKeyword> | Token<SyntaxKind.StaticKeyword>;
     type ModifiersArray = NodeArray<Modifier>;
     interface Identifier extends PrimaryExpression, Declaration {
@@ -766,9 +768,9 @@ declare namespace ts {
     }
     interface MappedTypeNode extends TypeNode, Declaration {
         kind: SyntaxKind.MappedType;
-        readonlyToken?: ReadonlyToken;
+        readonlyToken?: ReadonlyToken | PlusToken | MinusToken;
         typeParameter: TypeParameterDeclaration;
-        questionToken?: QuestionToken;
+        questionToken?: QuestionToken | PlusToken | MinusToken;
         type?: TypeNode;
     }
     interface LiteralTypeNode extends TypeNode {
@@ -3462,8 +3464,8 @@ declare namespace ts {
     function updateTypeOperatorNode(node: TypeOperatorNode, type: TypeNode): TypeOperatorNode;
     function createIndexedAccessTypeNode(objectType: TypeNode, indexType: TypeNode): IndexedAccessTypeNode;
     function updateIndexedAccessTypeNode(node: IndexedAccessTypeNode, objectType: TypeNode, indexType: TypeNode): IndexedAccessTypeNode;
-    function createMappedTypeNode(readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode;
-    function updateMappedTypeNode(node: MappedTypeNode, readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode;
+    function createMappedTypeNode(readonlyToken: ReadonlyToken | PlusToken | MinusToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | PlusToken | MinusToken | undefined, type: TypeNode | undefined): MappedTypeNode;
+    function updateMappedTypeNode(node: MappedTypeNode, readonlyToken: ReadonlyToken | PlusToken | MinusToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | PlusToken | MinusToken | undefined, type: TypeNode | undefined): MappedTypeNode;
     function createLiteralTypeNode(literal: LiteralTypeNode["literal"]): LiteralTypeNode;
     function updateLiteralTypeNode(node: LiteralTypeNode, literal: LiteralTypeNode["literal"]): LiteralTypeNode;
     function createObjectBindingPattern(elements: ReadonlyArray<BindingElement>): ObjectBindingPattern;