diff --git a/src/compiler/factory/nodeTests.ts b/src/compiler/factory/nodeTests.ts
index 185b4d61e381a..9de08306fa167 100644
--- a/src/compiler/factory/nodeTests.ts
+++ b/src/compiler/factory/nodeTests.ts
@@ -177,6 +177,10 @@ namespace ts {
         return node.kind === SyntaxKind.TupleType;
     }
 
+    export function isNamedTupleMember(node: Node): node is NamedTupleMember {
+        return node.kind === SyntaxKind.NamedTupleMember;
+    }
+
     export function isOptionalTypeNode(node: Node): node is OptionalTypeNode {
         return node.kind === SyntaxKind.OptionalType;
     }
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index db58c35ac46e0..fdd8af058e1ad 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -4306,6 +4306,7 @@ declare namespace ts {
     function isTypeLiteralNode(node: Node): node is TypeLiteralNode;
     function isArrayTypeNode(node: Node): node is ArrayTypeNode;
     function isTupleTypeNode(node: Node): node is TupleTypeNode;
+    function isNamedTupleMember(node: Node): node is NamedTupleMember;
     function isOptionalTypeNode(node: Node): node is OptionalTypeNode;
     function isRestTypeNode(node: Node): node is RestTypeNode;
     function isUnionTypeNode(node: Node): node is UnionTypeNode;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index a0dab441a385f..b5955e1b42245 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -4306,6 +4306,7 @@ declare namespace ts {
     function isTypeLiteralNode(node: Node): node is TypeLiteralNode;
     function isArrayTypeNode(node: Node): node is ArrayTypeNode;
     function isTupleTypeNode(node: Node): node is TupleTypeNode;
+    function isNamedTupleMember(node: Node): node is NamedTupleMember;
     function isOptionalTypeNode(node: Node): node is OptionalTypeNode;
     function isRestTypeNode(node: Node): node is RestTypeNode;
     function isUnionTypeNode(node: Node): node is UnionTypeNode;