diff --git a/tests/cases/conformance/types/mapped/mappedTypes1.ts b/tests/cases/conformance/types/mapped/mappedTypes1.ts
index d090b731518..b74872c2bfd 100644
--- a/tests/cases/conformance/types/mapped/mappedTypes1.ts
+++ b/tests/cases/conformance/types/mapped/mappedTypes1.ts
@@ -34,7 +34,9 @@ type T47 = { [P in string | "a" | "b" | "0" | "1"]: void };
 declare function f1<T1>(): { [P in keyof T1]: void };
 declare function f2<T1 extends string>(): { [P in keyof T1]: void };
 declare function f3<T1 extends number>(): { [P in keyof T1]: void };
+declare function f4<T1 extends Number>(): { [P in keyof T1]: void };
 
 let x1 = f1();
 let x2 = f2();
-let x3 = f3();
\ No newline at end of file
+let x3 = f3();
+let x4 = f4();
\ No newline at end of file
diff --git a/tests/cases/conformance/types/mapped/mappedTypes2.ts b/tests/cases/conformance/types/mapped/mappedTypes2.ts
index e72a0c0a892..60db4c1383b 100644
--- a/tests/cases/conformance/types/mapped/mappedTypes2.ts
+++ b/tests/cases/conformance/types/mapped/mappedTypes2.ts
@@ -31,25 +31,30 @@ declare function pick<T, K extends keyof T>(obj: T, ...keys: K[]): Pick<T, K>;
 declare function mapObject<K extends string, T, U>(obj: Record<K, T>, f: (x: T) => U): Record<K, U>;
 declare function proxify<T>(obj: T): Proxify<T>;
 
+interface Point {
+    x: number;
+    y: number;
+}
+
 interface Shape {
     name: string;
     width: number;
     height: number;
-    visible: boolean;
+    location: Point;
 }
 
 interface PartialShape {
     name?: string;
     width?: number;
     height?: number;
-    visible?: boolean;
+    location?: Point;
 }
 
 interface ReadonlyShape {
     readonly name: string;
     readonly width: number;
     readonly height: number;
-    readonly visible: boolean;
+    readonly location: Point;
 }
 
 function f0(s1: Shape, s2: Shape) {
@@ -70,7 +75,7 @@ function f2(shape: Shape) {
 }
 
 function f3(shape: Shape) {
-    const x = pick(shape, "name", "visible");  // { name: string, visible: boolean }
+    const x = pick(shape, "name", "location");  // { name: string, location: Point }
 }
 
 function f4() {
@@ -81,11 +86,11 @@ function f4() {
 function f5(shape: Shape) {
     const p = proxify(shape);
     let name = p.name.get();
-    p.visible.set(false);
+    p.width.set(42);
 }
 
 function f6(shape: DeepReadonly<Shape>) {
-    let name = shape.name;  // DeepReadonly<string>
-    let length = name.length;  // DeepReadonly<number>
-    let toString = length.toString;  // DeepReadonly<(radix?: number) => string>
+    let name = shape.name;  // string
+    let location = shape.location;  // DeepReadonly<Point>
+    let x = location.x;  // number
 }
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