diff --git a/tests/cases/fourslash/refactorConvertToNamedParameters20.ts b/tests/cases/fourslash/refactorConvertToNamedParameters20.ts
new file mode 100644
index 00000000000..0fb20ec864d
--- /dev/null
+++ b/tests/cases/fourslash/refactorConvertToNamedParameters20.ts
@@ -0,0 +1,17 @@
+/// <reference path='fourslash.ts' />
+
+////function foo(/*a*/a: number, b: number/*b*/) {
+////    return { bar: () => a + b };
+////}
+////var x = foo(1, 2).bar();
+
+goTo.select("a", "b");
+edit.applyRefactor({
+    refactorName: "Convert to named parameters",
+    actionName: "Convert to named parameters",
+    actionDescription: "Convert to named parameters",
+    newContent: `function foo({ a, b }: { a: number; b: number; }) {
+    return { bar: () => a + b };
+}
+var x = foo({ a: 1, b: 2 }).bar();`
+});
\ No newline at end of file
diff --git a/tests/cases/fourslash/refactorConvertToNamedParameters21.ts b/tests/cases/fourslash/refactorConvertToNamedParameters21.ts
new file mode 100644
index 00000000000..c5d15903ef5
--- /dev/null
+++ b/tests/cases/fourslash/refactorConvertToNamedParameters21.ts
@@ -0,0 +1,25 @@
+/// <reference path='fourslash.ts' />
+
+////class A { 
+////    constructor(/*a*/a: string, b: string/*b*/) { }
+////}
+////class B extends A { 
+////    constructor(a: string, b: string, c: string) {
+////        super(a, b);
+////    }
+////}
+
+goTo.select("a", "b");
+edit.applyRefactor({
+    refactorName: "Convert to named parameters",
+    actionName: "Convert to named parameters",
+    actionDescription: "Convert to named parameters",
+    newContent: `class A { 
+    constructor({ a, b }: { a: string; b: string; }) { }
+}
+class B extends A { 
+    constructor(a: string, b: string, c: string) {
+        super({ a: a, b: b });
+    }
+}`
+});
\ No newline at end of file
diff --git a/tests/cases/fourslash/refactorConvertToNamedParameters22.ts b/tests/cases/fourslash/refactorConvertToNamedParameters22.ts
new file mode 100644
index 00000000000..05a0f6f54fa
--- /dev/null
+++ b/tests/cases/fourslash/refactorConvertToNamedParameters22.ts
@@ -0,0 +1,7 @@
+/// <reference path='fourslash.ts' />
+
+////const foo: (a: number, b: number) => number = /*a*/(a: number, b: number)/*b*/ => a + b;
+////foo(1, 2);
+
+goTo.select("a", "b");
+verify.not.refactorAvailable("Convert to named parameters");