diff --git a/tests/cases/fourslash/refactorConvertToNamedParameters_inheritedConstructor.ts b/tests/cases/fourslash/refactorConvertToNamedParameters_inheritedConstructor.ts
new file mode 100644
index 00000000000..743fc7fadb4
--- /dev/null
+++ b/tests/cases/fourslash/refactorConvertToNamedParameters_inheritedConstructor.ts
@@ -0,0 +1,21 @@
+/// <reference path='fourslash.ts' />
+
+////class Foo {
+////    /*a*/constructor/*b*/(t: string, s: string) { }
+////}
+////class Bar extends Foo { }
+////var bar = new Bar("a", "b");
+////var foo = new Foo("c", "d");
+
+goTo.select("a", "b");
+edit.applyRefactor({
+    refactorName: "Convert to named parameters",
+    actionName: "Convert to named parameters",
+    actionDescription: "Convert to named parameters",
+    newContent: `class Foo {
+    constructor({ t, s }: { t: string; s: string; }) { }
+}
+class Bar extends Foo { }
+var bar = new Bar({ t: "a", s: "b" });
+var foo = new Foo({ t: "c", s: "d" })`
+});
\ No newline at end of file
diff --git a/tests/cases/fourslash/refactorConvertToNamedParameters_inheritedMethod.ts b/tests/cases/fourslash/refactorConvertToNamedParameters_inheritedMethod.ts
new file mode 100644
index 00000000000..3214ea4bf53
--- /dev/null
+++ b/tests/cases/fourslash/refactorConvertToNamedParameters_inheritedMethod.ts
@@ -0,0 +1,25 @@
+/// <reference path='fourslash.ts' />
+
+////class Foo {
+////    /*a*/bar/*b*/(t: string, s: string): string {
+////        return s + t;
+////    }
+////}
+////class Bar extends Foo { }
+////var bar = new Bar();
+////bar.bar("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 Foo {
+    bar({ t, s }: { t: string; s: string; }): string {
+        return s + t;
+    }
+}
+class Bar extends Foo { }
+var bar = new Bar();
+bar.bar({ t: "a", s: "b" });`
+});
\ No newline at end of file