diff --git a/tests/baselines/reference/getterSetterNonAccessor.types b/tests/baselines/reference/getterSetterNonAccessor.types
index f5eb22296f3..4fbff67ee49 100644
--- a/tests/baselines/reference/getterSetterNonAccessor.types
+++ b/tests/baselines/reference/getterSetterNonAccessor.types
@@ -9,9 +9,9 @@ function setFunc(v){}
 
 Object.defineProperty({}, "0", <PropertyDescriptor>({
 >Object.defineProperty({}, "0", <PropertyDescriptor>({          get: getFunc,          set: setFunc,          configurable: true      })) : any
->Object.defineProperty : (o: any, p: string, attributes: PropertyDescriptor) => any
+>Object.defineProperty : (o: any, p: string, attributes: PropertyDescriptor & ThisType<any>) => any
 >Object : ObjectConstructor
->defineProperty : (o: any, p: string, attributes: PropertyDescriptor) => any
+>defineProperty : (o: any, p: string, attributes: PropertyDescriptor & ThisType<any>) => any
 >{} : {}
 >"0" : "0"
 ><PropertyDescriptor>({          get: getFunc,          set: setFunc,          configurable: true      }) : PropertyDescriptor
diff --git a/tests/baselines/reference/objectCreate.types b/tests/baselines/reference/objectCreate.types
index b4e0e72061e..8bf433e53fe 100644
--- a/tests/baselines/reference/objectCreate.types
+++ b/tests/baselines/reference/objectCreate.types
@@ -9,17 +9,17 @@ declare var union: null | { a: number, b: string };
 var n = Object.create(null);             // object
 >n : any
 >Object.create(null) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >null : null
 
 var t = Object.create({ a: 1, b: "" });  // {a: number, b: string }
 >t : any
 >Object.create({ a: 1, b: "" }) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >{ a: 1, b: "" } : { a: number; b: string; }
 >a : number
 >1 : 1
@@ -29,43 +29,43 @@ var t = Object.create({ a: 1, b: "" });  // {a: number, b: string }
 var u = Object.create(union);            // object | {a: number, b: string }
 >u : any
 >Object.create(union) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >union : { a: number; b: string; } | null
 
 var e = Object.create({});               // {}
 >e : any
 >Object.create({}) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >{} : {}
 
 var o = Object.create(<object>{});       // object
 >o : any
 >Object.create(<object>{}) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 ><object>{} : object
 >{} : {}
 
 var a = Object.create(null, {});           // any
 >a : any
 >Object.create(null, {}) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >null : null
 >{} : {}
 
 var a = Object.create({ a: 1, b: "" }, {});
 >a : any
 >Object.create({ a: 1, b: "" }, {}) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >{ a: 1, b: "" } : { a: number; b: string; }
 >a : number
 >1 : 1
@@ -76,27 +76,27 @@ var a = Object.create({ a: 1, b: "" }, {});
 var a = Object.create(union, {});
 >a : any
 >Object.create(union, {}) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >union : { a: number; b: string; } | null
 >{} : {}
 
 var a = Object.create({}, {});
 >a : any
 >Object.create({}, {}) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >{} : {}
 >{} : {}
 
 var a = Object.create(<object>{}, {});
 >a : any
 >Object.create(<object>{}, {}) : any
->Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap): any; }
+>create : { (o: object | null): any; (o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any; }
 ><object>{} : object
 >{} : {}
 >{} : {}
diff --git a/tests/baselines/reference/objectCreate2.types b/tests/baselines/reference/objectCreate2.types
index 3e19c08bfc0..1602d70d571 100644
--- a/tests/baselines/reference/objectCreate2.types
+++ b/tests/baselines/reference/objectCreate2.types
@@ -9,17 +9,17 @@ declare var union: null | { a: number, b: string };
 var n = Object.create(null);             // any
 >n : any
 >Object.create(null) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >null : null
 
 var t = Object.create({ a: 1, b: "" });  // {a: number, b: string }
 >t : any
 >Object.create({ a: 1, b: "" }) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >{ a: 1, b: "" } : { a: number; b: string; }
 >a : number
 >1 : 1
@@ -29,43 +29,43 @@ var t = Object.create({ a: 1, b: "" });  // {a: number, b: string }
 var u = Object.create(union);            // {a: number, b: string }
 >u : any
 >Object.create(union) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >union : { a: number; b: string; }
 
 var e = Object.create({});               // {}
 >e : any
 >Object.create({}) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >{} : {}
 
 var o = Object.create(<object>{});       // object
 >o : any
 >Object.create(<object>{}) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 ><object>{} : object
 >{} : {}
 
 var a = Object.create(null, {});           // any
 >a : any
 >Object.create(null, {}) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >null : null
 >{} : {}
 
 var a = Object.create({ a: 1, b: "" }, {});
 >a : any
 >Object.create({ a: 1, b: "" }, {}) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >{ a: 1, b: "" } : { a: number; b: string; }
 >a : number
 >1 : 1
@@ -76,27 +76,27 @@ var a = Object.create({ a: 1, b: "" }, {});
 var a = Object.create(union, {});
 >a : any
 >Object.create(union, {}) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >union : { a: number; b: string; }
 >{} : {}
 
 var a = Object.create({}, {});
 >a : any
 >Object.create({}, {}) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >{} : {}
 >{} : {}
 
 var a = Object.create(<object>{}, {});
 >a : any
 >Object.create(<object>{}, {}) : any
->Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>Object.create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 >Object : ObjectConstructor
->create : { (o: object): any; (o: object, properties: PropertyDescriptorMap): any; }
+>create : { (o: object): any; (o: object, properties: PropertyDescriptorMap & ThisType<any>): any; }
 ><object>{} : object
 >{} : {}
 >{} : {}
diff --git a/tests/baselines/reference/objectLitGetterSetter.types b/tests/baselines/reference/objectLitGetterSetter.types
index 12801b65340..c2ce173e029 100644
--- a/tests/baselines/reference/objectLitGetterSetter.types
+++ b/tests/baselines/reference/objectLitGetterSetter.types
@@ -5,9 +5,9 @@
 
             Object.defineProperty(obj, "accProperty", <PropertyDescriptor>({
 >Object.defineProperty(obj, "accProperty", <PropertyDescriptor>({                get: function () {                    eval("public = 1;");                    return 11;                },                set: function (v) {                }            })) : any
->Object.defineProperty : (o: any, p: string, attributes: PropertyDescriptor) => any
+>Object.defineProperty : (o: any, p: string, attributes: PropertyDescriptor & ThisType<any>) => any
 >Object : ObjectConstructor
->defineProperty : (o: any, p: string, attributes: PropertyDescriptor) => any
+>defineProperty : (o: any, p: string, attributes: PropertyDescriptor & ThisType<any>) => any
 >obj : {}
 >"accProperty" : "accProperty"
 ><PropertyDescriptor>({                get: function () {                    eval("public = 1;");                    return 11;                },                set: function (v) {                }            }) : PropertyDescriptor