diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter01.js b/tests/baselines/reference/emptyArrayBindingPatternParameter01.js
index 5723c74f117..1eb76741e84 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter01.js
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter01.js
@@ -1,6 +1,5 @@
 //// [emptyArrayBindingPatternParameter01.ts]
 
-
 function f([]) {
     var x, y, z;
 }
@@ -9,3 +8,7 @@ function f([]) {
 function f(_a) {
     var x, y, z;
 }
+
+
+//// [emptyArrayBindingPatternParameter01.d.ts]
+declare function f([]: any[]): void;
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter01.symbols b/tests/baselines/reference/emptyArrayBindingPatternParameter01.symbols
index f5089ce5850..e1630be639b 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter01.symbols
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter01.symbols
@@ -1,11 +1,10 @@
 === tests/cases/conformance/es6/destructuring/emptyArrayBindingPatternParameter01.ts ===
 
-
 function f([]) {
 >f : Symbol(f, Decl(emptyArrayBindingPatternParameter01.ts, 0, 0))
 
     var x, y, z;
->x : Symbol(x, Decl(emptyArrayBindingPatternParameter01.ts, 3, 7))
->y : Symbol(y, Decl(emptyArrayBindingPatternParameter01.ts, 3, 10))
->z : Symbol(z, Decl(emptyArrayBindingPatternParameter01.ts, 3, 13))
+>x : Symbol(x, Decl(emptyArrayBindingPatternParameter01.ts, 2, 7))
+>y : Symbol(y, Decl(emptyArrayBindingPatternParameter01.ts, 2, 10))
+>z : Symbol(z, Decl(emptyArrayBindingPatternParameter01.ts, 2, 13))
 }
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter01.types b/tests/baselines/reference/emptyArrayBindingPatternParameter01.types
index 7ef40d52d59..4ca0b892ecf 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter01.types
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter01.types
@@ -1,6 +1,5 @@
 === tests/cases/conformance/es6/destructuring/emptyArrayBindingPatternParameter01.ts ===
 
-
 function f([]) {
 >f : ([]: any[]) => void
 
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter02.js b/tests/baselines/reference/emptyArrayBindingPatternParameter02.js
index dbd86e843a8..d6dda16e12f 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter02.js
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter02.js
@@ -1,6 +1,5 @@
 //// [emptyArrayBindingPatternParameter02.ts]
 
-
 function f(a, []) {
     var x, y, z;
 }
@@ -9,3 +8,7 @@ function f(a, []) {
 function f(a, _a) {
     var x, y, z;
 }
+
+
+//// [emptyArrayBindingPatternParameter02.d.ts]
+declare function f(a: any, []: any[]): void;
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter02.symbols b/tests/baselines/reference/emptyArrayBindingPatternParameter02.symbols
index 48cdcfaf93d..3289c06f962 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter02.symbols
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter02.symbols
@@ -1,12 +1,11 @@
 === tests/cases/conformance/es6/destructuring/emptyArrayBindingPatternParameter02.ts ===
 
-
 function f(a, []) {
 >f : Symbol(f, Decl(emptyArrayBindingPatternParameter02.ts, 0, 0))
->a : Symbol(a, Decl(emptyArrayBindingPatternParameter02.ts, 2, 11))
+>a : Symbol(a, Decl(emptyArrayBindingPatternParameter02.ts, 1, 11))
 
     var x, y, z;
->x : Symbol(x, Decl(emptyArrayBindingPatternParameter02.ts, 3, 7))
->y : Symbol(y, Decl(emptyArrayBindingPatternParameter02.ts, 3, 10))
->z : Symbol(z, Decl(emptyArrayBindingPatternParameter02.ts, 3, 13))
+>x : Symbol(x, Decl(emptyArrayBindingPatternParameter02.ts, 2, 7))
+>y : Symbol(y, Decl(emptyArrayBindingPatternParameter02.ts, 2, 10))
+>z : Symbol(z, Decl(emptyArrayBindingPatternParameter02.ts, 2, 13))
 }
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter02.types b/tests/baselines/reference/emptyArrayBindingPatternParameter02.types
index a58fe6b91d3..34d9e7dde6b 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter02.types
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter02.types
@@ -1,6 +1,5 @@
 === tests/cases/conformance/es6/destructuring/emptyArrayBindingPatternParameter02.ts ===
 
-
 function f(a, []) {
 >f : (a: any, []: any[]) => void
 >a : any
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter03.js b/tests/baselines/reference/emptyArrayBindingPatternParameter03.js
index e2c3f7196e6..4867b39ac2f 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter03.js
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter03.js
@@ -1,6 +1,5 @@
 //// [emptyArrayBindingPatternParameter03.ts]
 
-
 function f(a, []) {
     var x, y, z;
 }
@@ -9,3 +8,7 @@ function f(a, []) {
 function f(a, _a) {
     var x, y, z;
 }
+
+
+//// [emptyArrayBindingPatternParameter03.d.ts]
+declare function f(a: any, []: any[]): void;
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter03.symbols b/tests/baselines/reference/emptyArrayBindingPatternParameter03.symbols
index d3ec078df78..86a95687310 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter03.symbols
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter03.symbols
@@ -1,12 +1,11 @@
 === tests/cases/conformance/es6/destructuring/emptyArrayBindingPatternParameter03.ts ===
 
-
 function f(a, []) {
 >f : Symbol(f, Decl(emptyArrayBindingPatternParameter03.ts, 0, 0))
->a : Symbol(a, Decl(emptyArrayBindingPatternParameter03.ts, 2, 11))
+>a : Symbol(a, Decl(emptyArrayBindingPatternParameter03.ts, 1, 11))
 
     var x, y, z;
->x : Symbol(x, Decl(emptyArrayBindingPatternParameter03.ts, 3, 7))
->y : Symbol(y, Decl(emptyArrayBindingPatternParameter03.ts, 3, 10))
->z : Symbol(z, Decl(emptyArrayBindingPatternParameter03.ts, 3, 13))
+>x : Symbol(x, Decl(emptyArrayBindingPatternParameter03.ts, 2, 7))
+>y : Symbol(y, Decl(emptyArrayBindingPatternParameter03.ts, 2, 10))
+>z : Symbol(z, Decl(emptyArrayBindingPatternParameter03.ts, 2, 13))
 }
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter03.types b/tests/baselines/reference/emptyArrayBindingPatternParameter03.types
index 43f0af63ace..1c5579ebe36 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter03.types
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter03.types
@@ -1,6 +1,5 @@
 === tests/cases/conformance/es6/destructuring/emptyArrayBindingPatternParameter03.ts ===
 
-
 function f(a, []) {
 >f : (a: any, []: any[]) => void
 >a : any
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter04.js b/tests/baselines/reference/emptyArrayBindingPatternParameter04.js
index e0715499ffe..c9819c88f40 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter04.js
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter04.js
@@ -1,6 +1,5 @@
 //// [emptyArrayBindingPatternParameter04.ts]
 
-
 function f([] = [1,2,3,4]) {
     var x, y, z;
 }
@@ -10,3 +9,7 @@ function f(_a) {
     var _a = [1, 2, 3, 4];
     var x, y, z;
 }
+
+
+//// [emptyArrayBindingPatternParameter04.d.ts]
+declare function f([]?: number[]): void;
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter04.symbols b/tests/baselines/reference/emptyArrayBindingPatternParameter04.symbols
index bb76a2c5925..9f4c9bae0c6 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter04.symbols
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter04.symbols
@@ -1,11 +1,10 @@
 === tests/cases/conformance/es6/destructuring/emptyArrayBindingPatternParameter04.ts ===
 
-
 function f([] = [1,2,3,4]) {
 >f : Symbol(f, Decl(emptyArrayBindingPatternParameter04.ts, 0, 0))
 
     var x, y, z;
->x : Symbol(x, Decl(emptyArrayBindingPatternParameter04.ts, 3, 7))
->y : Symbol(y, Decl(emptyArrayBindingPatternParameter04.ts, 3, 10))
->z : Symbol(z, Decl(emptyArrayBindingPatternParameter04.ts, 3, 13))
+>x : Symbol(x, Decl(emptyArrayBindingPatternParameter04.ts, 2, 7))
+>y : Symbol(y, Decl(emptyArrayBindingPatternParameter04.ts, 2, 10))
+>z : Symbol(z, Decl(emptyArrayBindingPatternParameter04.ts, 2, 13))
 }
diff --git a/tests/baselines/reference/emptyArrayBindingPatternParameter04.types b/tests/baselines/reference/emptyArrayBindingPatternParameter04.types
index 6f00a994f7b..834eb41b34d 100644
--- a/tests/baselines/reference/emptyArrayBindingPatternParameter04.types
+++ b/tests/baselines/reference/emptyArrayBindingPatternParameter04.types
@@ -1,6 +1,5 @@
 === tests/cases/conformance/es6/destructuring/emptyArrayBindingPatternParameter04.ts ===
 
-
 function f([] = [1,2,3,4]) {
 >f : ([]?: number[]) => void
 >[1,2,3,4] : number[]
diff --git a/tests/baselines/reference/emptyAssignmentPatterns01_ES5.js b/tests/baselines/reference/emptyAssignmentPatterns01_ES5.js
index b89db88e5e5..fe0a642c51e 100644
--- a/tests/baselines/reference/emptyAssignmentPatterns01_ES5.js
+++ b/tests/baselines/reference/emptyAssignmentPatterns01_ES5.js
@@ -9,3 +9,7 @@ var a: any;
 var a;
 (a);
 (a);
+
+
+//// [emptyAssignmentPatterns01_ES5.d.ts]
+declare var a: any;
diff --git a/tests/baselines/reference/emptyAssignmentPatterns01_ES6.js b/tests/baselines/reference/emptyAssignmentPatterns01_ES6.js
index fe311ac9061..4cf33452d98 100644
--- a/tests/baselines/reference/emptyAssignmentPatterns01_ES6.js
+++ b/tests/baselines/reference/emptyAssignmentPatterns01_ES6.js
@@ -9,3 +9,7 @@ var a: any;
 var a;
 ({} = a);
 ([] = a);
+
+
+//// [emptyAssignmentPatterns01_ES6.d.ts]
+declare var a: any;
diff --git a/tests/baselines/reference/emptyAssignmentPatterns02_ES5.js b/tests/baselines/reference/emptyAssignmentPatterns02_ES5.js
index 7b9f1f402f9..27a0b5f9b61 100644
--- a/tests/baselines/reference/emptyAssignmentPatterns02_ES5.js
+++ b/tests/baselines/reference/emptyAssignmentPatterns02_ES5.js
@@ -11,3 +11,8 @@ var a;
 var x, y, z, a1, a2, a3;
 ((x = a.x, y = a.y, z = a.z, a));
 ((a1 = a[0], a2 = a[1], a3 = a[2], a));
+
+
+//// [emptyAssignmentPatterns02_ES5.d.ts]
+declare var a: any;
+declare let x: any, y: any, z: any, a1: any, a2: any, a3: any;
diff --git a/tests/baselines/reference/emptyAssignmentPatterns02_ES6.js b/tests/baselines/reference/emptyAssignmentPatterns02_ES6.js
index e9783c7e57d..493246c9473 100644
--- a/tests/baselines/reference/emptyAssignmentPatterns02_ES6.js
+++ b/tests/baselines/reference/emptyAssignmentPatterns02_ES6.js
@@ -11,3 +11,8 @@ var a;
 let x, y, z, a1, a2, a3;
 ({} = { x, y, z } = a);
 ([] = [a1, a2, a3] = a);
+
+
+//// [emptyAssignmentPatterns02_ES6.d.ts]
+declare var a: any;
+declare let x: any, y: any, z: any, a1: any, a2: any, a3: any;
diff --git a/tests/baselines/reference/emptyAssignmentPatterns03_ES5.js b/tests/baselines/reference/emptyAssignmentPatterns03_ES5.js
index d9ff8ba9ede..adaad2e3b63 100644
--- a/tests/baselines/reference/emptyAssignmentPatterns03_ES5.js
+++ b/tests/baselines/reference/emptyAssignmentPatterns03_ES5.js
@@ -9,3 +9,7 @@ var a: any;
 var a;
 (a);
 (a);
+
+
+//// [emptyAssignmentPatterns03_ES5.d.ts]
+declare var a: any;
diff --git a/tests/baselines/reference/emptyAssignmentPatterns03_ES6.js b/tests/baselines/reference/emptyAssignmentPatterns03_ES6.js
index 95bfdfefa52..8050cc1e47a 100644
--- a/tests/baselines/reference/emptyAssignmentPatterns03_ES6.js
+++ b/tests/baselines/reference/emptyAssignmentPatterns03_ES6.js
@@ -9,3 +9,7 @@ var a: any;
 var a;
 ({} = {} = a);
 ([] = [] = a);
+
+
+//// [emptyAssignmentPatterns03_ES6.d.ts]
+declare var a: any;
diff --git a/tests/baselines/reference/emptyAssignmentPatterns04_ES5.js b/tests/baselines/reference/emptyAssignmentPatterns04_ES5.js
index 7e342d08e39..e6b3cc7e3f2 100644
--- a/tests/baselines/reference/emptyAssignmentPatterns04_ES5.js
+++ b/tests/baselines/reference/emptyAssignmentPatterns04_ES5.js
@@ -12,3 +12,8 @@ var x, y, z, a1, a2, a3;
 (_a = a, x = _a.x, y = _a.y, z = _a.z, _a);
 (_b = a, a1 = _b[0], a2 = _b[1], a3 = _b[2], _b);
 var _a, _b;
+
+
+//// [emptyAssignmentPatterns04_ES5.d.ts]
+declare var a: any;
+declare let x: any, y: any, z: any, a1: any, a2: any, a3: any;
diff --git a/tests/baselines/reference/emptyAssignmentPatterns04_ES6.js b/tests/baselines/reference/emptyAssignmentPatterns04_ES6.js
index eabc2678c05..fb52975d6d1 100644
--- a/tests/baselines/reference/emptyAssignmentPatterns04_ES6.js
+++ b/tests/baselines/reference/emptyAssignmentPatterns04_ES6.js
@@ -11,3 +11,8 @@ var a;
 let x, y, z, a1, a2, a3;
 ({ x, y, z } = {} = a);
 ([a1, a2, a3] = [] = a);
+
+
+//// [emptyAssignmentPatterns04_ES6.d.ts]
+declare var a: any;
+declare let x: any, y: any, z: any, a1: any, a2: any, a3: any;
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter01.js b/tests/baselines/reference/emptyObjectBindingPatternParameter01.js
index 28cc30d2a0b..6a8ec808cd0 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter01.js
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter01.js
@@ -1,6 +1,5 @@
 //// [emptyObjectBindingPatternParameter01.ts]
 
-
 function f({}) {
     var x, y, z;
 }
@@ -9,3 +8,7 @@ function f({}) {
 function f(_a) {
     var x, y, z;
 }
+
+
+//// [emptyObjectBindingPatternParameter01.d.ts]
+declare function f({}: {}): void;
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter01.symbols b/tests/baselines/reference/emptyObjectBindingPatternParameter01.symbols
index 98829df994f..3ef5898c29a 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter01.symbols
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter01.symbols
@@ -1,11 +1,10 @@
 === tests/cases/conformance/es6/destructuring/emptyObjectBindingPatternParameter01.ts ===
 
-
 function f({}) {
 >f : Symbol(f, Decl(emptyObjectBindingPatternParameter01.ts, 0, 0))
 
     var x, y, z;
->x : Symbol(x, Decl(emptyObjectBindingPatternParameter01.ts, 3, 7))
->y : Symbol(y, Decl(emptyObjectBindingPatternParameter01.ts, 3, 10))
->z : Symbol(z, Decl(emptyObjectBindingPatternParameter01.ts, 3, 13))
+>x : Symbol(x, Decl(emptyObjectBindingPatternParameter01.ts, 2, 7))
+>y : Symbol(y, Decl(emptyObjectBindingPatternParameter01.ts, 2, 10))
+>z : Symbol(z, Decl(emptyObjectBindingPatternParameter01.ts, 2, 13))
 }
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter01.types b/tests/baselines/reference/emptyObjectBindingPatternParameter01.types
index c46569ea770..05ddc54719c 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter01.types
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter01.types
@@ -1,6 +1,5 @@
 === tests/cases/conformance/es6/destructuring/emptyObjectBindingPatternParameter01.ts ===
 
-
 function f({}) {
 >f : ({}: {}) => void
 
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter02.js b/tests/baselines/reference/emptyObjectBindingPatternParameter02.js
index 8488428ea51..be2bdcab298 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter02.js
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter02.js
@@ -1,6 +1,5 @@
 //// [emptyObjectBindingPatternParameter02.ts]
 
-
 function f(a, {}) {
     var x, y, z;
 }
@@ -9,3 +8,7 @@ function f(a, {}) {
 function f(a, _a) {
     var x, y, z;
 }
+
+
+//// [emptyObjectBindingPatternParameter02.d.ts]
+declare function f(a: any, {}: {}): void;
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter02.symbols b/tests/baselines/reference/emptyObjectBindingPatternParameter02.symbols
index fb0fa946b6f..d5bb4f292aa 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter02.symbols
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter02.symbols
@@ -1,12 +1,11 @@
 === tests/cases/conformance/es6/destructuring/emptyObjectBindingPatternParameter02.ts ===
 
-
 function f(a, {}) {
 >f : Symbol(f, Decl(emptyObjectBindingPatternParameter02.ts, 0, 0))
->a : Symbol(a, Decl(emptyObjectBindingPatternParameter02.ts, 2, 11))
+>a : Symbol(a, Decl(emptyObjectBindingPatternParameter02.ts, 1, 11))
 
     var x, y, z;
->x : Symbol(x, Decl(emptyObjectBindingPatternParameter02.ts, 3, 7))
->y : Symbol(y, Decl(emptyObjectBindingPatternParameter02.ts, 3, 10))
->z : Symbol(z, Decl(emptyObjectBindingPatternParameter02.ts, 3, 13))
+>x : Symbol(x, Decl(emptyObjectBindingPatternParameter02.ts, 2, 7))
+>y : Symbol(y, Decl(emptyObjectBindingPatternParameter02.ts, 2, 10))
+>z : Symbol(z, Decl(emptyObjectBindingPatternParameter02.ts, 2, 13))
 }
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter02.types b/tests/baselines/reference/emptyObjectBindingPatternParameter02.types
index 0a77fac8588..e2b485538e6 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter02.types
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter02.types
@@ -1,6 +1,5 @@
 === tests/cases/conformance/es6/destructuring/emptyObjectBindingPatternParameter02.ts ===
 
-
 function f(a, {}) {
 >f : (a: any, {}: {}) => void
 >a : any
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter03.js b/tests/baselines/reference/emptyObjectBindingPatternParameter03.js
index 0279744e386..320bfe2d0df 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter03.js
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter03.js
@@ -1,6 +1,5 @@
 //// [emptyObjectBindingPatternParameter03.ts]
 
-
 function f({}, a) {
     var x, y, z;
 }
@@ -9,3 +8,7 @@ function f({}, a) {
 function f(_a, a) {
     var x, y, z;
 }
+
+
+//// [emptyObjectBindingPatternParameter03.d.ts]
+declare function f({}: {}, a: any): void;
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter03.symbols b/tests/baselines/reference/emptyObjectBindingPatternParameter03.symbols
index 4e658e21ccf..82a1bcee75b 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter03.symbols
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter03.symbols
@@ -1,12 +1,11 @@
 === tests/cases/conformance/es6/destructuring/emptyObjectBindingPatternParameter03.ts ===
 
-
 function f({}, a) {
 >f : Symbol(f, Decl(emptyObjectBindingPatternParameter03.ts, 0, 0))
->a : Symbol(a, Decl(emptyObjectBindingPatternParameter03.ts, 2, 14))
+>a : Symbol(a, Decl(emptyObjectBindingPatternParameter03.ts, 1, 14))
 
     var x, y, z;
->x : Symbol(x, Decl(emptyObjectBindingPatternParameter03.ts, 3, 7))
->y : Symbol(y, Decl(emptyObjectBindingPatternParameter03.ts, 3, 10))
->z : Symbol(z, Decl(emptyObjectBindingPatternParameter03.ts, 3, 13))
+>x : Symbol(x, Decl(emptyObjectBindingPatternParameter03.ts, 2, 7))
+>y : Symbol(y, Decl(emptyObjectBindingPatternParameter03.ts, 2, 10))
+>z : Symbol(z, Decl(emptyObjectBindingPatternParameter03.ts, 2, 13))
 }
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter03.types b/tests/baselines/reference/emptyObjectBindingPatternParameter03.types
index 873c748dd9b..0f89702402a 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter03.types
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter03.types
@@ -1,6 +1,5 @@
 === tests/cases/conformance/es6/destructuring/emptyObjectBindingPatternParameter03.ts ===
 
-
 function f({}, a) {
 >f : ({}: {}, a: any) => void
 >a : any
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter04.js b/tests/baselines/reference/emptyObjectBindingPatternParameter04.js
index fc3e41d0709..8c128bb806e 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter04.js
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter04.js
@@ -1,6 +1,5 @@
 //// [emptyObjectBindingPatternParameter04.ts]
 
-
 function f({} = {a: 1, b: "2", c: true}) {
     var x, y, z;
 }
@@ -10,3 +9,11 @@ function f(_a) {
     var _a = { a: 1, b: "2", c: true };
     var x, y, z;
 }
+
+
+//// [emptyObjectBindingPatternParameter04.d.ts]
+declare function f({}?: {
+    a: number;
+    b: string;
+    c: boolean;
+}): void;
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter04.symbols b/tests/baselines/reference/emptyObjectBindingPatternParameter04.symbols
index 9922d4cd074..1b594d9e38a 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter04.symbols
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter04.symbols
@@ -1,14 +1,13 @@
 === tests/cases/conformance/es6/destructuring/emptyObjectBindingPatternParameter04.ts ===
 
-
 function f({} = {a: 1, b: "2", c: true}) {
 >f : Symbol(f, Decl(emptyObjectBindingPatternParameter04.ts, 0, 0))
->a : Symbol(a, Decl(emptyObjectBindingPatternParameter04.ts, 2, 17))
->b : Symbol(b, Decl(emptyObjectBindingPatternParameter04.ts, 2, 22))
->c : Symbol(c, Decl(emptyObjectBindingPatternParameter04.ts, 2, 30))
+>a : Symbol(a, Decl(emptyObjectBindingPatternParameter04.ts, 1, 17))
+>b : Symbol(b, Decl(emptyObjectBindingPatternParameter04.ts, 1, 22))
+>c : Symbol(c, Decl(emptyObjectBindingPatternParameter04.ts, 1, 30))
 
     var x, y, z;
->x : Symbol(x, Decl(emptyObjectBindingPatternParameter04.ts, 3, 7))
->y : Symbol(y, Decl(emptyObjectBindingPatternParameter04.ts, 3, 10))
->z : Symbol(z, Decl(emptyObjectBindingPatternParameter04.ts, 3, 13))
+>x : Symbol(x, Decl(emptyObjectBindingPatternParameter04.ts, 2, 7))
+>y : Symbol(y, Decl(emptyObjectBindingPatternParameter04.ts, 2, 10))
+>z : Symbol(z, Decl(emptyObjectBindingPatternParameter04.ts, 2, 13))
 }
diff --git a/tests/baselines/reference/emptyObjectBindingPatternParameter04.types b/tests/baselines/reference/emptyObjectBindingPatternParameter04.types
index 5ee32d422a9..fddc23e854a 100644
--- a/tests/baselines/reference/emptyObjectBindingPatternParameter04.types
+++ b/tests/baselines/reference/emptyObjectBindingPatternParameter04.types
@@ -1,6 +1,5 @@
 === tests/cases/conformance/es6/destructuring/emptyObjectBindingPatternParameter04.ts ===
 
-
 function f({} = {a: 1, b: "2", c: true}) {
 >f : ({}?: { a: number; b: string; c: boolean; }) => void
 >{a: 1, b: "2", c: true} : { a: number; b: string; c: boolean; }