diff --git a/src/lib/es2021.intl.d.ts b/src/lib/es2021.intl.d.ts
index 2adfe49056882..0476912be325f 100644
--- a/src/lib/es2021.intl.d.ts
+++ b/src/lib/es2021.intl.d.ts
@@ -8,6 +8,11 @@ declare namespace Intl {
         fractionalSecondDigits?: 0 | 1 | 2 | 3 | undefined;
     }
 
+    interface DateTimeFormat {
+        formatRange(startDate: Date | number | bigint, endDate: Date | number | bigint): string;
+        formatRangeToParts(startDate: Date | number | bigint, endDate: Date | number | bigint): DateTimeFormatPart[];
+    }
+
     interface ResolvedDateTimeFormatOptions {
         formatMatcher?: "basic" | "best fit" | "best fit";
         dateStyle?: "full" | "long" | "medium" | "short";
@@ -16,9 +21,4 @@ declare namespace Intl {
         dayPeriod?: "narrow" | "short" | "long";
         fractionalSecondDigits?: 0 | 1 | 2 | 3;
     }
-
-    interface NumberFormat {
-        formatRange(startDate: number | bigint, endDate: number | bigint): string;
-        formatRangeToParts(startDate: number | bigint, endDate: number | bigint): NumberFormatPart[];
-    }
-}
\ No newline at end of file
+}
diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
index a7eab086b5503..2c491a5023475 100644
--- a/src/lib/es5.d.ts
+++ b/src/lib/es5.d.ts
@@ -4385,6 +4385,7 @@ declare namespace Intl {
         new(locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
         (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
         supportedLocalesOf(locales: string | string[], options?: NumberFormatOptions): string[];
+        readonly prototype: NumberFormat;
     };
 
     interface DateTimeFormatOptions {
@@ -4428,6 +4429,7 @@ declare namespace Intl {
         new(locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
         (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
         supportedLocalesOf(locales: string | string[], options?: DateTimeFormatOptions): string[];
+        readonly prototype: DateTimeFormat;
     };
 }
 
diff --git a/src/lib/esnext.intl.d.ts b/src/lib/esnext.intl.d.ts
index ab7d8421b5fab..a8baa0e4cc68d 100644
--- a/src/lib/esnext.intl.d.ts
+++ b/src/lib/esnext.intl.d.ts
@@ -1,6 +1,6 @@
 declare namespace Intl {
-
-   interface DateTimeFormat {
-      formatRange(startName: Date, endNumber: Date): string;
-   }
+  interface NumberFormat {
+    formatRange(start: number | bigint, end: number | bigint): string;
+    formatRangeToParts(start: number | bigint, end: number | bigint): NumberFormatPart[];
+  }
 }
diff --git a/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.errors.txt b/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.errors.txt
new file mode 100644
index 0000000000000..e93066c44c174
--- /dev/null
+++ b/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.errors.txt
@@ -0,0 +1,19 @@
+tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts(1,29): error TS2339: Property 'formatRange' does not exist on type 'NumberFormat'.
+tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts(4,25): error TS2339: Property 'formatRange' does not exist on type 'NumberFormat'.
+tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts(5,25): error TS2339: Property 'formatRangeToParts' does not exist on type 'NumberFormat'.
+
+
+==== tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts (3 errors) ====
+    Intl.NumberFormat.prototype.formatRange
+                                ~~~~~~~~~~~
+!!! error TS2339: Property 'formatRange' does not exist on type 'NumberFormat'.
+    Intl.DateTimeFormat.prototype.formatRange
+    
+    new Intl.NumberFormat().formatRange 
+                            ~~~~~~~~~~~
+!!! error TS2339: Property 'formatRange' does not exist on type 'NumberFormat'.
+    new Intl.NumberFormat().formatRangeToParts
+                            ~~~~~~~~~~~~~~~~~~
+!!! error TS2339: Property 'formatRangeToParts' does not exist on type 'NumberFormat'.
+    new Intl.DateTimeFormat().formatRange
+    new Intl.DateTimeFormat().formatRangeToParts
\ No newline at end of file
diff --git a/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.js b/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.js
new file mode 100644
index 0000000000000..daa7bd00d4b3b
--- /dev/null
+++ b/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.js
@@ -0,0 +1,16 @@
+//// [DateTimeFormatAndNumberFormatES2021.ts]
+Intl.NumberFormat.prototype.formatRange
+Intl.DateTimeFormat.prototype.formatRange
+
+new Intl.NumberFormat().formatRange 
+new Intl.NumberFormat().formatRangeToParts
+new Intl.DateTimeFormat().formatRange
+new Intl.DateTimeFormat().formatRangeToParts
+
+//// [DateTimeFormatAndNumberFormatES2021.js]
+Intl.NumberFormat.prototype.formatRange;
+Intl.DateTimeFormat.prototype.formatRange;
+new Intl.NumberFormat().formatRange;
+new Intl.NumberFormat().formatRangeToParts;
+new Intl.DateTimeFormat().formatRange;
+new Intl.DateTimeFormat().formatRangeToParts;
diff --git a/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.symbols b/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.symbols
new file mode 100644
index 0000000000000..226ba3eaefd42
--- /dev/null
+++ b/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.symbols
@@ -0,0 +1,41 @@
+=== tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts ===
+Intl.NumberFormat.prototype.formatRange
+>Intl.NumberFormat.prototype : Symbol(prototype, Decl(lib.es5.d.ts, --, --))
+>Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
+>Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 1 more)
+>NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
+>prototype : Symbol(prototype, Decl(lib.es5.d.ts, --, --))
+
+Intl.DateTimeFormat.prototype.formatRange
+>Intl.DateTimeFormat.prototype.formatRange : Symbol(Intl.DateTimeFormat.formatRange, Decl(lib.es2021.intl.d.ts, --, --))
+>Intl.DateTimeFormat.prototype : Symbol(prototype, Decl(lib.es5.d.ts, --, --))
+>Intl.DateTimeFormat : Symbol(Intl.DateTimeFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 1 more)
+>DateTimeFormat : Symbol(Intl.DateTimeFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>prototype : Symbol(prototype, Decl(lib.es5.d.ts, --, --))
+>formatRange : Symbol(Intl.DateTimeFormat.formatRange, Decl(lib.es2021.intl.d.ts, --, --))
+
+new Intl.NumberFormat().formatRange 
+>Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
+>Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 1 more)
+>NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
+
+new Intl.NumberFormat().formatRangeToParts
+>Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
+>Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 1 more)
+>NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
+
+new Intl.DateTimeFormat().formatRange
+>new Intl.DateTimeFormat().formatRange : Symbol(Intl.DateTimeFormat.formatRange, Decl(lib.es2021.intl.d.ts, --, --))
+>Intl.DateTimeFormat : Symbol(Intl.DateTimeFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 1 more)
+>DateTimeFormat : Symbol(Intl.DateTimeFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>formatRange : Symbol(Intl.DateTimeFormat.formatRange, Decl(lib.es2021.intl.d.ts, --, --))
+
+new Intl.DateTimeFormat().formatRangeToParts
+>new Intl.DateTimeFormat().formatRangeToParts : Symbol(Intl.DateTimeFormat.formatRangeToParts, Decl(lib.es2021.intl.d.ts, --, --))
+>Intl.DateTimeFormat : Symbol(Intl.DateTimeFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 1 more)
+>DateTimeFormat : Symbol(Intl.DateTimeFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>formatRangeToParts : Symbol(Intl.DateTimeFormat.formatRangeToParts, Decl(lib.es2021.intl.d.ts, --, --))
+
diff --git a/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.types b/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.types
new file mode 100644
index 0000000000000..98f06e294c4f8
--- /dev/null
+++ b/tests/baselines/reference/DateTimeFormatAndNumberFormatES2021.types
@@ -0,0 +1,51 @@
+=== tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts ===
+Intl.NumberFormat.prototype.formatRange
+>Intl.NumberFormat.prototype.formatRange : any
+>Intl.NumberFormat.prototype : Intl.NumberFormat
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
+>Intl : typeof Intl
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
+>prototype : Intl.NumberFormat
+>formatRange : any
+
+Intl.DateTimeFormat.prototype.formatRange
+>Intl.DateTimeFormat.prototype.formatRange : (startDate: number | bigint | Date, endDate: number | bigint | Date) => string
+>Intl.DateTimeFormat.prototype : Intl.DateTimeFormat
+>Intl.DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
+>Intl : typeof Intl
+>DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
+>prototype : Intl.DateTimeFormat
+>formatRange : (startDate: number | bigint | Date, endDate: number | bigint | Date) => string
+
+new Intl.NumberFormat().formatRange 
+>new Intl.NumberFormat().formatRange : any
+>new Intl.NumberFormat() : Intl.NumberFormat
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
+>Intl : typeof Intl
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
+>formatRange : any
+
+new Intl.NumberFormat().formatRangeToParts
+>new Intl.NumberFormat().formatRangeToParts : any
+>new Intl.NumberFormat() : Intl.NumberFormat
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
+>Intl : typeof Intl
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
+>formatRangeToParts : any
+
+new Intl.DateTimeFormat().formatRange
+>new Intl.DateTimeFormat().formatRange : (startDate: number | bigint | Date, endDate: number | bigint | Date) => string
+>new Intl.DateTimeFormat() : Intl.DateTimeFormat
+>Intl.DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
+>Intl : typeof Intl
+>DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
+>formatRange : (startDate: number | bigint | Date, endDate: number | bigint | Date) => string
+
+new Intl.DateTimeFormat().formatRangeToParts
+>new Intl.DateTimeFormat().formatRangeToParts : (startDate: number | bigint | Date, endDate: number | bigint | Date) => Intl.DateTimeFormatPart[]
+>new Intl.DateTimeFormat() : Intl.DateTimeFormat
+>Intl.DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
+>Intl : typeof Intl
+>DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
+>formatRangeToParts : (startDate: number | bigint | Date, endDate: number | bigint | Date) => Intl.DateTimeFormatPart[]
+
diff --git a/tests/baselines/reference/bigintWithLib.types b/tests/baselines/reference/bigintWithLib.types
index 802aa7c0b5500..6009dd01cfc64 100644
--- a/tests/baselines/reference/bigintWithLib.types
+++ b/tests/baselines/reference/bigintWithLib.types
@@ -390,9 +390,9 @@ new Intl.NumberFormat("fr").format(3000n);
 >new Intl.NumberFormat("fr").format(3000n) : string
 >new Intl.NumberFormat("fr").format : { (value: number): string; (value: number | bigint): string; }
 >new Intl.NumberFormat("fr") : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >"fr" : "fr"
 >format : { (value: number): string; (value: number | bigint): string; }
 >3000n : 3000n
@@ -401,9 +401,9 @@ new Intl.NumberFormat("fr").format(bigintVal);
 >new Intl.NumberFormat("fr").format(bigintVal) : string
 >new Intl.NumberFormat("fr").format : { (value: number): string; (value: number | bigint): string; }
 >new Intl.NumberFormat("fr") : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >"fr" : "fr"
 >format : { (value: number): string; (value: number | bigint): string; }
 >bigintVal : bigint
diff --git a/tests/baselines/reference/bigintWithoutLib.types b/tests/baselines/reference/bigintWithoutLib.types
index d10dc725b598a..f0e50102edef3 100644
--- a/tests/baselines/reference/bigintWithoutLib.types
+++ b/tests/baselines/reference/bigintWithoutLib.types
@@ -374,9 +374,9 @@ new Intl.NumberFormat("fr").format(3000n);
 >new Intl.NumberFormat("fr").format(3000n) : string
 >new Intl.NumberFormat("fr").format : (value: number) => string
 >new Intl.NumberFormat("fr") : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >"fr" : "fr"
 >format : (value: number) => string
 >3000n : 3000n
@@ -385,9 +385,9 @@ new Intl.NumberFormat("fr").format(bigintVal);
 >new Intl.NumberFormat("fr").format(bigintVal) : string
 >new Intl.NumberFormat("fr").format : (value: number) => string
 >new Intl.NumberFormat("fr") : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >"fr" : "fr"
 >format : (value: number) => string
 >bigintVal : bigint
diff --git a/tests/baselines/reference/doYouNeedToChangeYourTargetLibraryES2016Plus.types b/tests/baselines/reference/doYouNeedToChangeYourTargetLibraryES2016Plus.types
index c8408cb3cece5..a085da824fb83 100644
--- a/tests/baselines/reference/doYouNeedToChangeYourTargetLibraryES2016Plus.types
+++ b/tests/baselines/reference/doYouNeedToChangeYourTargetLibraryES2016Plus.types
@@ -55,9 +55,9 @@ const testIntlFormatToParts = new Intl.DateTimeFormat("en-US").formatToParts();
 >new Intl.DateTimeFormat("en-US").formatToParts() : any
 >new Intl.DateTimeFormat("en-US").formatToParts : any
 >new Intl.DateTimeFormat("en-US") : Intl.DateTimeFormat
->Intl.DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; }
+>Intl.DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
 >Intl : typeof Intl
->DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; }
+>DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
 >"en-US" : "en-US"
 >formatToParts : any
 
@@ -152,9 +152,9 @@ const testNumberFormatFormatToParts = new Intl.NumberFormat("en-US").formatToPar
 >new Intl.NumberFormat("en-US").formatToParts() : any
 >new Intl.NumberFormat("en-US").formatToParts : any
 >new Intl.NumberFormat("en-US") : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >"en-US" : "en-US"
 >formatToParts : any
 
diff --git a/tests/baselines/reference/es2020IntlAPIs.types b/tests/baselines/reference/es2020IntlAPIs.types
index f1315c55e9c9f..4a5332ed64c33 100644
--- a/tests/baselines/reference/es2020IntlAPIs.types
+++ b/tests/baselines/reference/es2020IntlAPIs.types
@@ -25,18 +25,18 @@ function log(locale: string) {
 >new Intl.DateTimeFormat(locale).format(date) : string
 >new Intl.DateTimeFormat(locale).format : (date?: number | Date) => string
 >new Intl.DateTimeFormat(locale) : Intl.DateTimeFormat
->Intl.DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; }
+>Intl.DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
 >Intl : typeof Intl
->DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; }
+>DateTimeFormat : { (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; new (locales?: string | string[], options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat; supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions): string[]; readonly prototype: Intl.DateTimeFormat; }
 >locale : string
 >format : (date?: number | Date) => string
 >date : Date
 >new Intl.NumberFormat(locale).format(count) : string
 >new Intl.NumberFormat(locale).format : { (value: number): string; (value: number | bigint): string; }
 >new Intl.NumberFormat(locale) : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >locale : string
 >format : { (value: number): string; (value: number | bigint): string; }
 >count : 26254.39
diff --git a/tests/baselines/reference/formatToPartsBigInt.symbols b/tests/baselines/reference/formatToPartsBigInt.symbols
index 1bdd0c8226002..41d4f83b1d989 100644
--- a/tests/baselines/reference/formatToPartsBigInt.symbols
+++ b/tests/baselines/reference/formatToPartsBigInt.symbols
@@ -4,16 +4,16 @@
 // Test Intl methods with new parameter type
 new Intl.NumberFormat("fr").formatToParts(3000n);
 >new Intl.NumberFormat("fr").formatToParts : Symbol(Intl.NumberFormat.formatToParts, Decl(lib.es2018.intl.d.ts, --, --))
->Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.esnext.intl.d.ts, --, --))
 >Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 2 more)
->NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.esnext.intl.d.ts, --, --))
 >formatToParts : Symbol(Intl.NumberFormat.formatToParts, Decl(lib.es2018.intl.d.ts, --, --))
 
 new Intl.NumberFormat("fr").formatToParts(BigInt(123));
 >new Intl.NumberFormat("fr").formatToParts : Symbol(Intl.NumberFormat.formatToParts, Decl(lib.es2018.intl.d.ts, --, --))
->Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.esnext.intl.d.ts, --, --))
 >Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 2 more)
->NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.esnext.intl.d.ts, --, --))
 >formatToParts : Symbol(Intl.NumberFormat.formatToParts, Decl(lib.es2018.intl.d.ts, --, --))
 >BigInt : Symbol(BigInt, Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
 
diff --git a/tests/baselines/reference/formatToPartsBigInt.types b/tests/baselines/reference/formatToPartsBigInt.types
index fc911ed065711..d3eeb2247a7b4 100644
--- a/tests/baselines/reference/formatToPartsBigInt.types
+++ b/tests/baselines/reference/formatToPartsBigInt.types
@@ -6,9 +6,9 @@ new Intl.NumberFormat("fr").formatToParts(3000n);
 >new Intl.NumberFormat("fr").formatToParts(3000n) : Intl.NumberFormatPart[]
 >new Intl.NumberFormat("fr").formatToParts : (number?: number | bigint) => Intl.NumberFormatPart[]
 >new Intl.NumberFormat("fr") : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >"fr" : "fr"
 >formatToParts : (number?: number | bigint) => Intl.NumberFormatPart[]
 >3000n : 3000n
@@ -17,9 +17,9 @@ new Intl.NumberFormat("fr").formatToParts(BigInt(123));
 >new Intl.NumberFormat("fr").formatToParts(BigInt(123)) : Intl.NumberFormatPart[]
 >new Intl.NumberFormat("fr").formatToParts : (number?: number | bigint) => Intl.NumberFormatPart[]
 >new Intl.NumberFormat("fr") : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; readonly prototype: Intl.NumberFormat; }
 >"fr" : "fr"
 >formatToParts : (number?: number | bigint) => Intl.NumberFormatPart[]
 >BigInt(123) : bigint
diff --git a/tests/baselines/reference/numberFormatCurrencySign.symbols b/tests/baselines/reference/numberFormatCurrencySign.symbols
index 2049480e3c18a..0a22340bcc554 100644
--- a/tests/baselines/reference/numberFormatCurrencySign.symbols
+++ b/tests/baselines/reference/numberFormatCurrencySign.symbols
@@ -2,9 +2,9 @@
 const str = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format(999999);
 >str : Symbol(str, Decl(numberFormatCurrencySign.ts, 0, 5))
 >new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format : Symbol(Intl.NumberFormat.format, Decl(lib.es5.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
->Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.esnext.intl.d.ts, --, --))
 >Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 2 more)
->NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.esnext.intl.d.ts, --, --))
 >style : Symbol(style, Decl(numberFormatCurrencySign.ts, 0, 44))
 >currency : Symbol(currency, Decl(numberFormatCurrencySign.ts, 0, 63))
 >currencySign : Symbol(currencySign, Decl(numberFormatCurrencySign.ts, 0, 80))
diff --git a/tests/baselines/reference/numberFormatCurrencySign.types b/tests/baselines/reference/numberFormatCurrencySign.types
index 7b88d597715a9..02ccb864c8537 100644
--- a/tests/baselines/reference/numberFormatCurrencySign.types
+++ b/tests/baselines/reference/numberFormatCurrencySign.types
@@ -4,9 +4,9 @@ const str = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD',
 >new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format(999999) : string
 >new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format : { (value: number): string; (value: number | bigint): string; }
 >new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }) : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; new (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions | undefined): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; new (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions | undefined): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; new (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions | undefined): string[]; }
+>NumberFormat : { (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; new (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions | undefined): string[]; readonly prototype: Intl.NumberFormat; }
 >'en-NZ' : "en-NZ"
 >{ style: 'currency', currency: 'NZD', currencySign: 'accounting' } : { style: string; currency: string; currencySign: string; }
 >style : string
diff --git a/tests/baselines/reference/numberFormatCurrencySignResolved.symbols b/tests/baselines/reference/numberFormatCurrencySignResolved.symbols
index d73d3d91dc52f..4c1b52928b0ab 100644
--- a/tests/baselines/reference/numberFormatCurrencySignResolved.symbols
+++ b/tests/baselines/reference/numberFormatCurrencySignResolved.symbols
@@ -2,9 +2,9 @@
 const options = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).resolvedOptions();
 >options : Symbol(options, Decl(numberFormatCurrencySignResolved.ts, 0, 5))
 >new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).resolvedOptions : Symbol(Intl.NumberFormat.resolvedOptions, Decl(lib.es5.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
->Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.esnext.intl.d.ts, --, --))
 >Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --), Decl(lib.es2017.intl.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.intl.d.ts, --, --) ... and 2 more)
->NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2021.intl.d.ts, --, --))
+>NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2018.intl.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.esnext.intl.d.ts, --, --))
 >style : Symbol(style, Decl(numberFormatCurrencySignResolved.ts, 0, 48))
 >currency : Symbol(currency, Decl(numberFormatCurrencySignResolved.ts, 0, 67))
 >currencySign : Symbol(currencySign, Decl(numberFormatCurrencySignResolved.ts, 0, 84))
diff --git a/tests/baselines/reference/numberFormatCurrencySignResolved.types b/tests/baselines/reference/numberFormatCurrencySignResolved.types
index b777f8949689f..ac27d12ca9854 100644
--- a/tests/baselines/reference/numberFormatCurrencySignResolved.types
+++ b/tests/baselines/reference/numberFormatCurrencySignResolved.types
@@ -4,9 +4,9 @@ const options = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'N
 >new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).resolvedOptions() : Intl.ResolvedNumberFormatOptions
 >new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).resolvedOptions : { (): Intl.ResolvedNumberFormatOptions; (): Intl.ResolvedNumberFormatOptions; }
 >new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }) : Intl.NumberFormat
->Intl.NumberFormat : { (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; new (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions | undefined): string[]; }
+>Intl.NumberFormat : { (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; new (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions | undefined): string[]; readonly prototype: Intl.NumberFormat; }
 >Intl : typeof Intl
->NumberFormat : { (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; new (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions | undefined): string[]; }
+>NumberFormat : { (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; new (locales?: string | string[] | undefined, options?: Intl.NumberFormatOptions | undefined): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions | undefined): string[]; readonly prototype: Intl.NumberFormat; }
 >'en-NZ' : "en-NZ"
 >{ style: 'currency', currency: 'NZD', currencySign: 'accounting' } : { style: string; currency: string; currencySign: string; }
 >style : string
diff --git a/tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts b/tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts
new file mode 100644
index 0000000000000..0ad9eca72e850
--- /dev/null
+++ b/tests/cases/compiler/DateTimeFormatAndNumberFormatES2021.ts
@@ -0,0 +1,8 @@
+// @lib: es2021
+Intl.NumberFormat.prototype.formatRange
+Intl.DateTimeFormat.prototype.formatRange
+
+new Intl.NumberFormat().formatRange 
+new Intl.NumberFormat().formatRangeToParts
+new Intl.DateTimeFormat().formatRange
+new Intl.DateTimeFormat().formatRangeToParts
\ No newline at end of file