diff --git a/internal/transformers/declarations/transform.go b/internal/transformers/declarations/transform.go
index 647f516357..075c3d6644 100644
--- a/internal/transformers/declarations/transform.go
+++ b/internal/transformers/declarations/transform.go
@@ -1167,7 +1167,7 @@ func (tx *DeclarationTransformer) transformModuleDeclaration(input *ast.ModuleDe
 	tx.needsDeclare = false
 	inner := input.Body
 	keyword := input.Keyword
-	if input.Name() == nil || !ast.IsStringLiteral(input.Name()) {
+	if keyword != ast.KindGlobalKeyword && (input.Name() == nil || !ast.IsStringLiteral(input.Name())) {
 		keyword = ast.KindNamespaceKeyword
 	}
 
diff --git a/testdata/baselines/reference/submodule/compiler/declarationEmitRetainsJsdocyComments.js b/testdata/baselines/reference/submodule/compiler/declarationEmitRetainsJsdocyComments.js
index a1bcf4f1ac..6211ab2063 100644
--- a/testdata/baselines/reference/submodule/compiler/declarationEmitRetainsJsdocyComments.js
+++ b/testdata/baselines/reference/submodule/compiler/declarationEmitRetainsJsdocyComments.js
@@ -113,7 +113,7 @@ export declare class Foo {
      */
     bar(s: number): void;
 }
-declare namespace global {
+declare global {
     interface ExtFunc {
         /**
         * comment6
@@ -121,4 +121,3 @@ declare namespace global {
         someMethod(collection: any[]): boolean;
     }
 }
-export {};
diff --git a/testdata/baselines/reference/submodule/compiler/declarationEmitRetainsJsdocyComments.js.diff b/testdata/baselines/reference/submodule/compiler/declarationEmitRetainsJsdocyComments.js.diff
index f34f7272b8..31a3a76f25 100644
--- a/testdata/baselines/reference/submodule/compiler/declarationEmitRetainsJsdocyComments.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/declarationEmitRetainsJsdocyComments.js.diff
@@ -38,13 +38,6 @@
 -* comment5
 -*/
 -someMethod: any;
--declare global {
-+declare namespace global {
+ declare global {
      interface ExtFunc {
-         /**
-         * comment6
-@@= skipped -13, +8 lines =@@
-         someMethod(collection: any[]): boolean;
-     }
- }
-+export {};
\ No newline at end of file
+         /**
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal1.js b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal1.js
index 6640282317..32336d5912 100644
--- a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal1.js
+++ b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal1.js
@@ -39,9 +39,8 @@ export declare class A {
 //// [f2.d.ts]
 import { A } from "./f1";
 // change the shape of Array<T>
-declare namespace global {
+declare global {
     interface Array<T> {
         getA(): A;
     }
 }
-export {};
diff --git a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal1.js.diff b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal1.js.diff
index 4148f7e8d3..76a1064f43 100644
--- a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal1.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal1.js.diff
@@ -12,11 +12,7 @@
  }
  //// [f2.d.ts]
  import { A } from "./f1";
--declare global {
 +// change the shape of Array<T>
-+declare namespace global {
+ declare global {
      interface Array<T> {
-         getA(): A;
-     }
- }
-+export {};
\ No newline at end of file
+         getA(): A;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal2.js b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal2.js
index a1fee14aaf..35074ca47e 100644
--- a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal2.js
+++ b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal2.js
@@ -35,7 +35,7 @@ let y = x.getCountAsString().toLowerCase();
 export declare class A {
 }
 //// [f2.d.ts]
-declare namespace global {
+declare global {
     interface Array<T> {
         getCountAsString(): string;
     }
diff --git a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal2.js.diff b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal2.js.diff
deleted file mode 100644
index 7d0a9df9b9..0000000000
--- a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal2.js.diff
+++ /dev/null
@@ -1,11 +0,0 @@
---- old.moduleAugmentationGlobal2.js
-+++ new.moduleAugmentationGlobal2.js
-@@= skipped -34, +34 lines =@@
- export declare class A {
- }
- //// [f2.d.ts]
--declare global {
-+declare namespace global {
-     interface Array<T> {
-         getCountAsString(): string;
-     }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal3.js b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal3.js
index 01fdfd85cd..1f2b4c1596 100644
--- a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal3.js
+++ b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal3.js
@@ -42,7 +42,7 @@ let y = x.getCountAsString().toLowerCase();
 export declare class A {
 }
 //// [f2.d.ts]
-declare namespace global {
+declare global {
     interface Array<T> {
         getCountAsString(): string;
     }
diff --git a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal3.js.diff b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal3.js.diff
deleted file mode 100644
index 76d60358de..0000000000
--- a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal3.js.diff
+++ /dev/null
@@ -1,11 +0,0 @@
---- old.moduleAugmentationGlobal3.js
-+++ new.moduleAugmentationGlobal3.js
-@@= skipped -41, +41 lines =@@
- export declare class A {
- }
- //// [f2.d.ts]
--declare global {
-+declare namespace global {
-     interface Array<T> {
-         getCountAsString(): string;
-     }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal4.js b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal4.js
index 96951df31d..4124a7e4f3 100644
--- a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal4.js
+++ b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal4.js
@@ -30,14 +30,14 @@ require("./f2");
 
 
 //// [f1.d.ts]
-declare namespace global {
+declare global {
     interface Something {
         x: any;
     }
 }
 export {};
 //// [f2.d.ts]
-declare namespace global {
+declare global {
     interface Something {
         y: any;
     }
diff --git a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal4.js.diff b/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal4.js.diff
deleted file mode 100644
index 4e3a3c9e63..0000000000
--- a/testdata/baselines/reference/submodule/compiler/moduleAugmentationGlobal4.js.diff
+++ /dev/null
@@ -1,19 +0,0 @@
---- old.moduleAugmentationGlobal4.js
-+++ new.moduleAugmentationGlobal4.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [f1.d.ts]
--declare global {
-+declare namespace global {
-     interface Something {
-         x: any;
-     }
- }
- export {};
- //// [f2.d.ts]
--declare global {
-+declare namespace global {
-     interface Something {
-         y: any;
-     }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/moduleDeclarationExportStarShadowingGlobalIsNameable.js b/testdata/baselines/reference/submodule/compiler/moduleDeclarationExportStarShadowingGlobalIsNameable.js
index 407de174f9..05a55dc77c 100644
--- a/testdata/baselines/reference/submodule/compiler/moduleDeclarationExportStarShadowingGlobalIsNameable.js
+++ b/testdata/baselines/reference/submodule/compiler/moduleDeclarationExportStarShadowingGlobalIsNameable.js
@@ -65,7 +65,7 @@ export { Account2 as Acc };
 //// [index.d.ts]
 export * from "./account";
 //// [index.d.ts]
-declare namespace global {
+declare global {
     interface Account {
         someProp: number;
     }
@@ -75,4 +75,3 @@ declare namespace global {
 }
 import * as model from "./model";
 export declare const func: (account: model.Account, acc2: model.Acc) => void;
-export {};
diff --git a/testdata/baselines/reference/submodule/compiler/moduleDeclarationExportStarShadowingGlobalIsNameable.js.diff b/testdata/baselines/reference/submodule/compiler/moduleDeclarationExportStarShadowingGlobalIsNameable.js.diff
deleted file mode 100644
index 0edec3dea1..0000000000
--- a/testdata/baselines/reference/submodule/compiler/moduleDeclarationExportStarShadowingGlobalIsNameable.js.diff
+++ /dev/null
@@ -1,16 +0,0 @@
---- old.moduleDeclarationExportStarShadowingGlobalIsNameable.js
-+++ new.moduleDeclarationExportStarShadowingGlobalIsNameable.js
-@@= skipped -64, +64 lines =@@
- //// [index.d.ts]
- export * from "./account";
- //// [index.d.ts]
--declare global {
-+declare namespace global {
-     interface Account {
-         someProp: number;
-     }
-@@= skipped -10, +10 lines =@@
- }
- import * as model from "./model";
- export declare const func: (account: model.Account, acc2: model.Acc) => void;
-+export {};
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/leaveOptionalParameterAsWritten.js b/testdata/baselines/reference/submodule/conformance/leaveOptionalParameterAsWritten.js
index 40858d9de3..aa0c0ca22d 100644
--- a/testdata/baselines/reference/submodule/conformance/leaveOptionalParameterAsWritten.js
+++ b/testdata/baselines/reference/submodule/conformance/leaveOptionalParameterAsWritten.js
@@ -24,13 +24,12 @@ export interface Foo {
 }
 //// [b.d.ts]
 import * as a from "./a";
-declare namespace global {
+declare global {
     namespace teams {
         namespace calling {
             export import Foo = a.Foo;
         }
     }
 }
-export {};
 //// [c.d.ts]
 export declare const bar: (p?: import("./a").Foo | undefined) => void;
diff --git a/testdata/baselines/reference/submodule/conformance/leaveOptionalParameterAsWritten.js.diff b/testdata/baselines/reference/submodule/conformance/leaveOptionalParameterAsWritten.js.diff
index 4e943d44ef..9b5671baa5 100644
--- a/testdata/baselines/reference/submodule/conformance/leaveOptionalParameterAsWritten.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/leaveOptionalParameterAsWritten.js.diff
@@ -1,20 +1,10 @@
 --- old.leaveOptionalParameterAsWritten.js
 +++ new.leaveOptionalParameterAsWritten.js
-@@= skipped -23, +23 lines =@@
- }
- //// [b.d.ts]
- import * as a from "./a";
--declare global {
-+declare namespace global {
-     namespace teams {
-         namespace calling {
-             export import Foo = a.Foo;
-         }
+@@= skipped -31, +31 lines =@@
      }
  }
--//// [c.d.ts]
+ //// [c.d.ts]
 -type Foo = teams.calling.Foo;
 -export declare const bar: (p?: Foo) => void;
- export {};
-+//// [c.d.ts]
+-export {};
 +export declare const bar: (p?: import("./a").Foo | undefined) => void;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/symbolProperty61.js b/testdata/baselines/reference/submodule/conformance/symbolProperty61.js
index 4659f8ec8c..3ed2223c95 100644
--- a/testdata/baselines/reference/submodule/conformance/symbolProperty61.js
+++ b/testdata/baselines/reference/submodule/conformance/symbolProperty61.js
@@ -53,7 +53,7 @@ from(new MyObservable(42));
 
 
 //// [symbolProperty61.d.ts]
-declare namespace global {
+declare global {
     interface SymbolConstructor {
         readonly obs: symbol;
     }
@@ -64,4 +64,3 @@ export declare class MyObservable<T> {
     constructor(_val: T);
     subscribe(next: (val: T) => void): void;
 }
-export {};
diff --git a/testdata/baselines/reference/submodule/conformance/symbolProperty61.js.diff b/testdata/baselines/reference/submodule/conformance/symbolProperty61.js.diff
index 5f2bd9e531..d108f7ff87 100644
--- a/testdata/baselines/reference/submodule/conformance/symbolProperty61.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/symbolProperty61.js.diff
@@ -8,13 +8,7 @@
      constructor(_val) {
          this._val = _val;
      }
-@@= skipped -17, +18 lines =@@
-
-
- //// [symbolProperty61.d.ts]
--declare global {
-+declare namespace global {
-     interface SymbolConstructor {
+@@= skipped -22, +23 lines =@@
          readonly obs: symbol;
      }
  }
@@ -26,4 +20,4 @@
      subscribe(next: (val: T) => void): void;
 -    [observable](): this;
  }
- export {};
\ No newline at end of file
+-export {};
\ No newline at end of file