diff --git a/packages/core/src/currentScopes.ts b/packages/core/src/currentScopes.ts
index 07e26d9a96b6..1e68c9583372 100644
--- a/packages/core/src/currentScopes.ts
+++ b/packages/core/src/currentScopes.ts
@@ -1,15 +1,10 @@
 import type { Scope } from '@sentry/types';
 import type { Client } from '@sentry/types';
+import { getGlobalSingleton } from '@sentry/utils';
 import { getMainCarrier } from './asyncContext';
 import { getAsyncContextStrategy } from './hub';
 import { Scope as ScopeClass } from './scope';
 
-/**
- * The global scope is kept in this module.
- * When accessing it, we'll make sure to set one if none is currently present.
- */
-let globalScope: Scope | undefined;
-
 /**
  * Get the currently active scope.
  */
@@ -34,20 +29,7 @@ export function getIsolationScope(): Scope {
  * This scope is applied to _all_ events.
  */
 export function getGlobalScope(): Scope {
-  if (!globalScope) {
-    globalScope = new ScopeClass();
-  }
-
-  return globalScope;
-}
-
-/**
- * This is mainly needed for tests.
- * DO NOT USE this, as this is an internal API and subject to change.
- * @hidden
- */
-export function setGlobalScope(scope: Scope | undefined): void {
-  globalScope = scope;
+  return getGlobalSingleton('globalScope', () => new ScopeClass());
 }
 
 /**
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 52841ee68a6d..3fe4d4b3a59a 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -43,7 +43,6 @@ export {
   getCurrentScope,
   getIsolationScope,
   getGlobalScope,
-  setGlobalScope,
   withScope,
   withIsolationScope,
   getClient,
diff --git a/packages/core/src/metrics/exports.ts b/packages/core/src/metrics/exports.ts
index c946f3780f8b..2ed0d9cb9d51 100644
--- a/packages/core/src/metrics/exports.ts
+++ b/packages/core/src/metrics/exports.ts
@@ -4,7 +4,7 @@ import type {
   MetricsAggregator as MetricsAggregatorInterface,
   Primitive,
 } from '@sentry/types';
-import { logger } from '@sentry/utils';
+import { getGlobalSingleton, logger } from '@sentry/utils';
 import { getCurrentScope } from '../currentScopes';
 import { getClient } from '../currentScopes';
 import { DEBUG_BUILD } from '../debug-build';
@@ -23,11 +23,6 @@ type MetricsAggregatorConstructor = {
   new (client: Client): MetricsAggregatorInterface;
 };
 
-/**
- * A metrics aggregator instance per Client.
- */
-let globalMetricsAggregators: WeakMap<Client, MetricsAggregatorInterface> | undefined;
-
 /**
  * Gets the metrics aggregator for a given client.
  * @param client The client for which to get the metrics aggregator.
@@ -37,9 +32,10 @@ function getMetricsAggregatorForClient(
   client: Client,
   Aggregator: MetricsAggregatorConstructor,
 ): MetricsAggregatorInterface {
-  if (!globalMetricsAggregators) {
-    globalMetricsAggregators = new WeakMap();
-  }
+  const globalMetricsAggregators = getGlobalSingleton<WeakMap<Client, MetricsAggregatorInterface>>(
+    'globalMetricsAggregators',
+    () => new WeakMap(),
+  );
 
   const aggregator = globalMetricsAggregators.get(client);
   if (aggregator) {
diff --git a/packages/core/test/lib/base.test.ts b/packages/core/test/lib/base.test.ts
index 8f3af775f095..6c7c8aa0d63d 100644
--- a/packages/core/test/lib/base.test.ts
+++ b/packages/core/test/lib/base.test.ts
@@ -1,19 +1,12 @@
 import type { Client, Envelope, Event } from '@sentry/types';
 import { SentryError, SyncPromise, dsnToString, logger } from '@sentry/utils';
 
-import {
-  Scope,
-  addBreadcrumb,
-  getCurrentScope,
-  getIsolationScope,
-  makeSession,
-  setCurrentClient,
-  setGlobalScope,
-} from '../../src';
+import { Scope, addBreadcrumb, getCurrentScope, getIsolationScope, makeSession, setCurrentClient } from '../../src';
 import * as integrationModule from '../../src/integration';
 import { TestClient, getDefaultTestClientOptions } from '../mocks/client';
 import { AdHocIntegration, TestIntegration } from '../mocks/integration';
 import { makeFakeTransport } from '../mocks/transport';
+import { clearGlobalScope } from './clear-global-scope';
 
 const PUBLIC_DSN = 'https://username@domain/123';
 // eslint-disable-next-line no-var
@@ -62,7 +55,7 @@ describe('BaseClient', () => {
   beforeEach(() => {
     TestClient.sendEventCalled = undefined;
     TestClient.instance = undefined;
-    setGlobalScope(undefined);
+    clearGlobalScope();
     getCurrentScope().clear();
     getCurrentScope().setClient(undefined);
     getIsolationScope().clear();
diff --git a/packages/core/test/lib/clear-global-scope.ts b/packages/core/test/lib/clear-global-scope.ts
new file mode 100644
index 000000000000..5290a610e961
--- /dev/null
+++ b/packages/core/test/lib/clear-global-scope.ts
@@ -0,0 +1,6 @@
+import { GLOBAL_OBJ } from '@sentry/utils';
+
+export function clearGlobalScope() {
+  const __SENTRY__ = (GLOBAL_OBJ.__SENTRY__ = GLOBAL_OBJ.__SENTRY__ || {});
+  __SENTRY__.globalScope = undefined;
+}
diff --git a/packages/core/test/lib/prepareEvent.test.ts b/packages/core/test/lib/prepareEvent.test.ts
index 1ad80fb5ce68..49dcc349f2ed 100644
--- a/packages/core/test/lib/prepareEvent.test.ts
+++ b/packages/core/test/lib/prepareEvent.test.ts
@@ -9,7 +9,7 @@ import type {
   ScopeContext,
 } from '@sentry/types';
 import { GLOBAL_OBJ, createStackParser } from '@sentry/utils';
-import { getGlobalScope, getIsolationScope, setGlobalScope } from '../../src';
+import { getGlobalScope, getIsolationScope } from '../../src';
 
 import { Scope } from '../../src/scope';
 import {
@@ -18,6 +18,7 @@ import {
   parseEventHintOrCaptureContext,
   prepareEvent,
 } from '../../src/utils/prepareEvent';
+import { clearGlobalScope } from './clear-global-scope';
 
 describe('applyDebugIds', () => {
   afterEach(() => {
@@ -191,7 +192,7 @@ describe('parseEventHintOrCaptureContext', () => {
 
 describe('prepareEvent', () => {
   beforeEach(() => {
-    setGlobalScope(undefined);
+    clearGlobalScope();
     getIsolationScope().clear();
   });
 
diff --git a/packages/core/test/lib/scope.test.ts b/packages/core/test/lib/scope.test.ts
index 9dee993efd33..978ebde52c9f 100644
--- a/packages/core/test/lib/scope.test.ts
+++ b/packages/core/test/lib/scope.test.ts
@@ -4,16 +4,16 @@ import {
   getCurrentScope,
   getGlobalScope,
   getIsolationScope,
-  setGlobalScope,
   withIsolationScope,
 } from '../../src';
 
 import { Scope } from '../../src/scope';
 import { TestClient, getDefaultTestClientOptions } from '../mocks/client';
+import { clearGlobalScope } from './clear-global-scope';
 
 describe('Scope', () => {
   beforeEach(() => {
-    setGlobalScope(undefined);
+    clearGlobalScope();
   });
 
   it('allows to create & update a scope', () => {
@@ -491,7 +491,7 @@ describe('Scope', () => {
 
   describe('global scope', () => {
     beforeEach(() => {
-      setGlobalScope(undefined);
+      clearGlobalScope();
     });
 
     it('works', () => {
diff --git a/packages/node-experimental/test/integration/scope.test.ts b/packages/node-experimental/test/integration/scope.test.ts
index 19848c4c78fc..cc8ca4d6b383 100644
--- a/packages/node-experimental/test/integration/scope.test.ts
+++ b/packages/node-experimental/test/integration/scope.test.ts
@@ -1,5 +1,6 @@
-import { getCurrentScope, setGlobalScope } from '@sentry/core';
+import { getCurrentScope } from '@sentry/core';
 import { getClient, getSpanScopes } from '@sentry/opentelemetry';
+import { clearGlobalScope } from '../../../core/test/lib/clear-global-scope';
 
 import * as Sentry from '../../src/';
 import type { NodeClient } from '../../src/sdk/client';
@@ -246,7 +247,7 @@ describe('Integration | Scope', () => {
 
   describe('global scope', () => {
     beforeEach(() => {
-      setGlobalScope(undefined);
+      clearGlobalScope();
     });
 
     it('works before calling init', () => {
diff --git a/packages/utils/src/worldwide.ts b/packages/utils/src/worldwide.ts
index a2fdfb67e14b..35350f67e9cd 100644
--- a/packages/utils/src/worldwide.ts
+++ b/packages/utils/src/worldwide.ts
@@ -12,7 +12,7 @@
 
 /* eslint-disable @typescript-eslint/no-explicit-any */
 
-import type { Integration } from '@sentry/types';
+import type { Client, Integration, MetricsAggregator, Scope } from '@sentry/types';
 
 import type { SdkSource } from './env';
 
@@ -54,6 +54,8 @@ export interface InternalGlobal {
       // eslint-disable-next-line @typescript-eslint/ban-types
       [key: string]: Function;
     };
+    globalScope: Scope | undefined;
+    globalMetricsAggregators: WeakMap<Client, MetricsAggregator> | undefined;
   };
   /**
    * Raw module metadata that is injected by bundler plugins.