diff --git a/MIGRATION.md b/MIGRATION.md
index 95aa940265f3..302aa1e52ec1 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -8,6 +8,15 @@ npx @sentry/migr8@latest
 
 This will let you select which updates to run, and automatically update your code. Make sure to still review all code changes!
 
+## Changed integration interface
+
+In v8, integrations passed to a client will have an optional `setupOnce()` hook.
+Currently, this hook is always present, but in v8 you will not be able to rely on this always existing anymore -
+any integration _may_ have a `setup` and/or a `setupOnce` hook. Additionally, `setupOnce()` will not receive any arguments anymore.
+
+This should not affect most people, but in the case that you are manually calling `integration.setupOnce()` right now,
+make sure to guard it's existence properly.
+
 ## Deprecate `Hub`
 
 The `Hub` has been a very important part of the Sentry SDK API up until now.
diff --git a/packages/browser/src/integrations/breadcrumbs.ts b/packages/browser/src/integrations/breadcrumbs.ts
index 831059e97756..9799e6e73b4f 100644
--- a/packages/browser/src/integrations/breadcrumbs.ts
+++ b/packages/browser/src/integrations/breadcrumbs.ts
@@ -68,6 +68,8 @@ const breadcrumbsIntegration: IntegrationFn = (options: Partial<BreadcrumbsOptio
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       if (_options.console) {
         addConsoleInstrumentationHandler(_getConsoleBreadcrumbHandler(client));
diff --git a/packages/browser/src/integrations/dedupe.ts b/packages/browser/src/integrations/dedupe.ts
index 8882f81ae701..a74a4b9ed9c6 100644
--- a/packages/browser/src/integrations/dedupe.ts
+++ b/packages/browser/src/integrations/dedupe.ts
@@ -11,6 +11,8 @@ const dedupeIntegration: IntegrationFn = () => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(currentEvent) {
       // We want to ignore any non-error type events, e.g. transactions or replays
       // These should never be deduped, and also not be compared against as _previousEvent.
diff --git a/packages/browser/src/integrations/httpcontext.ts b/packages/browser/src/integrations/httpcontext.ts
index 2347c7cb1971..d46f29257306 100644
--- a/packages/browser/src/integrations/httpcontext.ts
+++ b/packages/browser/src/integrations/httpcontext.ts
@@ -8,6 +8,8 @@ const INTEGRATION_NAME = 'HttpContext';
 const httpContextIntegration: IntegrationFn = () => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     preprocessEvent(event) {
       // if none of the information we want exists, don't bother
       if (!WINDOW.navigator && !WINDOW.location && !WINDOW.document) {
diff --git a/packages/browser/src/integrations/linkederrors.ts b/packages/browser/src/integrations/linkederrors.ts
index e74e6252a4ce..bb351bcdc3c6 100644
--- a/packages/browser/src/integrations/linkederrors.ts
+++ b/packages/browser/src/integrations/linkederrors.ts
@@ -19,6 +19,8 @@ const linkedErrorsIntegration: IntegrationFn = (options: LinkedErrorsOptions = {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     preprocessEvent(event, hint, client) {
       const options = client.getOptions();
 
diff --git a/packages/browser/src/profiling/integration.ts b/packages/browser/src/profiling/integration.ts
index b50c60552a7f..c6e478e8554d 100644
--- a/packages/browser/src/profiling/integration.ts
+++ b/packages/browser/src/profiling/integration.ts
@@ -21,6 +21,8 @@ const INTEGRATION_NAME = 'BrowserProfiling';
 const browserProfilingIntegration: IntegrationFn = () => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       const scope = getCurrentScope();
 
diff --git a/packages/core/src/integration.ts b/packages/core/src/integration.ts
index 16b0c145b0b4..4b4a3177c428 100644
--- a/packages/core/src/integration.ts
+++ b/packages/core/src/integration.ts
@@ -1,4 +1,4 @@
-import type { Client, Event, EventHint, EventProcessor, Hub, Integration, IntegrationFn, Options } from '@sentry/types';
+import type { Client, Event, EventHint, Integration, IntegrationFn, Options } from '@sentry/types';
 import { arrayify, logger } from '@sentry/utils';
 
 import { DEBUG_BUILD } from './debug-build';
@@ -171,26 +171,16 @@ export function convertIntegrationFnToClass<Fn extends IntegrationFn>(
   fn: Fn,
 ): Integration & {
   id: string;
-  new (...args: Parameters<Fn>): Integration &
-    ReturnType<Fn> & {
-      setupOnce: (addGlobalEventProcessor?: (callback: EventProcessor) => void, getCurrentHub?: () => Hub) => void;
-    };
+  new (...args: Parameters<Fn>): Integration & ReturnType<Fn>;
 } {
   return Object.assign(
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     function ConvertedIntegration(...rest: Parameters<Fn>) {
-      return {
-        // eslint-disable-next-line @typescript-eslint/no-empty-function
-        setupOnce: () => {},
-        ...fn(...rest),
-      };
+      return fn(...rest);
     },
     { id: name },
   ) as unknown as Integration & {
     id: string;
-    new (...args: Parameters<Fn>): Integration &
-      ReturnType<Fn> & {
-        setupOnce: (addGlobalEventProcessor?: (callback: EventProcessor) => void, getCurrentHub?: () => Hub) => void;
-      };
+    new (...args: Parameters<Fn>): Integration & ReturnType<Fn>;
   };
 }
diff --git a/packages/core/src/integrations/inboundfilters.ts b/packages/core/src/integrations/inboundfilters.ts
index 57c0387b25e4..6d2ec6dfc799 100644
--- a/packages/core/src/integrations/inboundfilters.ts
+++ b/packages/core/src/integrations/inboundfilters.ts
@@ -33,6 +33,8 @@ const INTEGRATION_NAME = 'InboundFilters';
 const inboundFiltersIntegration: IntegrationFn = (options: Partial<InboundFiltersOptions>) => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event, _hint, client) {
       const clientOptions = client.getOptions();
       const mergedOptions = _mergeOptions(options, clientOptions);
diff --git a/packages/core/src/integrations/linkederrors.ts b/packages/core/src/integrations/linkederrors.ts
index aa9df808e2d8..25e6417023f2 100644
--- a/packages/core/src/integrations/linkederrors.ts
+++ b/packages/core/src/integrations/linkederrors.ts
@@ -18,6 +18,8 @@ const linkedErrorsIntegration: IntegrationFn = (options: LinkedErrorsOptions = {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     preprocessEvent(event, hint, client) {
       const options = client.getOptions();
 
diff --git a/packages/core/src/integrations/metadata.ts b/packages/core/src/integrations/metadata.ts
index e89cffbc8a0a..a18fc5dffebc 100644
--- a/packages/core/src/integrations/metadata.ts
+++ b/packages/core/src/integrations/metadata.ts
@@ -9,6 +9,8 @@ const INTEGRATION_NAME = 'ModuleMetadata';
 const moduleMetadataIntegration: IntegrationFn = () => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       if (typeof client.on !== 'function') {
         return;
diff --git a/packages/core/src/integrations/requestdata.ts b/packages/core/src/integrations/requestdata.ts
index 1deab79df241..76d29b4751b7 100644
--- a/packages/core/src/integrations/requestdata.ts
+++ b/packages/core/src/integrations/requestdata.ts
@@ -71,7 +71,8 @@ const requestDataIntegration: IntegrationFn = (options: RequestDataIntegrationOp
 
   return {
     name: INTEGRATION_NAME,
-
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event, _hint, client) {
       // Note: In the long run, most of the logic here should probably move into the request data utility functions. For
       // the moment it lives here, though, until https://github.com/getsentry/sentry-javascript/issues/5718 is addressed.
diff --git a/packages/core/src/metrics/integration.ts b/packages/core/src/metrics/integration.ts
index 531b0aa698b2..5cadf47ce3f2 100644
--- a/packages/core/src/metrics/integration.ts
+++ b/packages/core/src/metrics/integration.ts
@@ -8,6 +8,8 @@ const INTEGRATION_NAME = 'MetricsAggregator';
 const metricsAggregatorIntegration: IntegrationFn = () => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client: BaseClient<ClientOptions>) {
       client.metricsAggregator = new BrowserMetricsAggregator(client);
     },
diff --git a/packages/core/test/lib/integration.test.ts b/packages/core/test/lib/integration.test.ts
index 19e22773b59b..829ef4de991b 100644
--- a/packages/core/test/lib/integration.test.ts
+++ b/packages/core/test/lib/integration.test.ts
@@ -649,7 +649,10 @@ describe('addIntegration', () => {
 describe('convertIntegrationFnToClass', () => {
   /* eslint-disable deprecation/deprecation */
   it('works with a minimal integration', () => {
-    const integrationFn = () => ({ name: 'testName' });
+    const integrationFn = () => ({
+      name: 'testName',
+      setupOnce: () => {},
+    });
 
     const IntegrationClass = convertIntegrationFnToClass('testName', integrationFn);
 
@@ -663,7 +666,10 @@ describe('convertIntegrationFnToClass', () => {
   });
 
   it('works with options', () => {
-    const integrationFn = (_options: { num: number }) => ({ name: 'testName' });
+    const integrationFn = (_options: { num: number }) => ({
+      name: 'testName',
+      setupOnce: () => {},
+    });
 
     const IntegrationClass = convertIntegrationFnToClass('testName', integrationFn);
 
diff --git a/packages/deno/src/integrations/context.ts b/packages/deno/src/integrations/context.ts
index e54f4ec21a87..426d296f6efc 100644
--- a/packages/deno/src/integrations/context.ts
+++ b/packages/deno/src/integrations/context.ts
@@ -55,6 +55,8 @@ async function addDenoRuntimeContext(event: Event): Promise<Event> {
 const denoContextIntegration: IntegrationFn = () => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       return addDenoRuntimeContext(event);
     },
diff --git a/packages/deno/src/integrations/contextlines.ts b/packages/deno/src/integrations/contextlines.ts
index 38fe0efd3433..f3099151908a 100644
--- a/packages/deno/src/integrations/contextlines.ts
+++ b/packages/deno/src/integrations/contextlines.ts
@@ -52,6 +52,8 @@ const denoContextLinesIntegration: IntegrationFn = (options: ContextLinesOptions
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       return addSourceContext(event, contextLines);
     },
diff --git a/packages/deno/src/integrations/globalhandlers.ts b/packages/deno/src/integrations/globalhandlers.ts
index 06194037b6d1..05b46b58c7a9 100644
--- a/packages/deno/src/integrations/globalhandlers.ts
+++ b/packages/deno/src/integrations/globalhandlers.ts
@@ -22,6 +22,8 @@ const globalHandlersIntegration: IntegrationFn = (options?: GlobalHandlersIntegr
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       if (_options.error) {
         installGlobalErrorHandler(client);
diff --git a/packages/deno/src/integrations/normalizepaths.ts b/packages/deno/src/integrations/normalizepaths.ts
index a8143c8b078b..39a3bab5a1c5 100644
--- a/packages/deno/src/integrations/normalizepaths.ts
+++ b/packages/deno/src/integrations/normalizepaths.ts
@@ -69,6 +69,8 @@ const normalizePathsIntegration: IntegrationFn = () => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       // This error.stack hopefully contains paths that traverse the app cwd
       const error = new Error();
diff --git a/packages/integrations/src/captureconsole.ts b/packages/integrations/src/captureconsole.ts
index 4f37ecb1011a..4d9aa04ce116 100644
--- a/packages/integrations/src/captureconsole.ts
+++ b/packages/integrations/src/captureconsole.ts
@@ -20,6 +20,8 @@ const captureConsoleIntegration = ((options: CaptureConsoleOptions = {}) => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       if (!('console' in GLOBAL_OBJ)) {
         return;
diff --git a/packages/integrations/src/contextlines.ts b/packages/integrations/src/contextlines.ts
index 656080ec3182..143fb0232bec 100644
--- a/packages/integrations/src/contextlines.ts
+++ b/packages/integrations/src/contextlines.ts
@@ -23,6 +23,8 @@ const contextLinesIntegration: IntegrationFn = (options: ContextLinesOptions = {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       return addSourceContext(event, contextLines);
     },
diff --git a/packages/integrations/src/debug.ts b/packages/integrations/src/debug.ts
index 6edb9939269a..8e20ce7f9dfc 100644
--- a/packages/integrations/src/debug.ts
+++ b/packages/integrations/src/debug.ts
@@ -20,6 +20,8 @@ const debugIntegration = ((options: DebugOptions = {}) => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       if (!client.on) {
         return;
diff --git a/packages/integrations/src/dedupe.ts b/packages/integrations/src/dedupe.ts
index 1e3ae1be7626..97a47193b19a 100644
--- a/packages/integrations/src/dedupe.ts
+++ b/packages/integrations/src/dedupe.ts
@@ -11,6 +11,8 @@ const dedupeIntegration = (() => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(currentEvent) {
       // We want to ignore any non-error type events, e.g. transactions or replays
       // These should never be deduped, and also not be compared against as _previousEvent.
diff --git a/packages/integrations/src/extraerrordata.ts b/packages/integrations/src/extraerrordata.ts
index 8d9d72cb81d7..6b340a1283bc 100644
--- a/packages/integrations/src/extraerrordata.ts
+++ b/packages/integrations/src/extraerrordata.ts
@@ -28,6 +28,8 @@ const extraErrorDataIntegration = ((options: Partial<ExtraErrorDataOptions> = {}
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event, hint) {
       return _enhanceEventWithErrorData(event, hint, depth, captureErrorCause);
     },
diff --git a/packages/integrations/src/httpclient.ts b/packages/integrations/src/httpclient.ts
index 74142487473a..0ef2dcca3f27 100644
--- a/packages/integrations/src/httpclient.ts
+++ b/packages/integrations/src/httpclient.ts
@@ -47,6 +47,8 @@ const httpClientIntegration = ((options: Partial<HttpClientOptions> = {}) => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client): void {
       _wrapFetch(client, _options);
       _wrapXHR(client, _options);
diff --git a/packages/integrations/src/rewriteframes.ts b/packages/integrations/src/rewriteframes.ts
index d82bde5728c6..7bb5957607b2 100644
--- a/packages/integrations/src/rewriteframes.ts
+++ b/packages/integrations/src/rewriteframes.ts
@@ -69,6 +69,8 @@ const rewriteFramesIntegration = ((options: RewriteFramesOptions = {}) => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(originalEvent) {
       let processedEvent = originalEvent;
 
diff --git a/packages/integrations/src/sessiontiming.ts b/packages/integrations/src/sessiontiming.ts
index 4398d170a981..b3511e6c3527 100644
--- a/packages/integrations/src/sessiontiming.ts
+++ b/packages/integrations/src/sessiontiming.ts
@@ -8,6 +8,8 @@ const sessionTimingIntegration = (() => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       const now = Date.now();
 
diff --git a/packages/integrations/src/transaction.ts b/packages/integrations/src/transaction.ts
index c44c94c7fe06..a7e5aa5a1745 100644
--- a/packages/integrations/src/transaction.ts
+++ b/packages/integrations/src/transaction.ts
@@ -6,6 +6,8 @@ const INTEGRATION_NAME = 'Transaction';
 const transactionIntegration = (() => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       const frames = _getFramesFromEvent(event);
 
diff --git a/packages/node/src/integrations/anr/index.ts b/packages/node/src/integrations/anr/index.ts
index 549e483b51d0..1ebca2fdff57 100644
--- a/packages/node/src/integrations/anr/index.ts
+++ b/packages/node/src/integrations/anr/index.ts
@@ -55,6 +55,8 @@ const INTEGRATION_NAME = 'Anr';
 const anrIntegration = ((options: Partial<Options> = {}) => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client: NodeClient) {
       if (NODE_VERSION.major < 16 || (NODE_VERSION.major === 16 && NODE_VERSION.minor < 17)) {
         throw new Error('ANR detection requires Node 16.17.0 or later');
diff --git a/packages/node/src/integrations/console.ts b/packages/node/src/integrations/console.ts
index d0243d7e3985..eb46b58adf74 100644
--- a/packages/node/src/integrations/console.ts
+++ b/packages/node/src/integrations/console.ts
@@ -8,6 +8,8 @@ const INTEGRATION_NAME = 'Console';
 const consoleIntegration = (() => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       addConsoleInstrumentationHandler(({ args, level }) => {
         if (getClient() !== client) {
diff --git a/packages/node/src/integrations/context.ts b/packages/node/src/integrations/context.ts
index 2b16ec6a4527..461f85297e4b 100644
--- a/packages/node/src/integrations/context.ts
+++ b/packages/node/src/integrations/context.ts
@@ -98,6 +98,8 @@ const contextIntegration = ((options: ContextOptions = {}) => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       return addContext(event);
     },
diff --git a/packages/node/src/integrations/contextlines.ts b/packages/node/src/integrations/contextlines.ts
index 0a961ddbc259..4f7ab81f063e 100644
--- a/packages/node/src/integrations/contextlines.ts
+++ b/packages/node/src/integrations/contextlines.ts
@@ -40,6 +40,8 @@ const contextLinesIntegration = ((options: ContextLinesOptions = {}) => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       return addSourceContext(event, contextLines);
     },
diff --git a/packages/node/src/integrations/local-variables/local-variables-async.ts b/packages/node/src/integrations/local-variables/local-variables-async.ts
index c3072c6c3f11..360d553e48a2 100644
--- a/packages/node/src/integrations/local-variables/local-variables-async.ts
+++ b/packages/node/src/integrations/local-variables/local-variables-async.ts
@@ -214,6 +214,8 @@ export const localVariablesAsync: IntegrationFn = (options: Options = {}) => {
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client: NodeClient) {
       const clientOptions = client.getOptions();
 
diff --git a/packages/node/src/integrations/local-variables/local-variables-sync.ts b/packages/node/src/integrations/local-variables/local-variables-sync.ts
index 32dae4599c02..45d17748ec78 100644
--- a/packages/node/src/integrations/local-variables/local-variables-sync.ts
+++ b/packages/node/src/integrations/local-variables/local-variables-sync.ts
@@ -326,6 +326,8 @@ export const localVariablesSync: IntegrationFn = (
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client: NodeClient) {
       const clientOptions = client.getOptions();
 
diff --git a/packages/node/src/integrations/modules.ts b/packages/node/src/integrations/modules.ts
index ad6549dd3b3b..85bb792f60b2 100644
--- a/packages/node/src/integrations/modules.ts
+++ b/packages/node/src/integrations/modules.ts
@@ -79,6 +79,8 @@ function _getModules(): { [key: string]: string } {
 const modulesIntegration = (() => {
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     processEvent(event) {
       event.modules = {
         ...event.modules,
diff --git a/packages/node/src/integrations/onuncaughtexception.ts b/packages/node/src/integrations/onuncaughtexception.ts
index e9c724f89e7f..bdee16d3e953 100644
--- a/packages/node/src/integrations/onuncaughtexception.ts
+++ b/packages/node/src/integrations/onuncaughtexception.ts
@@ -48,6 +48,8 @@ const onUncaughtExceptionIntegration = ((options: Partial<OnUncaughtExceptionOpt
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client: NodeClient) {
       global.process.on('uncaughtException', makeErrorHandler(client, _options));
     },
diff --git a/packages/node/src/integrations/onunhandledrejection.ts b/packages/node/src/integrations/onunhandledrejection.ts
index 85caecf9cafc..2820f8789065 100644
--- a/packages/node/src/integrations/onunhandledrejection.ts
+++ b/packages/node/src/integrations/onunhandledrejection.ts
@@ -21,6 +21,8 @@ const onUnhandledRejectionIntegration = ((options: Partial<OnUnhandledRejectionO
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       global.process.on('unhandledRejection', makeUnhandledPromiseHandler(client, { mode }));
     },
diff --git a/packages/node/src/integrations/spotlight.ts b/packages/node/src/integrations/spotlight.ts
index 10afd2245e9a..a248810cb2f6 100644
--- a/packages/node/src/integrations/spotlight.ts
+++ b/packages/node/src/integrations/spotlight.ts
@@ -21,6 +21,8 @@ const spotlightIntegration = ((options: Partial<SpotlightConnectionOptions> = {}
 
   return {
     name: INTEGRATION_NAME,
+    // TODO v8: Remove this
+    setupOnce() {}, // eslint-disable-line @typescript-eslint/no-empty-function
     setup(client) {
       if (typeof process === 'object' && process.env && process.env.NODE_ENV !== 'development') {
         logger.warn("[Spotlight] It seems you're not in dev mode. Do you really want to have Spotlight enabled?");
diff --git a/packages/types/src/integration.ts b/packages/types/src/integration.ts
index a4108a60c749..44c49ab375aa 100644
--- a/packages/types/src/integration.ts
+++ b/packages/types/src/integration.ts
@@ -13,12 +13,8 @@ export interface IntegrationClass<T> {
   new (...args: any[]): T;
 }
 
-/**
- * An integration in function form.
- * This is expected to return an integration result,
- */
-export type IntegrationFn = (...rest: any[]) => IntegrationFnResult;
-
+/** Integration interface.
+ * This is more or less the same as `Integration`, but with a slimmer `setupOnce` siganture. */
 export interface IntegrationFnResult {
   /**
    * The name of the integration.
@@ -28,8 +24,10 @@ export interface IntegrationFnResult {
   /**
    * This hook is only called once, even if multiple clients are created.
    * It does not receives any arguments, and should only use for e.g. global monkey patching and similar things.
+   *
+   * NOTE: In v8, this will become optional.
    */
-  setupOnce?(): void;
+  setupOnce(): void;
 
   /**
    * Set up an integration for the given client.
@@ -54,16 +52,24 @@ export interface IntegrationFnResult {
   processEvent?(event: Event, hint: EventHint, client: Client): Event | null | PromiseLike<Event | null>;
 }
 
+/**
+ * An integration in function form.
+ * This is expected to return an integration.
+ */
+export type IntegrationFn = (...rest: any[]) => IntegrationFnResult;
+
 /** Integration interface */
 export interface Integration {
   /**
-   * Returns {@link IntegrationClass.id}
+   * The name of the integration.
    */
   name: string;
 
   /**
-   * Sets the integration up only once.
-   * This takes no options on purpose, options should be passed in the constructor
+   * This hook is only called once, even if multiple clients are created.
+   * It does not receives any arguments, and should only use for e.g. global monkey patching and similar things.
+   *
+   * NOTE: In v8, this will become optional, and not receive any arguments anymore.
    */
   setupOnce(addGlobalEventProcessor: (callback: EventProcessor) => void, getCurrentHub: () => Hub): void;