diff --git a/.changeset/nice-pants-shave.md b/.changeset/nice-pants-shave.md
new file mode 100644
index 0000000000..500888a817
--- /dev/null
+++ b/.changeset/nice-pants-shave.md
@@ -0,0 +1,8 @@
+---
+'@backstage/plugin-auth-backend-module-cloudflare-access-provider': patch
+'@backstage/plugin-scaffolder-backend-module-sentry': patch
+'@backstage/plugin-scaffolder-backend-module-gitea': patch
+'@backstage/plugin-notifications-node': patch
+---
+
+Use `node-fetch` instead of native fetch, as per https://backstage.io/docs/architecture-decisions/adrs-adr013
diff --git a/plugins/auth-backend-module-cloudflare-access-provider/src/helpers.ts b/plugins/auth-backend-module-cloudflare-access-provider/src/helpers.ts
index 60411e53d5..c1a14ae6b4 100644
--- a/plugins/auth-backend-module-cloudflare-access-provider/src/helpers.ts
+++ b/plugins/auth-backend-module-cloudflare-access-provider/src/helpers.ts
@@ -23,6 +23,7 @@ import {
 } from '@backstage/errors';
 import express from 'express';
 import { createRemoteJWKSet, jwtVerify } from 'jose';
+import fetch, { Headers } from 'node-fetch';
 import {
   CACHE_PREFIX,
   CF_JWT_HEADER,
diff --git a/plugins/notifications-node/package.json b/plugins/notifications-node/package.json
index 1f3760f5c6..2500026f3b 100644
--- a/plugins/notifications-node/package.json
+++ b/plugins/notifications-node/package.json
@@ -37,6 +37,7 @@
     "@backstage/plugin-notifications-common": "workspace:^",
     "@backstage/plugin-signals-node": "workspace:^",
     "knex": "^3.0.0",
+    "node-fetch": "^2.6.7",
     "uuid": "^9.0.0"
   },
   "devDependencies": {
diff --git a/plugins/notifications-node/src/service/DefaultNotificationService.test.ts b/plugins/notifications-node/src/service/DefaultNotificationService.test.ts
index 4711f3de18..d5c327e788 100644
--- a/plugins/notifications-node/src/service/DefaultNotificationService.test.ts
+++ b/plugins/notifications-node/src/service/DefaultNotificationService.test.ts
@@ -24,8 +24,6 @@ import {
 } from './DefaultNotificationService';
 import { mockCredentials, mockServices } from '@backstage/backend-test-utils';
 
-const server = setupServer();
-
 const testNotification: NotificationPayload = {
   title: 'Notification 1',
   link: '/catalog',
@@ -33,8 +31,12 @@ const testNotification: NotificationPayload = {
 };
 
 describe('DefaultNotificationService', () => {
+  const server = setupServer();
   setupRequestMockHandlers(server);
-  const discovery = mockServices.discovery();
+
+  const discovery = mockServices.discovery.mock({
+    getBaseUrl: jest.fn().mockResolvedValue('http://example.com'),
+  });
   const auth = mockServices.auth();
 
   let service: DefaultNotificationService;
@@ -53,20 +55,17 @@ describe('DefaultNotificationService', () => {
       };
 
       server.use(
-        rest.post(
-          `${await discovery.getBaseUrl('notifications')}/`,
-          async (req, res, ctx) => {
-            const json = await req.json();
-            expect(json).toEqual(body);
-            expect(req.headers.get('Authorization')).toBe(
-              mockCredentials.service.header({
-                onBehalfOf: await auth.getOwnServiceCredentials(),
-                targetPluginId: 'notifications',
-              }),
-            );
-            return res(ctx.status(200));
-          },
-        ),
+        rest.post('http://example.com', async (req, res, ctx) => {
+          const json = await req.json();
+          expect(json).toEqual(body);
+          expect(req.headers.get('Authorization')).toBe(
+            mockCredentials.service.header({
+              onBehalfOf: await auth.getOwnServiceCredentials(),
+              targetPluginId: 'notifications',
+            }),
+          );
+          return res(ctx.status(200));
+        }),
       );
       await expect(service.send(body)).resolves.toBeUndefined();
     });
@@ -78,20 +77,17 @@ describe('DefaultNotificationService', () => {
       };
 
       server.use(
-        rest.post(
-          `${await discovery.getBaseUrl('notifications')}/`,
-          async (req, res, ctx) => {
-            const json = await req.json();
-            expect(json).toEqual(body);
-            expect(req.headers.get('Authorization')).toBe(
-              mockCredentials.service.header({
-                onBehalfOf: await auth.getOwnServiceCredentials(),
-                targetPluginId: 'notifications',
-              }),
-            );
-            return res(ctx.status(400));
-          },
-        ),
+        rest.post('http://example.com', async (req, res, ctx) => {
+          const json = await req.json();
+          expect(json).toEqual(body);
+          expect(req.headers.get('Authorization')).toBe(
+            mockCredentials.service.header({
+              onBehalfOf: await auth.getOwnServiceCredentials(),
+              targetPluginId: 'notifications',
+            }),
+          );
+          return res(ctx.status(400));
+        }),
       );
       await expect(service.send(body)).rejects.toThrow(
         'Request failed with status 400',
diff --git a/plugins/notifications-node/src/service/DefaultNotificationService.ts b/plugins/notifications-node/src/service/DefaultNotificationService.ts
index 950f42ae83..7a46e01689 100644
--- a/plugins/notifications-node/src/service/DefaultNotificationService.ts
+++ b/plugins/notifications-node/src/service/DefaultNotificationService.ts
@@ -17,6 +17,7 @@
 import { NotificationService } from './NotificationService';
 import { AuthService, DiscoveryService } from '@backstage/backend-plugin-api';
 import { NotificationPayload } from '@backstage/plugin-notifications-common';
+import fetch from 'node-fetch';
 
 /** @public */
 export type NotificationServiceOptions = {
@@ -68,7 +69,7 @@ export class DefaultNotificationService implements NotificationService {
         targetPluginId: 'notifications',
       });
 
-      const response = await fetch(`${baseUrl}/`, {
+      const response = await fetch(baseUrl, {
         method: 'POST',
         body: JSON.stringify(notification),
         headers: {
diff --git a/plugins/scaffolder-backend-module-gitea/src/actions/gitea.ts b/plugins/scaffolder-backend-module-gitea/src/actions/gitea.ts
index 6b29ff2a4c..601a670237 100644
--- a/plugins/scaffolder-backend-module-gitea/src/actions/gitea.ts
+++ b/plugins/scaffolder-backend-module-gitea/src/actions/gitea.ts
@@ -30,6 +30,7 @@ import {
 } from '@backstage/plugin-scaffolder-node';
 import { examples } from './gitea.examples';
 import crypto from 'crypto';
+import fetch, { Response, RequestInit } from 'node-fetch';
 
 const checkGiteaContentUrl = async (
   config: GiteaIntegrationConfig,
diff --git a/plugins/scaffolder-backend-module-sentry/package.json b/plugins/scaffolder-backend-module-sentry/package.json
index a44de6705a..861e78b565 100644
--- a/plugins/scaffolder-backend-module-sentry/package.json
+++ b/plugins/scaffolder-backend-module-sentry/package.json
@@ -44,6 +44,7 @@
     "@backstage/config": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@backstage/plugin-scaffolder-node": "workspace:^",
+    "node-fetch": "^2.6.7",
     "yaml": "^2.3.3"
   },
   "devDependencies": {
diff --git a/plugins/scaffolder-backend-module-sentry/src/actions/createProject.ts b/plugins/scaffolder-backend-module-sentry/src/actions/createProject.ts
index 259b670f9e..686053b178 100644
--- a/plugins/scaffolder-backend-module-sentry/src/actions/createProject.ts
+++ b/plugins/scaffolder-backend-module-sentry/src/actions/createProject.ts
@@ -17,6 +17,7 @@
 import { createTemplateAction } from '@backstage/plugin-scaffolder-node';
 import { InputError } from '@backstage/errors';
 import { Config } from '@backstage/config';
+import fetch from 'node-fetch';
 
 /**
  * Creates the `sentry:project:create` Scaffolder action.
diff --git a/yarn.lock b/yarn.lock
index fde9aa7d1f..214d43ecfe 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6259,6 +6259,7 @@ __metadata:
     "@backstage/test-utils": "workspace:^"
     knex: ^3.0.0
     msw: ^1.0.0
+    node-fetch: ^2.6.7
     uuid: ^9.0.0
   languageName: unknown
   linkType: soft
@@ -6751,6 +6752,7 @@ __metadata:
     "@backstage/plugin-scaffolder-node-test-utils": "workspace:^"
     "@backstage/types": "workspace:^"
     msw: ^2.0.0
+    node-fetch: ^2.6.7
     yaml: ^2.3.3
   languageName: unknown
   linkType: soft