diff --git a/examples/reproduction-template/package.json b/examples/reproduction-template/package.json
index e46540ae538d74..c8f51d82ac2fb4 100644
--- a/examples/reproduction-template/package.json
+++ b/examples/reproduction-template/package.json
@@ -7,8 +7,8 @@
   },
   "dependencies": {
     "next": "canary",
-    "react": "19.0.0-rc-7771d3a7-20240827",
-    "react-dom": "19.0.0-rc-7771d3a7-20240827"
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   },
   "devDependencies": {
     "@types/node": "20.12.12",
diff --git a/package.json b/package.json
index 1402a0e080b8e8..0e2fb1518b5588 100644
--- a/package.json
+++ b/package.json
@@ -206,10 +206,10 @@
     "pretty-bytes": "5.3.0",
     "pretty-ms": "7.0.0",
     "random-seed": "0.3.0",
-    "react": "19.0.0-rc-7771d3a7-20240827",
+    "react": "18.3.1",
     "react-17": "npm:react@17.0.2",
     "react-builtin": "npm:react@19.0.0-rc-7771d3a7-20240827",
-    "react-dom": "19.0.0-rc-7771d3a7-20240827",
+    "react-dom": "18.3.1",
     "react-dom-17": "npm:react-dom@17.0.2",
     "react-dom-builtin": "npm:react-dom@19.0.0-rc-7771d3a7-20240827",
     "react-dom-experimental-builtin": "npm:react-dom@0.0.0-experimental-7771d3a7-20240827",
@@ -269,10 +269,10 @@
       "@babel/traverse": "7.22.5",
       "@types/react": "npm:types-react@19.0.0-rc.0",
       "@types/react-dom": "npm:types-react-dom@19.0.0-rc.0",
-      "react": "19.0.0-rc-7771d3a7-20240827",
-      "react-dom": "19.0.0-rc-7771d3a7-20240827",
-      "react-is": "19.0.0-rc-7771d3a7-20240827",
-      "scheduler": "0.25.0-rc-7771d3a7-20240827"
+      "react": "18.3.1",
+      "react-dom": "18.3.1",
+      "react-is": "18.3.1",
+      "scheduler": "0.23.2"
     },
     "patchedDependencies": {
       "webpack-sources@3.2.3": "patches/webpack-sources@3.2.3.patch"
diff --git a/packages/create-next-app/templates/index.ts b/packages/create-next-app/templates/index.ts
index 8c6e59a5e94ef4..2dfe1bce666f68 100644
--- a/packages/create-next-app/templates/index.ts
+++ b/packages/create-next-app/templates/index.ts
@@ -13,7 +13,7 @@ import { GetTemplateFileArgs, InstallTemplateArgs } from "./types";
 
 // Do not rename or format. sync-react script relies on this line.
 // prettier-ignore
-const nextjsReactPeerVersion = "19.0.0-rc-7771d3a7-20240827";
+const nextjsReactPeerVersion = "^18.2.0";
 
 /**
  * Get the file path for a given file in a template, e.g. "next.config.js".
diff --git a/packages/next/package.json b/packages/next/package.json
index 729c1eabe7d6bd..dbc81affecab0e 100644
--- a/packages/next/package.json
+++ b/packages/next/package.json
@@ -108,8 +108,8 @@
     "@opentelemetry/api": "^1.1.0",
     "@playwright/test": "^1.41.2",
     "babel-plugin-react-compiler": "*",
-    "react": "19.0.0-rc-7771d3a7-20240827",
-    "react-dom": "19.0.0-rc-7771d3a7-20240827",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
     "sass": "^1.3.0"
   },
   "peerDependenciesMeta": {
diff --git a/packages/next/src/build/webpack-config.ts b/packages/next/src/build/webpack-config.ts
index 9b12bf14ce0bb9..7d8d39e6a59865 100644
--- a/packages/next/src/build/webpack-config.ts
+++ b/packages/next/src/build/webpack-config.ts
@@ -107,8 +107,8 @@ const NEXT_PROJECT_ROOT_DIST_CLIENT = path.join(
   'client'
 )
 
-if (parseInt(React.version) < 19) {
-  throw new Error('Next.js requires react >= 19.0.0 to be installed.')
+if (parseInt(React.version) !== 18) {
+  throw new Error('Next.js requires react@^18.2.0 to be installed.')
 }
 
 export const babelIncludeRegexes: RegExp[] = [
diff --git a/packages/next/src/client/components/react-dev-overlay/internal/container/Errors.tsx b/packages/next/src/client/components/react-dev-overlay/internal/container/Errors.tsx
index 38587213a6f595..74df140a255c3f 100644
--- a/packages/next/src/client/components/react-dev-overlay/internal/container/Errors.tsx
+++ b/packages/next/src/client/components/react-dev-overlay/internal/container/Errors.tsx
@@ -238,7 +238,6 @@ export function Errors({
   )
 
   const errorDetails: HydrationErrorState = (error as any).details || {}
-  const notes = errorDetails.notes || ''
   const [warningTemplate, serverContent, clientContent] =
     errorDetails.warning || [null, '', '']
 
@@ -252,6 +251,7 @@ export function Errors({
         .replace(/^Warning: /, '')
         .replace(/^Error: /, '')
     : null
+  const notes = isAppDir ? errorDetails.notes || '' : hydrationWarning
 
   return (
     <Overlay>
@@ -307,7 +307,9 @@ export function Errors({
               {/* If there's hydration warning, skip displaying the error name */}
               {hydrationWarning ? '' : error.name + ': '}
               <HotlinkedText
-                text={hydrationWarning || error.message}
+                text={
+                  isAppDir ? hydrationWarning || error.message : error.message
+                }
                 matcher={isNextjsLink}
               />
             </p>
diff --git a/packages/next/src/client/components/react-dev-overlay/internal/container/RuntimeError/component-stack-pseudo-html.tsx b/packages/next/src/client/components/react-dev-overlay/internal/container/RuntimeError/component-stack-pseudo-html.tsx
index 6b2c858d6f3466..58b2e2d199665e 100644
--- a/packages/next/src/client/components/react-dev-overlay/internal/container/RuntimeError/component-stack-pseudo-html.tsx
+++ b/packages/next/src/client/components/react-dev-overlay/internal/container/RuntimeError/component-stack-pseudo-html.tsx
@@ -66,7 +66,7 @@ export function PseudoHtmlDiff({
   firstContent: string
   secondContent: string
   reactOutputComponentDiff: string | undefined
-  hydrationMismatchType: 'tag' | 'text'
+  hydrationMismatchType: 'tag' | 'text' | 'text-in-tag'
 } & React.HTMLAttributes<HTMLPreElement>) {
   const isHtmlTagsWarning = hydrationMismatchType === 'tag'
   const isReactHydrationDiff = !!reactOutputComponentDiff
diff --git a/packages/next/src/client/components/react-dev-overlay/internal/helpers/hydration-error-info.ts b/packages/next/src/client/components/react-dev-overlay/internal/helpers/hydration-error-info.ts
index f99a6e41c55d0c..413b0746008ea9 100644
--- a/packages/next/src/client/components/react-dev-overlay/internal/helpers/hydration-error-info.ts
+++ b/packages/next/src/client/components/react-dev-overlay/internal/helpers/hydration-error-info.ts
@@ -23,15 +23,42 @@ const htmlTagsWarnings = new Set([
   "In HTML, whitespace text nodes cannot be a child of <%s>. Make sure you don't have any extra whitespace between tags on each line of your source code.\nThis will cause a hydration error.",
 ])
 
-export const getHydrationWarningType = (msg: NullableText): 'tag' | 'text' => {
+// In React 18, the warning message is prefixed with "Warning: "
+const normalizeWarningMessage = (msg: string) => msg.replace(/^Warning: /, '')
+
+// Note: React 18 only
+const textAndTagsMismatchWarnings = new Set([
+  'Warning: Expected server HTML to contain a matching text node for "%s" in <%s>.%s',
+  'Warning: Did not expect server HTML to contain the text node "%s" in <%s>.%s',
+])
+
+// Note: React 18 only
+const textMismatchWarning =
+  'Warning: Text content did not match. Server: "%s" Client: "%s"%s'
+
+const isTextMismatchWarning = (msg: NullableText) => textMismatchWarning === msg
+const isTextInTagsMismatchWarning = (msg: NullableText) =>
+  Boolean(msg && textAndTagsMismatchWarnings.has(msg))
+
+export const getHydrationWarningType = (
+  msg: NullableText
+): 'tag' | 'text' | 'text-in-tag' => {
   if (isHtmlTagsWarning(msg)) return 'tag'
   return 'text'
 }
 
-const isHtmlTagsWarning = (msg: NullableText) =>
-  Boolean(msg && htmlTagsWarnings.has(msg))
+const isHtmlTagsWarning = (msg: NullableText) => {
+  if (msg && typeof msg === 'string') {
+    return htmlTagsWarnings.has(normalizeWarningMessage(msg))
+  }
+
+  return false
+}
 
-const isKnownHydrationWarning = (msg: NullableText) => isHtmlTagsWarning(msg)
+const isKnownHydrationWarning = (msg: NullableText) =>
+  isHtmlTagsWarning(msg) ||
+  isTextInTagsMismatchWarning(msg) ||
+  isTextMismatchWarning(msg)
 
 export const getReactHydrationDiffSegments = (msg: NullableText) => {
   if (msg) {
@@ -51,14 +78,18 @@ export const getReactHydrationDiffSegments = (msg: NullableText) => {
 export function storeHydrationErrorStateFromConsoleArgs(...args: any[]) {
   const [msg, serverContent, clientContent, componentStack] = args
   if (isKnownHydrationWarning(msg)) {
-    hydrationErrorState.warning = [
-      // remove the last %s from the message
-      msg,
-      serverContent,
-      clientContent,
-    ]
+    hydrationErrorState.warning = [msg, serverContent, clientContent]
     hydrationErrorState.componentStack = componentStack
     hydrationErrorState.serverContent = serverContent
     hydrationErrorState.clientContent = clientContent
+
+    return [
+      ...args,
+      // We tack on the hydration error message to the console.error message so that
+      // it matches the error we display in the redbox overlay
+      `\nSee more info here: https://nextjs.org/docs/messages/react-hydration-error`,
+    ]
   }
+
+  return args
 }
diff --git a/packages/next/src/client/components/react-dev-overlay/pages/client.ts b/packages/next/src/client/components/react-dev-overlay/pages/client.ts
index e10ddbd1b15940..e60871157f4b89 100644
--- a/packages/next/src/client/components/react-dev-overlay/pages/client.ts
+++ b/packages/next/src/client/components/react-dev-overlay/pages/client.ts
@@ -52,11 +52,13 @@ function handleError(error: unknown) {
 
 let origConsoleError = console.error
 function nextJsHandleConsoleError(...args: any[]) {
+  // To support React 19, this will need to be updated as follows:
+  // const error = process.env.NODE_ENV !== 'production' ? args[1] : args[0]
   // See https://github.com/facebook/react/blob/d50323eb845c5fde0d720cae888bf35dedd05506/packages/react-reconciler/src/ReactFiberErrorLogger.js#L78
-  const error = process.env.NODE_ENV !== 'production' ? args[1] : args[0]
-  storeHydrationErrorStateFromConsoleArgs(...args)
+  const error = args[0]
+  const errorArgs = storeHydrationErrorStateFromConsoleArgs(...args)
   handleError(error)
-  origConsoleError.apply(window.console, args)
+  origConsoleError.apply(window.console, errorArgs)
 }
 
 function onUnhandledError(event: ErrorEvent) {
diff --git a/packages/next/src/client/legacy/image.tsx b/packages/next/src/client/legacy/image.tsx
index aa79f37ac05f58..40116cea747e86 100644
--- a/packages/next/src/client/legacy/image.tsx
+++ b/packages/next/src/client/legacy/image.tsx
@@ -9,6 +9,8 @@ import React, {
   useState,
   type JSX,
 } from 'react'
+import * as ReactDOM from 'react-dom'
+import Head from '../../shared/lib/head'
 import {
   imageConfigDefault,
   VALID_LOADERS,
@@ -26,6 +28,8 @@ function normalizeSrc(src: string): string {
   return src[0] === '/' ? src.slice(1) : src
 }
 
+const supportsFloat = typeof ReactDOM.preload === 'function'
+
 const configEnv = process.env.__NEXT_IMAGE_OPTS as any as ImageConfigComplete
 const loadedImageURLs = new Set<string>()
 const allImgs = new Map<
@@ -978,6 +982,20 @@ export default function Image({
     }
   }
 
+  const linkProps:
+    | React.DetailedHTMLProps<
+        React.LinkHTMLAttributes<HTMLLinkElement>,
+        HTMLLinkElement
+      >
+    | undefined = supportsFloat
+    ? undefined
+    : {
+        imageSrcSet: imgAttributes.srcSet,
+        imageSizes: imgAttributes.sizes,
+        crossOrigin: rest.crossOrigin,
+        referrerPolicy: rest.referrerPolicy,
+      }
+
   const useLayoutEffect =
     typeof window === 'undefined' ? React.useEffect : React.useLayoutEffect
   const onLoadingCompleteRef = useRef(onLoadingComplete)
@@ -1044,6 +1062,27 @@ export default function Image({
         ) : null}
         <ImageElement {...imgElementArgs} />
       </span>
+      {!supportsFloat && priority ? (
+        // Note how we omit the `href` attribute, as it would only be relevant
+        // for browsers that do not support `imagesrcset`, and in those cases
+        // it would likely cause the incorrect image to be preloaded.
+        //
+        // https://html.spec.whatwg.org/multipage/semantics.html#attr-link-imagesrcset
+        <Head>
+          <link
+            key={
+              '__nimg-' +
+              imgAttributes.src +
+              imgAttributes.srcSet +
+              imgAttributes.sizes
+            }
+            rel="preload"
+            as="image"
+            href={imgAttributes.srcSet ? undefined : imgAttributes.src}
+            {...linkProps}
+          />
+        </Head>
+      ) : null}
     </>
   )
 }
diff --git a/packages/next/src/client/use-merged-ref.ts b/packages/next/src/client/use-merged-ref.ts
index 7fce7fb1f0ee12..65bb8dd4dcb428 100644
--- a/packages/next/src/client/use-merged-ref.ts
+++ b/packages/next/src/client/use-merged-ref.ts
@@ -1,29 +1,34 @@
-import { useMemo, type Ref } from 'react'
+import { useMemo, useRef, type Ref } from 'react'
 
+// This is a compatibility hook to support React 18 and 19 refs.
+// In 19, a cleanup function from refs may be returned.
+// In 18, returning a cleanup function creates a warning.
+// Since we take userspace refs, we don't know ahead of time if a cleanup function will be returned.
+// This implements cleanup functions with the old behavior in 18.
+// We know refs are always called alternating with `null` and then `T`.
+// So a call with `null` means we need to call the previous cleanup functions.
 export function useMergedRef<TElement>(
   refA: Ref<TElement>,
   refB: Ref<TElement>
 ): Ref<TElement> {
-  return useMemo(() => mergeRefs(refA, refB), [refA, refB])
-}
+  const cleanupA = useRef<() => void>(() => {})
+  const cleanupB = useRef<() => void>(() => {})
 
-export function mergeRefs<TElement>(
-  refA: Ref<TElement>,
-  refB: Ref<TElement>
-): Ref<TElement> {
-  if (!refA || !refB) {
-    return refA || refB
-  }
-
-  return (current: TElement) => {
-    const cleanupA = applyRef(refA, current)
-    const cleanupB = applyRef(refB, current)
+  return useMemo(() => {
+    if (!refA || !refB) {
+      return refA || refB
+    }
 
-    return () => {
-      cleanupA()
-      cleanupB()
+    return (current: TElement | null): void => {
+      if (current === null) {
+        cleanupA.current()
+        cleanupB.current()
+      } else {
+        cleanupA.current = applyRef(refA, current)
+        cleanupB.current = applyRef(refB, current)
+      }
     }
-  }
+  }, [refA, refB])
 }
 
 function applyRef<TElement>(
diff --git a/packages/next/src/compiled/unistore/unistore.js b/packages/next/src/compiled/unistore/unistore.js
index ecfa6bcdddea5e..0e80a94691cc43 100644
--- a/packages/next/src/compiled/unistore/unistore.js
+++ b/packages/next/src/compiled/unistore/unistore.js
@@ -1 +1 @@
-(()=>{var t={583:t=>{function n(t,i){for(var _ in i)t[_]=i[_];return t}t.exports=function(t){var i=[];function u(t){for(var _=[],a=0;a<i.length;a++)i[a]===t?t=null:_.push(i[a]);i=_}function e(_,a,f){t=a?_:n(n({},t),_);for(var o=i,c=0;c<o.length;c++)o[c](t,f)}return t=t||{},{action:function(i){function r(t){e(t,!1,i)}return function(){for(var _=arguments,a=[t],f=0;f<arguments.length;f++)a.push(_[f]);var o=i.apply(this,a);if(null!=o)return o.then?o.then(r):r(o)}},setState:e,subscribe:function(t){return i.push(t),function(){u(t)}},unsubscribe:u,getState:function(){return t}}}}};var i={};function __nccwpck_require__(_){var a=i[_];if(a!==undefined){return a.exports}var f=i[_]={exports:{}};var o=true;try{t[_](f,f.exports,__nccwpck_require__);o=false}finally{if(o)delete i[_]}return f.exports}if(typeof __nccwpck_require__!=="undefined")__nccwpck_require__.ab=__dirname+"/";var _=__nccwpck_require__(583);module.exports=_})();
\ No newline at end of file
+(()=>{var t={302:t=>{function n(t,i){for(var _ in i)t[_]=i[_];return t}t.exports=function(t){var i=[];function u(t){for(var _=[],a=0;a<i.length;a++)i[a]===t?t=null:_.push(i[a]);i=_}function e(_,a,f){t=a?_:n(n({},t),_);for(var o=i,c=0;c<o.length;c++)o[c](t,f)}return t=t||{},{action:function(i){function r(t){e(t,!1,i)}return function(){for(var _=arguments,a=[t],f=0;f<arguments.length;f++)a.push(_[f]);var o=i.apply(this,a);if(null!=o)return o.then?o.then(r):r(o)}},setState:e,subscribe:function(t){return i.push(t),function(){u(t)}},unsubscribe:u,getState:function(){return t}}}}};var i={};function __nccwpck_require__(_){var a=i[_];if(a!==undefined){return a.exports}var f=i[_]={exports:{}};var o=true;try{t[_](f,f.exports,__nccwpck_require__);o=false}finally{if(o)delete i[_]}return f.exports}if(typeof __nccwpck_require__!=="undefined")__nccwpck_require__.ab=__dirname+"/";var _=__nccwpck_require__(302);module.exports=_})();
\ No newline at end of file
diff --git a/packages/next/src/server/render.tsx b/packages/next/src/server/render.tsx
index d78bb6adffcf57..cd6bc2db0324ed 100644
--- a/packages/next/src/server/render.tsx
+++ b/packages/next/src/server/render.tsx
@@ -40,7 +40,7 @@ import type { Revalidate, SwrDelta } from './lib/revalidate'
 import type { COMPILER_NAMES } from '../shared/lib/constants'
 
 import React, { type JSX } from 'react'
-import ReactDOMServerEdge from 'react-dom/server.edge'
+import ReactDOMServerBrowser from 'react-dom/server.browser'
 import { StyleRegistry, createStyleRegistry } from 'styled-jsx'
 import {
   GSP_NO_RETURNED_VALUE,
@@ -127,7 +127,8 @@ function noRouter() {
 }
 
 async function renderToString(element: React.ReactElement) {
-  const renderStream = await ReactDOMServerEdge.renderToReadableStream(element)
+  const renderStream =
+    await ReactDOMServerBrowser.renderToReadableStream(element)
   await renderStream.allReady
   return streamToString(renderStream)
 }
@@ -1322,7 +1323,7 @@ export async function renderToHTMLImpl(
     ) => {
       const content = renderContent(EnhancedApp, EnhancedComponent)
       return await renderToInitialFizzStream({
-        ReactDOMServer: ReactDOMServerEdge,
+        ReactDOMServer: ReactDOMServerBrowser,
         element: content,
       })
     }
diff --git a/packages/next/types/react-dom.d.ts b/packages/next/types/react-dom.d.ts
index 9b811922e4d557..7c11484f3bb368 100644
--- a/packages/next/types/react-dom.d.ts
+++ b/packages/next/types/react-dom.d.ts
@@ -70,6 +70,10 @@ declare module 'react-dom/server.edge' {
   >
 }
 
+declare module 'react-dom/server.browser' {
+  export * from 'react-dom/server.edge'
+}
+
 declare module 'react-dom/static.edge' {
   import type { JSX } from 'react'
   /**
diff --git a/packages/next/webpack.config.js b/packages/next/webpack.config.js
index 51e2090a116431..7f4af265bf73ce 100644
--- a/packages/next/webpack.config.js
+++ b/packages/next/webpack.config.js
@@ -13,6 +13,7 @@ const pagesExternals = [
   'react-dom/package.json',
   'react-dom/client',
   'react-dom/server',
+  'react-dom/server.browser',
   'react-dom/server.edge',
   'react-server-dom-webpack/client',
   'react-server-dom-webpack/client.edge',
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 808e8f1d6118e9..9950e303010638 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -15,10 +15,10 @@ overrides:
   '@babel/traverse': 7.22.5
   '@types/react': npm:types-react@19.0.0-rc.0
   '@types/react-dom': npm:types-react-dom@19.0.0-rc.0
-  react: 19.0.0-rc-7771d3a7-20240827
-  react-dom: 19.0.0-rc-7771d3a7-20240827
-  react-is: 19.0.0-rc-7771d3a7-20240827
-  scheduler: 0.25.0-rc-7771d3a7-20240827
+  react: 18.3.1
+  react-dom: 18.3.1
+  react-is: 18.3.1
+  scheduler: 0.23.2
 
 patchedDependencies:
   webpack-sources@3.2.3:
@@ -64,7 +64,7 @@ importers:
         version: 11.11.0
       '@emotion/react':
         specifier: 11.11.1
-        version: 11.11.1(react@19.0.0-rc-7771d3a7-20240827)(types-react@19.0.0-rc.0)
+        version: 11.11.1(react@18.3.1)(types-react@19.0.0-rc.0)
       '@fullhuman/postcss-purgecss':
         specifier: 1.3.0
         version: 1.3.0
@@ -73,7 +73,7 @@ importers:
         version: 2.2.1(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13)))
       '@mdx-js/react':
         specifier: 2.2.1
-        version: 2.2.1(react@19.0.0-rc-7771d3a7-20240827)
+        version: 2.2.1(react@18.3.1)
       '@next/bundle-analyzer':
         specifier: workspace:*
         version: link:packages/next-bundle-analyzer
@@ -139,7 +139,7 @@ importers:
         version: 6.1.2(@jest/globals@29.7.0)(@types/jest@29.5.5)(jest@29.7.0(@types/node@20.12.3)(babel-plugin-macros@3.1.0))
       '@testing-library/react':
         specifier: ^15.0.5
-        version: 15.0.7(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)(types-react@19.0.0-rc.0)
+        version: 15.0.7(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(types-react@19.0.0-rc.0)
       '@types/busboy':
         specifier: 1.5.3
         version: 1.5.3
@@ -450,8 +450,8 @@ importers:
         specifier: 0.3.0
         version: 0.3.0
       react:
-        specifier: 19.0.0-rc-7771d3a7-20240827
-        version: 19.0.0-rc-7771d3a7-20240827
+        specifier: 18.3.1
+        version: 18.3.1
       react-17:
         specifier: npm:react@17.0.2
         version: react@17.0.2
@@ -459,17 +459,17 @@ importers:
         specifier: npm:react@19.0.0-rc-7771d3a7-20240827
         version: react@19.0.0-rc-7771d3a7-20240827
       react-dom:
-        specifier: 19.0.0-rc-7771d3a7-20240827
-        version: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+        specifier: 18.3.1
+        version: 18.3.1(react@18.3.1)
       react-dom-17:
         specifier: npm:react-dom@17.0.2
-        version: react-dom@17.0.2(react@19.0.0-rc-7771d3a7-20240827)
+        version: react-dom@17.0.2(react@18.3.1)
       react-dom-builtin:
         specifier: npm:react-dom@19.0.0-rc-7771d3a7-20240827
-        version: react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+        version: react-dom@19.0.0-rc-7771d3a7-20240827(react@18.3.1)
       react-dom-experimental-builtin:
         specifier: npm:react-dom@0.0.0-experimental-7771d3a7-20240827
-        version: react-dom@0.0.0-experimental-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+        version: react-dom@0.0.0-experimental-7771d3a7-20240827(react@18.3.1)
       react-experimental-builtin:
         specifier: npm:react@0.0.0-experimental-7771d3a7-20240827
         version: react@0.0.0-experimental-7771d3a7-20240827
@@ -478,22 +478,22 @@ importers:
         version: react-is@19.0.0-rc-7771d3a7-20240827
       react-server-dom-turbopack:
         specifier: 19.0.0-rc-7771d3a7-20240827
-        version: 19.0.0-rc-7771d3a7-20240827(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)
+        version: 19.0.0-rc-7771d3a7-20240827(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
       react-server-dom-turbopack-experimental:
         specifier: npm:react-server-dom-turbopack@0.0.0-experimental-7771d3a7-20240827
-        version: react-server-dom-turbopack@0.0.0-experimental-7771d3a7-20240827(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)
+        version: react-server-dom-turbopack@0.0.0-experimental-7771d3a7-20240827(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
       react-server-dom-webpack:
         specifier: 19.0.0-rc-7771d3a7-20240827
-        version: 19.0.0-rc-7771d3a7-20240827(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13)))
+        version: 19.0.0-rc-7771d3a7-20240827(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13)))
       react-server-dom-webpack-experimental:
         specifier: npm:react-server-dom-webpack@0.0.0-experimental-7771d3a7-20240827
-        version: react-server-dom-webpack@0.0.0-experimental-7771d3a7-20240827(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13)))
+        version: react-server-dom-webpack@0.0.0-experimental-7771d3a7-20240827(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13)))
       react-ssr-prepass:
         specifier: 1.0.8
-        version: 1.0.8(react-is@19.0.0-rc-f90a6bcc-20240827)(react@19.0.0-rc-7771d3a7-20240827)
+        version: 1.0.8(react-is@19.0.0-rc-f90a6bcc-20240827)(react@18.3.1)
       react-virtualized:
         specifier: 9.22.3
-        version: 9.22.3(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)
+        version: 9.22.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
       relay-compiler:
         specifier: 13.0.2
         version: 13.0.2
@@ -535,16 +535,16 @@ importers:
         version: 6.0.0
       styled-components:
         specifier: 6.0.0-rc.3
-        version: 6.0.0-rc.3(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)
+        version: 6.0.0-rc.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
       styled-jsx:
         specifier: 5.1.6
-        version: 5.1.6(@babel/core@7.22.5)(babel-plugin-macros@3.1.0)(react@19.0.0-rc-7771d3a7-20240827)
+        version: 5.1.6(@babel/core@7.22.5)(babel-plugin-macros@3.1.0)(react@18.3.1)
       styled-jsx-plugin-postcss:
         specifier: 3.0.2
         version: 3.0.2
       swr:
         specifier: ^2.2.4
-        version: 2.2.4(react@19.0.0-rc-7771d3a7-20240827)
+        version: 2.2.4(react@18.3.1)
       tailwindcss:
         specifier: 3.2.7
         version: 3.2.7(postcss@8.4.31)
@@ -871,17 +871,17 @@ importers:
         specifier: 8.4.31
         version: 8.4.31
       react:
-        specifier: 19.0.0-rc-7771d3a7-20240827
-        version: 19.0.0-rc-7771d3a7-20240827
+        specifier: 18.3.1
+        version: 18.3.1
       react-dom:
-        specifier: 19.0.0-rc-7771d3a7-20240827
-        version: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+        specifier: 18.3.1
+        version: 18.3.1(react@18.3.1)
       sass:
         specifier: ^1.3.0
         version: 1.77.8
       styled-jsx:
         specifier: 5.1.6
-        version: 5.1.6(@babel/core@7.22.5)(babel-plugin-macros@3.1.0)(react@19.0.0-rc-7771d3a7-20240827)
+        version: 5.1.6(@babel/core@7.22.5)(babel-plugin-macros@3.1.0)(react@18.3.1)
     optionalDependencies:
       sharp:
         specifier: ^0.33.5
@@ -1462,7 +1462,7 @@ importers:
         version: 1.0.35
       unistore:
         specifier: 3.4.1
-        version: 3.4.1(react@19.0.0-rc-7771d3a7-20240827)
+        version: 3.4.1(react@18.3.1)
       util:
         specifier: 0.12.4
         version: 0.12.4
@@ -1596,8 +1596,8 @@ importers:
   packages/third-parties:
     dependencies:
       react:
-        specifier: 19.0.0-rc-7771d3a7-20240827
-        version: 19.0.0-rc-7771d3a7-20240827
+        specifier: 18.3.1
+        version: 18.3.1
       third-party-capital:
         specifier: 1.0.20
         version: 1.0.20
@@ -1657,14 +1657,14 @@ importers:
         specifier: 29.5.0
         version: 29.5.0
       react:
-        specifier: 19.0.0-rc-7771d3a7-20240827
-        version: 19.0.0-rc-7771d3a7-20240827
+        specifier: 18.3.1
+        version: 18.3.1
       react-test-renderer:
         specifier: 18.2.0
-        version: 18.2.0(react@19.0.0-rc-7771d3a7-20240827)
+        version: 18.2.0(react@18.3.1)
       styled-jsx:
         specifier: ^5.1.2
-        version: 5.1.6(@babel/core@7.22.5)(babel-plugin-macros@3.1.0)(react@19.0.0-rc-7771d3a7-20240827)
+        version: 5.1.6(@babel/core@7.22.5)(babel-plugin-macros@3.1.0)(react@18.3.1)
 
   turbopack/packages/devlow-bench:
     dependencies:
@@ -3276,7 +3276,7 @@ packages:
     resolution: {integrity: sha512-5mlW1DquU5HaxjLkfkGN1GA/fvVGdyHURRiX/0FHl2cfIfRxSOfmxEH5YS43edp0OldZrZ+dkBKbngxcNCdZvA==}
     peerDependencies:
       '@types/react': '*'
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -3293,7 +3293,7 @@ packages:
   '@emotion/use-insertion-effect-with-fallbacks@1.0.1':
     resolution: {integrity: sha512-jT/qyKZ9rzLErtrjGgdkMBn2OP8wl0G3sQlBb3YPryvKHsjvINUhVaPFfP+fpBcOkmrVOVEEHQFJ7nbj2TH2gw==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   '@emotion/utils@1.2.1':
     resolution: {integrity: sha512-Y2tGf3I+XVnajdItskUCn6LX+VUDmP6lTL4fcqsXAv43dnlbZiuW4MWQW38rW/BVWSE7Q/7+XQocmpnRYILUmg==}
@@ -3486,14 +3486,14 @@ packages:
   '@floating-ui/react-dom@2.1.0':
     resolution: {integrity: sha512-lNzj5EQmEKn5FFKc04+zasr09h/uX8RtJRNj5gUXsSQIXHVWTVh+hVAg1vOMCexkX8EgvemMvIFpQfkosnVNyA==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
 
   '@floating-ui/react@0.26.16':
     resolution: {integrity: sha512-HEf43zxZNAI/E781QIVpYSF3K2VH4TTYZpqecjdsFkjsaU1EbaWcM++kw0HXFffj7gDUcBFevX8s0rQGQpxkow==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
 
   '@floating-ui/utils@0.2.2':
     resolution: {integrity: sha512-J4yDIIthosAsRZ5CPYP/jQvUAQtlZTTD/4suA08/FEnlxqW3sKS9iAhgsa9VYLZ6vDHn/ixJgIqRQPotoBjxIw==}
@@ -4133,13 +4133,13 @@ packages:
     resolution: {integrity: sha512-l9ypojKN3PjwO1CSLIsqxi7mA25+7w+xc71Q+JuCCREI0tuGwkZsKbIOpuTATIJOjPh8ycLiW7QxX1LYsRTq6w==}
     peerDependencies:
       '@mantine/hooks': 7.10.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
 
   '@mantine/hooks@7.11.2':
     resolution: {integrity: sha512-jhyVe/sbDEG2U8rr2lMecUPgQxcfr5hh9HazqGfkS7ZRIMDO7uJ947yAcTMGGkp5Lxtt5TBFt1Cb6tiB2/1agg==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   '@mapbox/node-pre-gyp@1.0.5':
     resolution: {integrity: sha512-4srsKPXWlIxp5Vbqz5uLfBN+du2fJChBoYn/f2h991WLdk7jUvcSk/McVLSv/X+xQIPI8eGD5GjrnygdyHnhPA==}
@@ -4156,7 +4156,7 @@ packages:
   '@mdx-js/react@2.2.1':
     resolution: {integrity: sha512-YdXcMcEnqZhzql98RNrqYo9cEhTTesBiCclEtoiQUbJwx87q9453GTapYU6kJ8ZZ2ek1Vp25SiAXEFy5O/eAPw==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   '@mswjs/cookies@1.1.0':
     resolution: {integrity: sha512-0ZcCVQxifZmhwNBoQIrystCb+2sWBY2Zw8lpfJBPCHGCA/HWqehITeCRVIv4VMy8MPlaHo2w2pTHFV2pFfqKPw==}
@@ -4839,8 +4839,8 @@ packages:
     engines: {node: '>=18'}
     peerDependencies:
       '@types/react': npm:types-react@19.0.0-rc.0
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -10368,7 +10368,7 @@ packages:
   lucide-react@0.383.0:
     resolution: {integrity: sha512-13xlG0CQCJtzjSQYwwJ3WRqMHtRj3EXmLlorrARt7y+IHnxUCp3XyFNL1DfaGySWxHObDvnu1u1dV+0VMKHUSg==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   lz-string@1.5.0:
     resolution: {integrity: sha512-h5bgJWpxJNswbU7qCrV0tIKQCaS3blPDrqKWx+QxzuzL1zGUzij9XCWLrSLsJPu5t+eWA/ycetzYAO5IOMcWAQ==}
@@ -12607,22 +12607,30 @@ packages:
   react-dom@0.0.0-experimental-7771d3a7-20240827:
     resolution: {integrity: sha512-lgOBiTipHJIKgJyiaV/YhL28X0vdt30fuHQxiW73/3WSu/ePSO/hV8uSefpiPhqMTq4TUKKylOBHhcG1/fy3Jw==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   react-dom@17.0.2:
     resolution: {integrity: sha512-s4h96KtLDUQlsENhMn1ar8t2bEa+q/YAtj8pPPdIjPDGBDIVNsrD9aXNWqspUe6AzKCIG0C1HZZLqLV7qpOBGA==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+
+  react-dom@18.3.1:
+    resolution: {integrity: sha512-5m4nQKp+rZRb09LNH59GM4BxTh9251/ylbKIbpe7TpGxfJ+9kv6BLkLBXIjjspbgbnIBNqlI23tRnTWT0snUIw==}
+    peerDependencies:
+      react: 18.3.1
 
   react-dom@19.0.0-rc-7771d3a7-20240827:
     resolution: {integrity: sha512-EMgZJX6EEQEr+pso+9ySkrEMPv3N7zF2fbi0f6uB+X7r8E+O2GqPRcIHtFigMdW8uS0XCVFHAocMnIc4yPULYQ==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   react-dom@19.0.0-rc-f90a6bcc-20240827:
     resolution: {integrity: sha512-oUa/reDvGtjRcxi8u+GYHaDHanudaO28+G+Wvxm50CItW1xwIFN2Nn7foJxxDS9lFLGdRWZvjxldZEPAUSuXbg==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+
+  react-is@18.3.1:
+    resolution: {integrity: sha512-/LLMVyas0ljjAtoYiPqYiL8VWXzUUdThrmU5+n20DZv+a+ClRoevUzw5JxU+Ieh5/c87ytoTBV9G1FiKfNJdmg==}
 
   react-is@19.0.0-rc-7771d3a7-20240827:
     resolution: {integrity: sha512-vy9RwFmrhsGQAJEbFQyTskRWXVm39Ax2Ikao51VX2GBXoV2XOQ17vdhyhltCOa+yuoNj0p3X2C90+bxG+w2u0Q==}
@@ -12636,8 +12644,8 @@ packages:
   react-number-format@5.4.0:
     resolution: {integrity: sha512-NWdICrqLhI7rAS8yUeLVd6Wr4cN7UjJ9IBTS0f/a9i7UB4x4Ti70kGnksBtZ7o4Z7YRbvCMMR/jQmkoOBa/4fg==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
 
   react-refresh@0.12.0:
     resolution: {integrity: sha512-suLIhrU2IHKL5JEKR/fAwJv7bbeq4kJ+pJopf77jHwuR+HmJS/HbrPIGsTBUVfw7tXPOmYv7UJ7PCaN49e8x4A==}
@@ -12648,7 +12656,7 @@ packages:
     engines: {node: '>=10'}
     peerDependencies:
       '@types/react': npm:types-react@19.0.0-rc.0
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -12658,7 +12666,7 @@ packages:
     engines: {node: '>=10'}
     peerDependencies:
       '@types/react': npm:types-react@19.0.0-rc.0
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -12667,49 +12675,49 @@ packages:
     resolution: {integrity: sha512-5j6sur5W5Oj7XZfS8EjvwmnbvaW42HHPY00ur0/HCvUxZNEPsTg7Ri4y3WlP4ebZTKdubCU5hD/Nt5/GkxvnuQ==}
     engines: {node: '>=0.10.0'}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
 
   react-server-dom-turbopack@19.0.0-rc-7771d3a7-20240827:
     resolution: {integrity: sha512-KkipAuYaTTQivseV0DNwRS8K6o8K5YuohXlXS5NY9QPXAyyk/Q2LSFUayMrk9ICAmty+Fs5xVjN4UAIpi1gmOQ==}
     engines: {node: '>=0.10.0'}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
 
   react-server-dom-webpack@0.0.0-experimental-7771d3a7-20240827:
     resolution: {integrity: sha512-swlsAzmGKLEp+afolIWJo8jIwt0GLux2j4IQzqVRRw1j/1nn7aO6a5po/rveOMR6XT/ktsE307vre8rEBungxQ==}
     engines: {node: '>=0.10.0'}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
       webpack: 5.90.0
 
   react-server-dom-webpack@19.0.0-rc-7771d3a7-20240827:
     resolution: {integrity: sha512-2r7481kcNjYtQ97f9fuVnT6YSPk4b6RCno+4UoBSKYDq1nCU/Ybj0b1O/68BqYGdpu5fYI0UVDrfI3ywWVuvbg==}
     engines: {node: '>=0.10.0'}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
       webpack: 5.90.0
 
   react-shallow-renderer@16.15.0:
     resolution: {integrity: sha512-oScf2FqQ9LFVQgA73vr86xl2NaOIX73rh+YFqcOp68CWj56tSfgtGKrEbyhCj0rSijyG9M1CYprTh39fBi5hzA==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   react-ssr-prepass@1.0.8:
     resolution: {integrity: sha512-O0gfRA1SaK+9ITKxqfnXsej2jF+OHGP/+GxD4unROQaM/0/UczGF9fuF+wTboxaQoKdIf4FvS3h/OigWh704VA==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-is: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-is: 18.3.1
 
   react-style-singleton@2.2.1:
     resolution: {integrity: sha512-ZWj0fHEMyWkHzKYUr2Bs/4zU6XLmq9HsgBURm7g5pAVfyn49DgUiNgY2d4lXRlYSiCif9YBGpQleewkcqddc7g==}
     engines: {node: '>=10'}
     peerDependencies:
       '@types/react': npm:types-react@19.0.0-rc.0
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -12717,19 +12725,19 @@ packages:
   react-test-renderer@18.2.0:
     resolution: {integrity: sha512-JWD+aQ0lh2gvh4NM3bBM42Kx+XybOxCpgYK7F8ugAlpaTSnWsX+39Z4XkOykGZAHrjwwTZT3x3KxswVWxHPUqA==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   react-textarea-autosize@8.5.3:
     resolution: {integrity: sha512-XT1024o2pqCuZSuBt9FwHlaDeNtVrtCXu0Rnz88t1jUGheCLa3PhjE1GH8Ctm2axEtvdCl5SUHYschyQ0L5QHQ==}
     engines: {node: '>=10'}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   react-virtualized@9.22.3:
     resolution: {integrity: sha512-MKovKMxWTcwPSxE1kK1HcheQTWfuCxAuBoSTf2gwyMM21NdX/PXUhnoP8Uc5dRKd+nKm8v41R36OellhdCpkrw==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
 
   react@0.0.0-experimental-7771d3a7-20240827:
     resolution: {integrity: sha512-Jh40juQIRyTl4q5yH53JzVLCP5h5CcnDBgfcz8hYQTLvvKoxWFr5dR78mUIrc8IPInn8bcOconodGJaXYVqTSQ==}
@@ -12739,6 +12747,10 @@ packages:
     resolution: {integrity: sha512-gnhPt75i/dq/z3/6q/0asP78D0u592D5L1pd7M8P+dck6Fu/jJeL6iVVK23fptSUZj8Vjf++7wXA8UNclGQcbA==}
     engines: {node: '>=0.10.0'}
 
+  react@18.3.1:
+    resolution: {integrity: sha512-wS+hAgJShR0KhEvPJArfuPVN1+Hz1t0Y6n5jLrGQbkb4urgPE/0Rve+1kMB1v/oWgHgm4WIcV+i7F2pTVj+2iQ==}
+    engines: {node: '>=0.10.0'}
+
   react@19.0.0-rc-7771d3a7-20240827:
     resolution: {integrity: sha512-Xg6LoxgPpT4efYHzRB2gUUQCoNXu2df3sOBRgiUvzTVT1qQNOV611/w80JiOmnTWlIyCaUfSkNrMG8OUO/D+AA==}
     engines: {node: '>=0.10.0'}
@@ -13269,6 +13281,9 @@ packages:
   scheduler@0.0.0-experimental-7771d3a7-20240827:
     resolution: {integrity: sha512-/5YtUIFqGx1aHcSLqT9VBmzJ1nX8XOYkooipvfwH4ZRYuGptkHypXx+FUO4caZoN0O29dI3yUBUk3msVp6wMyg==}
 
+  scheduler@0.23.2:
+    resolution: {integrity: sha512-UOShsPwz7NrMUqhR6t0hWjFduvOzbtv7toDH1/hIrfRNIDBnnBWd0CwJTGvTpngVlmwGCdP9/Zl/tVrDqcuYzQ==}
+
   scheduler@0.25.0-rc-7771d3a7-20240827:
     resolution: {integrity: sha512-n4nHmAoerbIOSrH24w0+fcdCUwQ4Npm7yXfsrn09FL01OWIaxpuo4P0rj3qPyLFgsJDbn18sWvLVB/e/KPnR+A==}
 
@@ -13844,8 +13859,8 @@ packages:
     engines: {node: '>= 16'}
     peerDependencies:
       babel-plugin-styled-components: '>= 2'
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-dom: 18.3.1
     peerDependenciesMeta:
       babel-plugin-styled-components:
         optional: true
@@ -13859,7 +13874,7 @@ packages:
     peerDependencies:
       '@babel/core': '*'
       babel-plugin-macros: '*'
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@babel/core':
         optional: true
@@ -13936,7 +13951,7 @@ packages:
   swr@2.2.4:
     resolution: {integrity: sha512-njiZ/4RiIhoOlAaLYDqwz5qH/KZXVilRLvomrx83HjzCWTfa+InyfAjv05PSFxnmLzZkNO9ZfvgoqzAaEI4sGQ==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   symbol-observable@1.0.1:
     resolution: {integrity: sha512-Kb3PrPYz4HanVF1LVGuAdW6LoVgIwjUYJGzFe7NDrBLCN4lsV/5J0MFurV+ygS4bRVwrCEt2c7MQ1R2a72oJDw==}
@@ -14674,7 +14689,7 @@ packages:
     engines: {node: '>=10'}
     peerDependencies:
       '@types/react': npm:types-react@19.0.0-rc.0
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -14682,13 +14697,13 @@ packages:
   use-composed-ref@1.3.0:
     resolution: {integrity: sha512-GLMG0Jc/jiKov/3Ulid1wbv3r54K9HlMW29IWcDFPEqFkSO2nS0MuefWgMJpeHQ9YJeXDL3ZUF+P3jdXlZX/cQ==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   use-isomorphic-layout-effect@1.1.2:
     resolution: {integrity: sha512-49L8yCO3iGT/ZF9QttjwLF/ZD9Iwto5LnH5LmEdk/6cFmXddqi2ulF0edxTwjj+7mqvpVVGQWvbXZdn32wRSHA==}
     peerDependencies:
       '@types/react': '*'
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -14697,7 +14712,7 @@ packages:
     resolution: {integrity: sha512-xA+AVm/Wlg3e2P/JiItTziwS7FK92LWrDB0p+hgXloIMuVCeJJ8v6f0eeHyPZaJrM+usM1FkFfbNCrJGs8A/zw==}
     peerDependencies:
       '@types/react': '*'
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -14707,7 +14722,7 @@ packages:
     engines: {node: '>=10'}
     peerDependencies:
       '@types/react': npm:types-react@19.0.0-rc.0
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     peerDependenciesMeta:
       '@types/react':
         optional: true
@@ -14715,7 +14730,7 @@ packages:
   use-sync-external-store@1.2.0:
     resolution: {integrity: sha512-eEgnFxGQ1Ife9bzYs6VLi8/4X6CObHMw9Qr9tPY43iKwsPw8xE8+EFsf/2cFZ5S3esXgpWgtSCtLNS41F+sKPA==}
     peerDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   use@3.1.1:
     resolution: {integrity: sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==}
@@ -17103,17 +17118,17 @@ snapshots:
 
   '@emotion/memoize@0.8.1': {}
 
-  '@emotion/react@11.11.1(react@19.0.0-rc-7771d3a7-20240827)(types-react@19.0.0-rc.0)':
+  '@emotion/react@11.11.1(react@18.3.1)(types-react@19.0.0-rc.0)':
     dependencies:
       '@babel/runtime': 7.22.5
       '@emotion/babel-plugin': 11.11.0
       '@emotion/cache': 11.11.0
       '@emotion/serialize': 1.1.2
-      '@emotion/use-insertion-effect-with-fallbacks': 1.0.1(react@19.0.0-rc-7771d3a7-20240827)
+      '@emotion/use-insertion-effect-with-fallbacks': 1.0.1(react@18.3.1)
       '@emotion/utils': 1.2.1
       '@emotion/weak-memoize': 0.3.1
       hoist-non-react-statics: 3.3.2
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     optionalDependencies:
       '@types/react': types-react@19.0.0-rc.0
 
@@ -17129,9 +17144,9 @@ snapshots:
 
   '@emotion/unitless@0.8.1': {}
 
-  '@emotion/use-insertion-effect-with-fallbacks@1.0.1(react@19.0.0-rc-7771d3a7-20240827)':
+  '@emotion/use-insertion-effect-with-fallbacks@1.0.1(react@18.3.1)':
     dependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   '@emotion/utils@1.2.1': {}
 
@@ -18491,11 +18506,11 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@mdx-js/react@2.2.1(react@19.0.0-rc-7771d3a7-20240827)':
+  '@mdx-js/react@2.2.1(react@18.3.1)':
     dependencies:
       '@types/mdx': 2.0.3
       '@types/react': types-react@19.0.0-rc.0
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   '@mdx-js/react@2.2.1(react@19.0.0-rc-f90a6bcc-20240827)':
     dependencies:
@@ -19314,13 +19329,13 @@ snapshots:
       '@types/jest': 29.5.5
       jest: 29.7.0(@types/node@20.12.3)(babel-plugin-macros@3.1.0)
 
-  '@testing-library/react@15.0.7(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)(types-react@19.0.0-rc.0)':
+  '@testing-library/react@15.0.7(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(types-react@19.0.0-rc.0)':
     dependencies:
       '@babel/runtime': 7.22.5
       '@testing-library/dom': 10.1.0
       '@types/react-dom': types-react-dom@19.0.0-rc.0
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
     optionalDependencies:
       '@types/react': types-react@19.0.0-rc.0
 
@@ -24247,7 +24262,7 @@ snapshots:
 
   hoist-non-react-statics@3.3.2:
     dependencies:
-      react-is: 19.0.0-rc-7771d3a7-20240827
+      react-is: 18.3.1
 
   homedir-polyfill@1.0.3:
     dependencies:
@@ -28686,25 +28701,25 @@ snapshots:
       '@jest/types': 24.9.0
       ansi-regex: 4.1.0
       ansi-styles: 3.2.1
-      react-is: 19.0.0-rc-7771d3a7-20240827
+      react-is: 18.3.1
 
   pretty-format@27.5.1:
     dependencies:
       ansi-regex: 5.0.1
       ansi-styles: 5.2.0
-      react-is: 19.0.0-rc-7771d3a7-20240827
+      react-is: 18.3.1
 
   pretty-format@29.5.0:
     dependencies:
       '@jest/schemas': 29.4.3
       ansi-styles: 5.2.0
-      react-is: 19.0.0-rc-7771d3a7-20240827
+      react-is: 18.3.1
 
   pretty-format@29.7.0:
     dependencies:
       '@jest/schemas': 29.6.3
       ansi-styles: 5.2.0
-      react-is: 19.0.0-rc-7771d3a7-20240827
+      react-is: 18.3.1
 
   pretty-ms@7.0.0:
     dependencies:
@@ -28761,7 +28776,7 @@ snapshots:
     dependencies:
       loose-envify: 1.4.0
       object-assign: 4.1.1
-      react-is: 19.0.0-rc-7771d3a7-20240827
+      react-is: 18.3.1
 
   property-information@5.6.0:
     dependencies:
@@ -28933,27 +28948,35 @@ snapshots:
       minimist: 1.2.8
       strip-json-comments: 2.0.1
 
-  react-dom@0.0.0-experimental-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827):
+  react-dom@0.0.0-experimental-7771d3a7-20240827(react@18.3.1):
     dependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      scheduler: 0.25.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      scheduler: 0.23.2
 
-  react-dom@17.0.2(react@19.0.0-rc-7771d3a7-20240827):
+  react-dom@17.0.2(react@18.3.1):
     dependencies:
       loose-envify: 1.4.0
       object-assign: 4.1.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      scheduler: 0.25.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      scheduler: 0.23.2
+
+  react-dom@18.3.1(react@18.3.1):
+    dependencies:
+      loose-envify: 1.4.0
+      react: 18.3.1
+      scheduler: 0.23.2
 
-  react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827):
+  react-dom@19.0.0-rc-7771d3a7-20240827(react@18.3.1):
     dependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      scheduler: 0.25.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      scheduler: 0.23.2
 
   react-dom@19.0.0-rc-f90a6bcc-20240827(react@19.0.0-rc-f90a6bcc-20240827):
     dependencies:
       react: 19.0.0-rc-f90a6bcc-20240827
-      scheduler: 0.25.0-rc-7771d3a7-20240827
+      scheduler: 0.23.2
+
+  react-is@18.3.1: {}
 
   react-is@19.0.0-rc-7771d3a7-20240827: {}
 
@@ -28988,48 +29011,48 @@ snapshots:
     optionalDependencies:
       '@types/react': types-react@19.0.0-rc.0
 
-  react-server-dom-turbopack@0.0.0-experimental-7771d3a7-20240827(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827):
+  react-server-dom-turbopack@0.0.0-experimental-7771d3a7-20240827(react-dom@18.3.1(react@18.3.1))(react@18.3.1):
     dependencies:
       acorn-loose: 8.3.0
       neo-async: 2.6.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
 
-  react-server-dom-turbopack@19.0.0-rc-7771d3a7-20240827(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827):
+  react-server-dom-turbopack@19.0.0-rc-7771d3a7-20240827(react-dom@18.3.1(react@18.3.1))(react@18.3.1):
     dependencies:
       acorn-loose: 8.3.0
       neo-async: 2.6.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
 
-  react-server-dom-webpack@0.0.0-experimental-7771d3a7-20240827(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13))):
+  react-server-dom-webpack@0.0.0-experimental-7771d3a7-20240827(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13))):
     dependencies:
       acorn-loose: 8.3.0
       neo-async: 2.6.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
       webpack: 5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13))
       webpack-sources: 3.2.3(patch_hash=jbynf5dc46ambamq3wuyho6hkq)
 
-  react-server-dom-webpack@19.0.0-rc-7771d3a7-20240827(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827)(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13))):
+  react-server-dom-webpack@19.0.0-rc-7771d3a7-20240827(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(webpack@5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13))):
     dependencies:
       acorn-loose: 8.3.0
       neo-async: 2.6.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
       webpack: 5.90.0(@swc/core@1.6.13(@swc/helpers@0.5.13))
       webpack-sources: 3.2.3(patch_hash=jbynf5dc46ambamq3wuyho6hkq)
 
-  react-shallow-renderer@16.15.0(react@19.0.0-rc-7771d3a7-20240827):
+  react-shallow-renderer@16.15.0(react@18.3.1):
     dependencies:
       object-assign: 4.1.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-is: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-is: 18.3.1
 
-  react-ssr-prepass@1.0.8(react-is@19.0.0-rc-f90a6bcc-20240827)(react@19.0.0-rc-7771d3a7-20240827):
+  react-ssr-prepass@1.0.8(react-is@19.0.0-rc-f90a6bcc-20240827)(react@18.3.1):
     dependencies:
       object-is: 1.0.2
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
       react-is: 19.0.0-rc-f90a6bcc-20240827
 
   react-style-singleton@2.2.1(react@19.0.0-rc-f90a6bcc-20240827)(types-react@19.0.0-rc.0):
@@ -29041,12 +29064,12 @@ snapshots:
     optionalDependencies:
       '@types/react': types-react@19.0.0-rc.0
 
-  react-test-renderer@18.2.0(react@19.0.0-rc-7771d3a7-20240827):
+  react-test-renderer@18.2.0(react@18.3.1):
     dependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-is: 19.0.0-rc-7771d3a7-20240827
-      react-shallow-renderer: 16.15.0(react@19.0.0-rc-7771d3a7-20240827)
-      scheduler: 0.25.0-rc-7771d3a7-20240827
+      react: 18.3.1
+      react-is: 18.3.1
+      react-shallow-renderer: 16.15.0(react@18.3.1)
+      scheduler: 0.23.2
 
   react-textarea-autosize@8.5.3(react@19.0.0-rc-f90a6bcc-20240827)(types-react@19.0.0-rc.0):
     dependencies:
@@ -29057,15 +29080,15 @@ snapshots:
     transitivePeerDependencies:
       - '@types/react'
 
-  react-virtualized@9.22.3(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827):
+  react-virtualized@9.22.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1):
     dependencies:
       '@babel/runtime': 7.22.5
       clsx: 1.1.1
       dom-helpers: 5.2.1
       loose-envify: 1.4.0
       prop-types: 15.8.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
       react-lifecycles-compat: 3.0.4
 
   react@0.0.0-experimental-7771d3a7-20240827: {}
@@ -29075,6 +29098,10 @@ snapshots:
       loose-envify: 1.4.0
       object-assign: 4.1.1
 
+  react@18.3.1:
+    dependencies:
+      loose-envify: 1.4.0
+
   react@19.0.0-rc-7771d3a7-20240827: {}
 
   react@19.0.0-rc-f90a6bcc-20240827: {}
@@ -29767,6 +29794,10 @@ snapshots:
 
   scheduler@0.0.0-experimental-7771d3a7-20240827: {}
 
+  scheduler@0.23.2:
+    dependencies:
+      loose-envify: 1.4.0
+
   scheduler@0.25.0-rc-7771d3a7-20240827: {}
 
   schema-utils@2.7.1:
@@ -30419,7 +30450,7 @@ snapshots:
     dependencies:
       inline-style-parser: 0.1.1
 
-  styled-components@6.0.0-rc.3(react-dom@19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827))(react@19.0.0-rc-7771d3a7-20240827):
+  styled-components@6.0.0-rc.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1):
     dependencies:
       '@babel/cli': 7.21.5(@babel/core@7.22.5)
       '@babel/core': 7.22.5
@@ -30434,8 +30465,8 @@ snapshots:
       '@emotion/unitless': 0.8.1
       css-to-react-native: 3.2.0
       postcss: 8.4.31
-      react: 19.0.0-rc-7771d3a7-20240827
-      react-dom: 19.0.0-rc-7771d3a7-20240827(react@19.0.0-rc-7771d3a7-20240827)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
       shallowequal: 1.1.0
       stylis: 4.2.0
       tslib: 2.5.3
@@ -30447,10 +30478,10 @@ snapshots:
       postcss: 7.0.32
       postcss-load-plugins: 2.3.0
 
-  styled-jsx@5.1.6(@babel/core@7.22.5)(babel-plugin-macros@3.1.0)(react@19.0.0-rc-7771d3a7-20240827):
+  styled-jsx@5.1.6(@babel/core@7.22.5)(babel-plugin-macros@3.1.0)(react@18.3.1):
     dependencies:
       client-only: 0.0.1
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
     optionalDependencies:
       '@babel/core': 7.22.5
       babel-plugin-macros: 3.1.0
@@ -30540,11 +30571,11 @@ snapshots:
       picocolors: 1.0.1
       stable: 0.1.8
 
-  swr@2.2.4(react@19.0.0-rc-7771d3a7-20240827):
+  swr@2.2.4(react@18.3.1):
     dependencies:
       client-only: 0.0.1
-      react: 19.0.0-rc-7771d3a7-20240827
-      use-sync-external-store: 1.2.0(react@19.0.0-rc-7771d3a7-20240827)
+      react: 18.3.1
+      use-sync-external-store: 1.2.0(react@18.3.1)
 
   symbol-observable@1.0.1: {}
 
@@ -31229,9 +31260,9 @@ snapshots:
       unist-util-is: 5.2.0
       unist-util-visit-parents: 5.1.3
 
-  unistore@3.4.1(react@19.0.0-rc-7771d3a7-20240827):
+  unistore@3.4.1(react@18.3.1):
     optionalDependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   universal-github-app-jwt@1.1.1:
     dependencies:
@@ -31356,9 +31387,9 @@ snapshots:
     optionalDependencies:
       '@types/react': types-react@19.0.0-rc.0
 
-  use-sync-external-store@1.2.0(react@19.0.0-rc-7771d3a7-20240827):
+  use-sync-external-store@1.2.0(react@18.3.1):
     dependencies:
-      react: 19.0.0-rc-7771d3a7-20240827
+      react: 18.3.1
 
   use@3.1.1: {}
 
diff --git a/run-tests.js b/run-tests.js
index f1f00f88e64c11..35e34f65862767 100644
--- a/run-tests.js
+++ b/run-tests.js
@@ -18,9 +18,10 @@ const exec = promisify(execOrig)
 const core = require('@actions/core')
 const { getTestFilter } = require('./test/get-test-filter')
 
+// TODO: Base this off of test matrix
 // Do not rename or format. sync-react script relies on this line.
 // prettier-ignore
-const nextjsReactPeerVersion = "19.0.0-rc-7771d3a7-20240827";
+const nextjsReactPeerVersion = "^18.2.0";
 
 let argv = require('yargs/yargs')(process.argv.slice(2))
   .string('type')
diff --git a/test/.stats-app/package.json b/test/.stats-app/package.json
index 58cf2ed6c29fde..992116f073459f 100644
--- a/test/.stats-app/package.json
+++ b/test/.stats-app/package.json
@@ -4,8 +4,8 @@
   "license": "MIT",
   "dependencies": {
     "next": "latest",
-    "react": "19.0.0-rc-7771d3a7-20240827",
-    "react-dom": "19.0.0-rc-7771d3a7-20240827"
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   },
   "engines": {
     "node": ">=18.18.0"
diff --git a/test/development/acceptance/hydration-error-react-19.test.ts b/test/development/acceptance/hydration-error-react-19.test.ts
index 21ea0b97563a04..f1e5ae181acd57 100644
--- a/test/development/acceptance/hydration-error-react-19.test.ts
+++ b/test/development/acceptance/hydration-error-react-19.test.ts
@@ -4,7 +4,8 @@ import { FileRef, nextTestSetup } from 'e2e-utils'
 import { outdent } from 'outdent'
 import path from 'path'
 
-describe('Error overlay for hydration errors (React 19)', () => {
+// TODO: Enable once React 19 support is added to pages.
+describe.skip('Error overlay for hydration errors (React 19)', () => {
   const { next } = nextTestSetup({
     files: new FileRef(path.join(__dirname, 'fixtures', 'default-template')),
     skipStart: true,
diff --git a/test/development/acceptance/hydration-error.test.ts b/test/development/acceptance/hydration-error.test.ts
index af299cf5b52283..dfcb2c7dbc196a 100644
--- a/test/development/acceptance/hydration-error.test.ts
+++ b/test/development/acceptance/hydration-error.test.ts
@@ -4,8 +4,7 @@ import { FileRef, nextTestSetup } from 'e2e-utils'
 import { outdent } from 'outdent'
 import path from 'path'
 
-// TODO: Enable this test once react 18 is supported for pages router
-describe.skip('Error overlay for hydration errors (React 18)', () => {
+describe('Error overlay for hydration errors (React 18)', () => {
   const { next } = nextTestSetup({
     files: new FileRef(path.join(__dirname, 'fixtures', 'default-template')),
     dependencies: {
@@ -38,7 +37,7 @@ describe.skip('Error overlay for hydration errors (React 18)', () => {
     await session.assertHasRedbox()
 
     expect(await session.getRedboxDescription()).toMatchInlineSnapshot(`
-      "Error: Text content does not match server-rendered HTML.
+      "Text content does not match server-rendered HTML.
       See more info here: https://nextjs.org/docs/messages/react-hydration-error"
     `)
 
diff --git a/test/development/app-dir/ssr-in-rsc/ssr-in-rsc.test.ts b/test/development/app-dir/ssr-in-rsc/ssr-in-rsc.test.ts
index 2f38cf34080cbb..53fdb6b5772934 100644
--- a/test/development/app-dir/ssr-in-rsc/ssr-in-rsc.test.ts
+++ b/test/development/app-dir/ssr-in-rsc/ssr-in-rsc.test.ts
@@ -8,6 +8,7 @@ import {
 } from 'next-test-utils'
 
 const isReactExperimental = process.env.__NEXT_EXPERIMENTAL_PPR === 'true'
+const isReact18 = true
 
 describe('react-dom/server in React Server environment', () => {
   const dependencies = (global as any).isNextDeploy
@@ -317,23 +318,45 @@ describe('react-dom/server in React Server environment', () => {
       source: await getRedboxSource(browser),
     }
     if (isTurbopack) {
-      expect(redbox).toMatchInlineSnapshot(`
-        {
-          "description": "Error: react-dom/server is not supported in React Server Components.",
-          "source": "app/exports/app-code/react-dom-server-node-explicit/page.js (0:0) @ <unknown>
+      if (isReact18) {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher')",
+            "source": "app/exports/app-code/react-dom-server-node-explicit/page.js (0:0) @ <unknown>
 
-          1 | import * as ReactDOMServerNode from 'react-dom/server.node'
-          2 | // Fine to drop once React is on ESM
-          3 | import ReactDOMServerNodeDefault from 'react-dom/server.node'",
-        }
-      `)
+            1 | import * as ReactDOMServerNode from 'react-dom/server.node'
+            2 | // Fine to drop once React is on ESM
+            3 | import ReactDOMServerNodeDefault from 'react-dom/server.node'",
+          }
+        `)
+      } else {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "Error: react-dom/server is not supported in React Server Components.",
+            "source": "app/exports/app-code/react-dom-server-node-explicit/page.js (0:0) @ <unknown>
+  
+            1 | import * as ReactDOMServerNode from 'react-dom/server.node'
+            2 | // Fine to drop once React is on ESM
+            3 | import ReactDOMServerNodeDefault from 'react-dom/server.node'",
+          }
+        `)
+      }
     } else {
-      expect(redbox).toMatchInlineSnapshot(`
-        {
-          "description": "Error: react-dom/server is not supported in React Server Components.",
-          "source": null,
-        }
-      `)
+      if (isReact18) {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher')",
+            "source": null,
+          }
+        `)
+      } else {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "Error: react-dom/server is not supported in React Server Components.",
+            "source": null,
+          }
+        `)
+      }
     }
   })
 
@@ -404,23 +427,45 @@ describe('react-dom/server in React Server environment', () => {
       source: await getRedboxSource(browser),
     }
     if (isTurbopack) {
-      expect(redbox).toMatchInlineSnapshot(`
-        {
-          "description": "Error: react-dom/server is not supported in React Server Components.",
-          "source": "internal-pkg/server.node.js (0:0) @ <unknown>
+      if (isReact18) {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher')",
+            "source": "internal-pkg/server.node.js (0:0) @ <unknown>
 
-          1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
-          2 | // Fine to drop once React is on ESM
-          3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
-        }
-      `)
+            1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
+            2 | // Fine to drop once React is on ESM
+            3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
+          }
+        `)
+      } else {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "Error: react-dom/server is not supported in React Server Components.",
+            "source": "internal-pkg/server.node.js (0:0) @ <unknown>
+
+            1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
+            2 | // Fine to drop once React is on ESM
+            3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
+          }
+        `)
+      }
     } else {
-      expect(redbox).toMatchInlineSnapshot(`
-        {
+      if (isReact18) {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher')",
+            "source": null,
+          }
+        `)
+      } else {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
           "description": "Error: react-dom/server is not supported in React Server Components.",
-          "source": null,
-        }
-      `)
+            "source": null,
+          }
+        `)
+      }
     }
   })
 
@@ -501,26 +546,27 @@ describe('react-dom/server in React Server environment', () => {
           }"
         `)
       } else {
+        await assertNoRedbox(browser)
         expect(await browser.elementByCss('main').text())
           .toMatchInlineSnapshot(`
-          "{
-            "default": {
-              "default": [
-                "renderToReadableStream",
-                "renderToStaticMarkup",
-                "renderToString",
-                "version"
-              ],
-              "named": [
-                "default",
-                "renderToReadableStream",
-                "renderToStaticMarkup",
-                "renderToString",
-                "version"
-              ]
-            }
-          }"
-        `)
+            "{
+              "default": {
+                "default": [
+                  "renderToReadableStream",
+                  "renderToStaticMarkup",
+                  "renderToString",
+                  "version"
+                ],
+                "named": [
+                  "default",
+                  "renderToReadableStream",
+                  "renderToStaticMarkup",
+                  "renderToString",
+                  "version"
+                ]
+              }
+            }"
+          `)
       }
     }
     const redbox = {
@@ -675,23 +721,45 @@ describe('react-dom/server in React Server environment', () => {
       source: await getRedboxSource(browser),
     }
     if (isTurbopack) {
-      expect(redbox).toMatchInlineSnapshot(`
-        {
-          "description": "Error: react-dom/server is not supported in React Server Components.",
-          "source": "internal-pkg/server.node.js (0:0) @ <unknown>
+      if (isReact18) {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher')",
+            "source": "internal-pkg/server.node.js (0:0) @ <unknown>
 
-          1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
-          2 | // Fine to drop once React is on ESM
-          3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
-        }
-      `)
+            1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
+            2 | // Fine to drop once React is on ESM
+            3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
+          }
+        `)
+      } else {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "Error: react-dom/server is not supported in React Server Components.",
+            "source": "internal-pkg/server.node.js (0:0) @ <unknown>
+
+            1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
+            2 | // Fine to drop once React is on ESM
+            3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
+          }
+        `)
+      }
     } else {
-      expect(redbox).toMatchInlineSnapshot(`
-        {
-          "description": "Error: react-dom/server is not supported in React Server Components.",
-          "source": null,
-        }
-      `)
+      if (isReact18) {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher')",
+            "source": null,
+          }
+        `)
+      } else {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "Error: react-dom/server is not supported in React Server Components.",
+            "source": null,
+          }
+        `)
+      }
     }
   })
 
@@ -707,23 +775,45 @@ describe('react-dom/server in React Server environment', () => {
     }
 
     if (isTurbopack) {
-      expect(redbox).toMatchInlineSnapshot(`
-        {
-          "description": "Error: react-dom/server is not supported in React Server Components.",
-          "source": "internal-pkg/server.node.js (0:0) @ <unknown>
+      if (isReact18) {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher')",
+            "source": "internal-pkg/server.node.js (0:0) @ <unknown>
 
-          1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
-          2 | // Fine to drop once React is on ESM
-          3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
-        }
-      `)
+            1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
+            2 | // Fine to drop once React is on ESM
+            3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
+          }
+        `)
+      } else {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "Error: react-dom/server is not supported in React Server Components.",
+            "source": "internal-pkg/server.node.js (0:0) @ <unknown>
+
+            1 | import * as ReactDOMServerEdge from 'react-dom/server.node'
+            2 | // Fine to drop once React is on ESM
+            3 | import ReactDOMServerEdgeDefault from 'react-dom/server.node'",
+          }
+        `)
+      }
     } else {
-      expect(redbox).toMatchInlineSnapshot(`
-        {
-          "description": "Error: react-dom/server is not supported in React Server Components.",
-          "source": null,
-        }
-      `)
+      if (isReact18) {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher')",
+            "source": null,
+          }
+        `)
+      } else {
+        expect(redbox).toMatchInlineSnapshot(`
+          {
+            "description": "Error: react-dom/server is not supported in React Server Components.",
+            "source": null,
+          }
+        `)
+      }
     }
   })
 })
diff --git a/test/development/basic/hmr.test.ts b/test/development/basic/hmr.test.ts
index 3dad5302c2cb82..b065a1af3b0412 100644
--- a/test/development/basic/hmr.test.ts
+++ b/test/development/basic/hmr.test.ts
@@ -18,6 +18,8 @@ import { NextInstance } from 'e2e-utils'
 import { outdent } from 'outdent'
 import type { NextConfig } from 'next'
 
+const isReact18 = true
+
 describe.each([
   { basePath: '', assetPrefix: '' },
   { basePath: '', assetPrefix: '/asset-prefix' },
@@ -41,11 +43,14 @@ describe.each([
     })
     await retry(async () => {
       const logs = await browser.log()
+
       expect(logs).toEqual(
         expect.arrayContaining([
           {
             message: expect.stringContaining(
-              'https://react.dev/link/hydration-mismatch'
+              isReact18
+                ? 'https://nextjs.org/docs/messages/react-hydration-error'
+                : 'https://react.dev/link/hydration-mismatch'
             ),
             source: 'error',
           },
diff --git a/test/development/pages-dir/client-navigation/index.test.ts b/test/development/pages-dir/client-navigation/index.test.ts
index 80b50b9195f413..6627edda91db46 100644
--- a/test/development/pages-dir/client-navigation/index.test.ts
+++ b/test/development/pages-dir/client-navigation/index.test.ts
@@ -13,6 +13,8 @@ import webdriver from 'next-webdriver'
 import path from 'path'
 import { nextTestSetup } from 'e2e-utils'
 
+const isReact18 = true
+
 describe('Client Navigation', () => {
   const { next } = nextTestSetup({
     files: path.join(__dirname, 'fixture'),
@@ -1669,19 +1671,19 @@ describe.each([[false], [true]])(
         expect(
           Number(await browser.eval('window.__test_async_executions'))
         ).toBe(
-          strictNextHead
+          strictNextHead || isReact18
             ? 1
             : // <meta name="next-head-count" /> is floated before <script />.
-              // head-manager thinks it needs t add these again resulting in another execution.
+              // head-manager thinks it needs to add these again resulting in another execution.
               2
         )
         expect(
           Number(await browser.eval('window.__test_defer_executions'))
         ).toBe(
-          strictNextHead
+          strictNextHead || isReact18
             ? 1
             : // <meta name="next-head-count" /> is floated before <script defer />.
-              // head-manager thinks it needs t add these again resulting in another execution.
+              // head-manager thinks it needs to add these again resulting in another execution.
               2
         )
 
@@ -1690,20 +1692,20 @@ describe.each([[false], [true]])(
 
         expect(
           Number(await browser.eval('window.__test_async_executions'))
-        ).toBe(strictNextHead ? 1 : 2)
+        ).toBe(strictNextHead || isReact18 ? 1 : 2)
         expect(
           Number(await browser.eval('window.__test_defer_executions'))
-        ).toBe(strictNextHead ? 1 : 2)
+        ).toBe(strictNextHead || isReact18 ? 1 : 2)
 
         await browser.elementByCss('#toggleScript').click()
         await waitFor(2000)
 
         expect(
           Number(await browser.eval('window.__test_async_executions'))
-        ).toBe(strictNextHead ? 1 : 2)
+        ).toBe(strictNextHead || isReact18 ? 1 : 2)
         expect(
           Number(await browser.eval('window.__test_defer_executions'))
-        ).toBe(strictNextHead ? 1 : 2)
+        ).toBe(strictNextHead || isReact18 ? 1 : 2)
       } finally {
         if (browser) {
           await browser.close()
diff --git a/test/development/pages-dir/client-navigation/rendering.test.ts b/test/development/pages-dir/client-navigation/rendering.test.ts
index 8e407a877e1217..ac3f040dd127ea 100644
--- a/test/development/pages-dir/client-navigation/rendering.test.ts
+++ b/test/development/pages-dir/client-navigation/rendering.test.ts
@@ -609,7 +609,11 @@ describe.each([[false], [true]])(
       const documentHeadElement =
         '<meta name="keywords" content="document head test"/>'
 
-      expect(html).toContain(`<head>${nextHeadElement}${documentHeadElement}`)
+      // charset is not actually at the top.
+      // data-next-hide-fouc comes first
+      expect(html).toContain(
+        `</style></noscript>${nextHeadElement}${documentHeadElement}`
+      )
     })
   }
 )
diff --git a/test/e2e/app-dir/rsc-basic/rsc-basic.test.ts b/test/e2e/app-dir/rsc-basic/rsc-basic.test.ts
index c72afdc0f2a09b..14272d386e341b 100644
--- a/test/e2e/app-dir/rsc-basic/rsc-basic.test.ts
+++ b/test/e2e/app-dir/rsc-basic/rsc-basic.test.ts
@@ -486,8 +486,7 @@ describe('app dir - rsc basics', () => {
   const bundledReactVersionPattern =
     process.env.__NEXT_EXPERIMENTAL_PPR === 'true' ? '-experimental-' : '-rc-'
 
-  // TODO: (React 19) During Beta, bundled and installed version match.
-  it.skip('should not use bundled react for pages with app', async () => {
+  it('should not use bundled react for pages with app', async () => {
     const ssrPaths = ['/pages-react', '/edge-pages-react']
     const promises = ssrPaths.map(async (pathname) => {
       const resPages$ = await next.render$(pathname)
@@ -507,7 +506,6 @@ describe('app dir - rsc basics', () => {
     const ssrAppReactVersions = [
       await resApp$('#react').text(),
       await resApp$('#react-dom').text(),
-      await resApp$('#react-dom-server').text(),
     ]
 
     ssrAppReactVersions.forEach((version) =>
diff --git a/test/e2e/next-test/first-time-setup-js/package.json b/test/e2e/next-test/first-time-setup-js/package.json
index a135b40a27c11b..8e949d122db4b6 100644
--- a/test/e2e/next-test/first-time-setup-js/package.json
+++ b/test/e2e/next-test/first-time-setup-js/package.json
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "next": "canary",
-    "react": "19.0.0-rc-7771d3a7-20240827",
-    "react-dom": "19.0.0-rc-7771d3a7-20240827"
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   }
 }
diff --git a/test/e2e/next-test/first-time-setup-ts/package.json b/test/e2e/next-test/first-time-setup-ts/package.json
index 107dfe0c5b5f70..d85d37ff59ee1d 100644
--- a/test/e2e/next-test/first-time-setup-ts/package.json
+++ b/test/e2e/next-test/first-time-setup-ts/package.json
@@ -8,8 +8,8 @@
   },
   "dependencies": {
     "next": "canary",
-    "react": "19.0.0-rc-7771d3a7-20240827",
-    "react-dom": "19.0.0-rc-7771d3a7-20240827"
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   },
   "devDependencies": {
     "@types/react": "^18",
diff --git a/test/e2e/prerender-native-module.test.ts b/test/e2e/prerender-native-module.test.ts
index 55d89295b02874..ef78015125e748 100644
--- a/test/e2e/prerender-native-module.test.ts
+++ b/test/e2e/prerender-native-module.test.ts
@@ -3,6 +3,8 @@ import { createNext, FileRef } from 'e2e-utils'
 import { NextInstance } from 'e2e-utils'
 import webdriver from 'next-webdriver'
 
+const isReact18 = true
+
 describe('prerender native module', () => {
   let next: NextInstance
 
@@ -70,7 +72,9 @@ describe('prerender native module', () => {
             /webpack-runtime\.js/,
             /node_modules\/react\/index\.js/,
             /node_modules\/react\/package\.json/,
-            /node_modules\/react\/cjs\/react\.production\.js/,
+            isReact18
+              ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+              : /node_modules\/react\/cjs\/react\.production\.js/,
           ],
           notTests: [],
         },
@@ -80,7 +84,9 @@ describe('prerender native module', () => {
             /webpack-runtime\.js/,
             /node_modules\/react\/index\.js/,
             /node_modules\/react\/package\.json/,
-            /node_modules\/react\/cjs\/react\.production\.js/,
+            isReact18
+              ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+              : /node_modules\/react\/cjs\/react\.production\.js/,
             /node_modules\/sqlite3\/.*?\.js/,
             /node_modules\/sqlite3\/.*?\.node/,
             /node_modules\/sqlite\/.*?\.js/,
diff --git a/test/e2e/prerender.test.ts b/test/e2e/prerender.test.ts
index 4b426406c1b098..5d60ccc2ae7592 100644
--- a/test/e2e/prerender.test.ts
+++ b/test/e2e/prerender.test.ts
@@ -19,6 +19,8 @@ import {
 import webdriver from 'next-webdriver'
 import stripAnsi from 'strip-ansi'
 
+const isReact18 = true
+
 describe('Prerender', () => {
   let next: NextInstance
 
@@ -2062,7 +2064,9 @@ describe('Prerender', () => {
               /webpack-runtime\.js/,
               /node_modules\/react\/index\.js/,
               /node_modules\/react\/package\.json/,
-              /node_modules\/react\/cjs\/react\.production\.js/,
+              isReact18
+                ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+                : /node_modules\/react\/cjs\/react\.production\.js/,
             ],
             notTests: [],
           },
@@ -2073,7 +2077,9 @@ describe('Prerender', () => {
               /chunks\/.*?\.js/,
               /node_modules\/react\/index\.js/,
               /node_modules\/react\/package\.json/,
-              /node_modules\/react\/cjs\/react\.production\.js/,
+              isReact18
+                ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+                : /node_modules\/react\/cjs\/react\.production\.js/,
               /\/world.txt/,
             ],
             notTests: [
@@ -2088,7 +2094,9 @@ describe('Prerender', () => {
               /chunks\/.*?\.js/,
               /node_modules\/react\/index\.js/,
               /node_modules\/react\/package\.json/,
-              /node_modules\/react\/cjs\/react\.production\.js/,
+              isReact18
+                ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+                : /node_modules\/react\/cjs\/react\.production\.js/,
               /node_modules\/@firebase\/firestore\/.*?\.js/,
             ],
             notTests: [/\/world.txt/],
@@ -2109,7 +2117,7 @@ describe('Prerender', () => {
               )
             )
           } catch (error) {
-            error.message += `\n\nFiles:\n${files.join('\n')}`
+            error.message += `\n\nPage: ${check.page}\nFiles:\n${files.join('\n')}`
             throw error
           }
 
diff --git a/test/integration/amphtml/test/index.test.js b/test/integration/amphtml/test/index.test.js
index 252854df6949a2..f44aa7ffb5a99f 100644
--- a/test/integration/amphtml/test/index.test.js
+++ b/test/integration/amphtml/test/index.test.js
@@ -30,10 +30,6 @@ describe('AMP Usage', () => {
     let output = ''
 
     beforeAll(async () => {
-      await rename(
-        join(appDir, 'pages/custom-scripts.js'),
-        join(appDir, 'pages/custom-scripts.js.bak')
-      )
       await rename(
         join(appDir, 'pages/invalid-amp.js'),
         join(appDir, 'pages/invalid-amp.js.bak')
@@ -49,10 +45,6 @@ describe('AMP Usage', () => {
       app = await nextStart(appDir, context.appPort)
     })
     afterAll(async () => {
-      await rename(
-        join(appDir, 'pages/custom-scripts.js.bak'),
-        join(appDir, 'pages/custom-scripts.js')
-      )
       await rename(
         join(appDir, 'pages/invalid-amp.js.bak'),
         join(appDir, 'pages/invalid-amp.js')
@@ -565,25 +557,6 @@ describe('AMP Usage', () => {
         expect(inspectPayload).toContain('error')
       })
 
-      it('should detect amp validator warning on custom scripts', async () => {
-        let inspectPayload = ''
-        dynamicAppPort = await findPort()
-        ampDynamic = await launchApp(join(__dirname, '../'), dynamicAppPort, {
-          onStdout(msg) {
-            inspectPayload += msg
-          },
-          onStderr(msg) {
-            inspectPayload += msg
-          },
-        })
-
-        await renderViaHTTP(dynamicAppPort, '/custom-scripts')
-
-        await killApp(ampDynamic)
-
-        expect(inspectPayload).toContain('error')
-      })
-
       // eslint-disable-next-line jest/no-identical-title
       it('should not contain missing files warning', async () => {
         expect(output).toContain('Compiled /only-amp')
diff --git a/test/integration/auto-export/test/index.test.js b/test/integration/auto-export/test/index.test.js
index e90f76052c129a..6c3b87c089c258 100644
--- a/test/integration/auto-export/test/index.test.js
+++ b/test/integration/auto-export/test/index.test.js
@@ -15,6 +15,8 @@ const appDir = path.join(__dirname, '..')
 let appPort
 let app
 
+const isReact18 = true
+
 const runTests = () => {
   it('Supports commonjs 1', async () => {
     const browser = await webdriver(appPort, '/commonjs1')
@@ -99,7 +101,19 @@ describe('Auto Export', () => {
         expect.arrayContaining([
           {
             message: expect.stringContaining(
-              'https://react.dev/link/hydration-mismatch'
+              'See more info here: https://nextjs.org/docs/messages/react-hydration-error'
+            ),
+            source: 'error',
+          },
+        ])
+      )
+      expect(logs).toEqual(
+        expect.arrayContaining([
+          {
+            message: expect.stringContaining(
+              isReact18
+                ? 'https://nextjs.org/docs/messages/react-hydration-error'
+                : 'https://react.dev/link/hydration-mismatch'
             ),
             source: 'error',
           },
diff --git a/test/integration/link-ref/app/layout.js b/test/integration/link-ref/app/layout.js
new file mode 100644
index 00000000000000..8525f5f8c0b2a1
--- /dev/null
+++ b/test/integration/link-ref/app/layout.js
@@ -0,0 +1,12 @@
+export const metadata = {
+  title: 'Next.js',
+  description: 'Generated by Next.js',
+}
+
+export default function RootLayout({ children }) {
+  return (
+    <html lang="en">
+      <body>{children}</body>
+    </html>
+  )
+}
diff --git a/test/integration/module-id-strategies/components/CustomComponent.tsx b/test/integration/module-id-strategies/components/CustomComponent.tsx
index 279e4861a926db..3396ee90bbeeb8 100644
--- a/test/integration/module-id-strategies/components/CustomComponent.tsx
+++ b/test/integration/module-id-strategies/components/CustomComponent.tsx
@@ -1,6 +1,6 @@
 import React from 'react'
 
-async function CustomComponent() {
+function CustomComponent() {
   return (
     <div>
       <h1>the content of a dynamic component</h1>
diff --git a/test/integration/next-image-new/default/test/index.test.ts b/test/integration/next-image-new/default/test/index.test.ts
index 26b604c394de67..58a69270958061 100644
--- a/test/integration/next-image-new/default/test/index.test.ts
+++ b/test/integration/next-image-new/default/test/index.test.ts
@@ -1180,7 +1180,7 @@ function runTests(mode) {
 
       expect(warnings).toEqual([])
 
-      expect(await browser.elementById('img').getAttribute('src')).toBe(null)
+      expect(await browser.elementById('img').getAttribute('src')).toBe('')
       expect(await browser.elementById('img').getAttribute('srcset')).toBe(null)
       expect(await browser.elementById('img').getAttribute('width')).toBe('200')
       expect(await browser.elementById('img').getAttribute('height')).toBe(
@@ -1195,7 +1195,7 @@ function runTests(mode) {
       )
       expect(warnings).toEqual([])
 
-      expect(await browser.elementById('img').getAttribute('src')).toBe(null)
+      expect(await browser.elementById('img').getAttribute('src')).toBe('')
       expect(await browser.elementById('img').getAttribute('srcset')).toBe(null)
       expect(await browser.elementById('img').getAttribute('width')).toBe('200')
       expect(await browser.elementById('img').getAttribute('height')).toBe(
diff --git a/test/integration/react-current-version/test/index.test.js b/test/integration/react-current-version/test/index.test.js
index 50638dcb928e56..c2a57fe80a4ad6 100644
--- a/test/integration/react-current-version/test/index.test.js
+++ b/test/integration/react-current-version/test/index.test.js
@@ -32,7 +32,7 @@ describe('Basics', () => {
       const browser = await webdriver(context.appPort, '/')
       expect(await browser.eval('window.didHydrate')).toBe(true)
       expect(await browser.elementById('react-dom-version').text()).toMatch(
-        /19/
+        /18/
       )
     })
 
diff --git a/test/lib/next-modes/base.ts b/test/lib/next-modes/base.ts
index 2797fa63a0cc93..3eecaba4be75e0 100644
--- a/test/lib/next-modes/base.ts
+++ b/test/lib/next-modes/base.ts
@@ -49,9 +49,10 @@ type OmitFirstArgument<F> = F extends (
   ? (...args: P) => R
   : never
 
+// TODO: Base this off of test matrix
 // Do not rename or format. sync-react script relies on this line.
 // prettier-ignore
-const nextjsReactPeerVersion = "19.0.0-rc-7771d3a7-20240827";
+const nextjsReactPeerVersion = "^18.2.0";
 
 export class NextInstance {
   protected files: FileRef | { [filename: string]: string | FileRef }
diff --git a/test/production/custom-server/custom-server.test.ts b/test/production/custom-server/custom-server.test.ts
index aa287fdd192700..cc860b8cb24430 100644
--- a/test/production/custom-server/custom-server.test.ts
+++ b/test/production/custom-server/custom-server.test.ts
@@ -28,7 +28,7 @@ describe('custom server', () => {
 
     it('should render pages with installed react', async () => {
       const $ = await next.render$(`/2`)
-      expect($('body').text()).toMatch(/pages: 19.0.0/)
+      expect($('body').text()).toMatch(/pages: 18\.\d+\.\d+\{/)
     })
   })
 })
diff --git a/test/production/pages-dir/production/test/index.test.ts b/test/production/pages-dir/production/test/index.test.ts
index 8d16e87cdbe457..98b4b50e828dd3 100644
--- a/test/production/pages-dir/production/test/index.test.ts
+++ b/test/production/pages-dir/production/test/index.test.ts
@@ -29,6 +29,8 @@ if (process.env.TEST_WASM) {
   jest.setTimeout(120 * 1000)
 }
 
+const isReact18 = true
+
 describe('Production Usage', () => {
   const { next } = nextTestSetup({
     files: path.join(__dirname, '../fixture'),
@@ -181,7 +183,9 @@ describe('Production Usage', () => {
           /webpack-runtime\.js/,
           /node_modules\/react\/index\.js/,
           /node_modules\/react\/package\.json/,
-          /node_modules\/react\/cjs\/react\.production\.js/,
+          isReact18
+            ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+            : /node_modules\/react\/cjs\/react\.production\.js/,
         ],
         notTests: [/\0/, /\?/, /!/],
       },
@@ -192,7 +196,9 @@ describe('Production Usage', () => {
           /chunks\/.*?\.js/,
           /node_modules\/react\/index\.js/,
           /node_modules\/react\/package\.json/,
-          /node_modules\/react\/cjs\/react\.production\.js/,
+          isReact18
+            ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+            : /node_modules\/react\/cjs\/react\.production\.js/,
           /node_modules\/next/,
         ],
         notTests: [/\0/, /\?/, /!/],
@@ -204,7 +210,9 @@ describe('Production Usage', () => {
           /chunks\/.*?\.js/,
           /node_modules\/react\/index\.js/,
           /node_modules\/react\/package\.json/,
-          /node_modules\/react\/cjs\/react\.production\.js/,
+          isReact18
+            ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+            : /node_modules\/react\/cjs\/react\.production\.js/,
           /node_modules\/next/,
           /node_modules\/nanoid\/index\.js/,
           /node_modules\/nanoid\/url-alphabet\/index\.js/,
@@ -219,7 +227,9 @@ describe('Production Usage', () => {
           /chunks\/.*?\.js/,
           /node_modules\/react\/index\.js/,
           /node_modules\/react\/package\.json/,
-          /node_modules\/react\/cjs\/react\.production\.js/,
+          isReact18
+            ? /node_modules\/react\/cjs\/react\.production\.min\.js/
+            : /node_modules\/react\/cjs\/react\.production\.js/,
           /node_modules\/next/,
         ],
         notTests: [