diff --git a/cli/CHANGELOG.md b/cli/CHANGELOG.md
index 4245aefcf5c..e485be121ef 100644
--- a/cli/CHANGELOG.md
+++ b/cli/CHANGELOG.md
@@ -1,8 +1,12 @@
 <!-- See the ../guides/writing-the-cypress-changelog.md for details on writing the changelog. -->
-## 15.3.1
+## 15.4.0
 
 _Released 10/07/2025 (PENDING)_
 
+**Features:**
+
+- Added the `--posix-exit-codes` flag for the `run` command. When this flag is passed, Cypress will exit with 1 if any tests fail, rather than the number of failed tests. Addresses [#32605](https://github.com/cypress-io/cypress/issues/32605) and [#24695](https://github.com/cypress-io/cypress/issues/24695). Addressed in [#32609](https://github.com/cypress-io/cypress/pull/32609).
+
 **Bugfixes:**
 
 - Fixed a regression introduced in [`15.0.0`](https://docs.cypress.io/guides/references/changelog#15-0-0) where `dbus` connection error messages appear in docker containers when launching Cypress. Fixes [#32290](https://github.com/cypress-io/cypress/issues/32290).
diff --git a/cli/lib/cli.ts b/cli/lib/cli.ts
index cd4d05f81e6..199ca7865c4 100644
--- a/cli/lib/cli.ts
+++ b/cli/lib/cli.ts
@@ -127,6 +127,7 @@ const descriptions: any = {
   parallel: 'enables concurrent runs and automatic load balancing of specs across multiple machines or processes',
   port: 'runs Cypress on a specific port. overrides any value in cypress.config.{js,ts,mjs,cjs}.',
   project: 'path to the project',
+  posixExitCodes: 'use POSIX exit codes for error handling',
   quiet: 'run quietly, using only the configured reporter',
   record: 'records the run. sends test results, screenshots and videos to Cypress Cloud.',
   reporter: 'runs a specific mocha reporter. pass a path to use a custom reporter. defaults to "spec"',
@@ -259,6 +260,7 @@ const addCypressRunCommand = (program: any): any => {
   .option('--parallel', text('parallel'))
   .option('-p, --port <port>', text('port'))
   .option('-P, --project <project-path>', text('project'))
+  .option('--posix-exit-codes', text('posixExitCodes'))
   .option('-q, --quiet', text('quiet'))
   .option('--record [bool]', text('record'), coerceFalse)
   .option('-r, --reporter <reporter>', text('reporter'))
diff --git a/cli/lib/exec/run.ts b/cli/lib/exec/run.ts
index 577118aed52..bf295b8bf2e 100644
--- a/cli/lib/exec/run.ts
+++ b/cli/lib/exec/run.ts
@@ -110,6 +110,10 @@ const processRunOptions = (options: any = {}): string[] => {
     args.push('--parallel')
   }
 
+  if (options.posixExitCodes) {
+    args.push('--posix-exit-codes')
+  }
+
   if (options.port) {
     args.push('--port', options.port)
   }
diff --git a/cli/lib/util.ts b/cli/lib/util.ts
index 5794312dba6..0224842e9e2 100644
--- a/cli/lib/util.ts
+++ b/cli/lib/util.ts
@@ -201,6 +201,7 @@ const parseOpts = (opts: any): any => {
     'path',
     'parallel',
     'port',
+    'posixExitCodes',
     'project',
     'quiet',
     'reporter',
@@ -449,7 +450,7 @@ const util = {
 
     async function _getRealArch (): Promise<string> {
       const osPlatform = os.platform()
-      // eslint-disable-next-line no-restricted-syntax
+
       const osArch = os.arch()
 
       debug('detecting arch %o', { osPlatform, osArch })
@@ -474,7 +475,6 @@ const util = {
         if (['aarch64_be', 'aarch64', 'armv8b', 'armv8l'].includes(stdout)) return 'arm64'
       }
 
-      // eslint-disable-next-line no-restricted-syntax
       const pkgArch = arch()
 
       if (pkgArch === 'x86') return 'ia32'
diff --git a/cli/test/lib/__snapshots__/cli.spec.ts.snap b/cli/test/lib/__snapshots__/cli.spec.ts.snap
index dab8ac6a9d4..af9c3a3dff0 100644
--- a/cli/test/lib/__snapshots__/cli.spec.ts.snap
+++ b/cli/test/lib/__snapshots__/cli.spec.ts.snap
@@ -538,6 +538,7 @@ exports[`cli > unknown option > shows help for run command 1`] = `
     --parallel                                                  enables concurrent runs and automatic load balancing of specs across multiple machines or processes
     -p, --port <port>                                           runs Cypress on a specific port. overrides any value in cypress.config.{js,ts,mjs,cjs}.
     -P, --project <project-path>                                path to the project
+    --posix-exit-codes                                          use POSIX exit codes for error handling
     -q, --quiet                                                 run quietly, using only the configured reporter
     --record [bool]                                             records the run. sends test results, screenshots and videos to Cypress Cloud.
     -r, --reporter <reporter>                                   runs a specific mocha reporter. pass a path to use a custom reporter. defaults to "spec"
diff --git a/cli/test/lib/cli.spec.ts b/cli/test/lib/cli.spec.ts
index 3b4ee7dcc3a..53506b88fb9 100644
--- a/cli/test/lib/cli.spec.ts
+++ b/cli/test/lib/cli.spec.ts
@@ -651,6 +651,11 @@ describe('cli', () => {
       expect(run.start).toBeCalledWith({ runnerUi: false })
     })
 
+    it('calls run with --posix-exit-codes', async () => {
+      await exec('run --posix-exit-codes')
+      expect(run.start).toBeCalledWith({ posixExitCodes: true })
+    })
+
     describe('component-testing', () => {
       it('passes to run.start the correct args for component-testing', async () => {
         await exec('run --component --dev')
diff --git a/cli/test/lib/exec/run.spec.ts b/cli/test/lib/exec/run.spec.ts
index da705967071..35cdf242118 100644
--- a/cli/test/lib/exec/run.spec.ts
+++ b/cli/test/lib/exec/run.spec.ts
@@ -142,6 +142,10 @@ describe('exec run', () => {
     it('throws if --config-file is false', () => {
       expect(() => run.processRunOptions({ configFile: 'false' })).toThrow()
     })
+
+    it('adds --posix-exit-codes', () => {
+      expect(run.processRunOptions({ posixExitCodes: true })).toEqual(expect.arrayContaining(['--posix-exit-codes']))
+    })
   })
 
   describe('.start', () => {
diff --git a/cli/types/cypress-npm-api.d.ts b/cli/types/cypress-npm-api.d.ts
index 2181f864000..3d613dae5db 100644
--- a/cli/types/cypress-npm-api.d.ts
+++ b/cli/types/cypress-npm-api.d.ts
@@ -68,6 +68,10 @@ declare namespace CypressCommandLine {
      * Override default port
      */
     port: number
+    /**
+     * Use POSIX exit codes for error handling
+     */
+    posixExitCodes: boolean
     /**
      * Run quietly, using only the configured reporter
      */
diff --git a/packages/server/lib/cypress.ts b/packages/server/lib/cypress.ts
index 427b6abeb5e..a6d06a0b6aa 100644
--- a/packages/server/lib/cypress.ts
+++ b/packages/server/lib/cypress.ts
@@ -266,6 +266,10 @@ export = {
             }
           }
 
+          if (options.posixExitCodes) {
+            return results.totalFailed ? 1 : 0
+          }
+
           return results.totalFailed
         })
         .then(exit)
diff --git a/packages/server/lib/util/args.js b/packages/server/lib/util/args.js
index f948f709c82..014e4234e7f 100644
--- a/packages/server/lib/util/args.js
+++ b/packages/server/lib/util/args.js
@@ -37,6 +37,7 @@ const allowList = [
   'parallel',
   'ping',
   'port',
+  'posixExitCodes',
   'project',
   'proxySource',
   'quiet',
@@ -366,6 +367,7 @@ module.exports = {
       'run-project': 'runProject',
       'smoke-test': 'smokeTest',
       'testing-type': 'testingType',
+      'posix-exit-codes': 'posixExitCodes',
     }
 
     // takes an array of args and converts
diff --git a/packages/types/src/modeOptions.ts b/packages/types/src/modeOptions.ts
index f12a99399f2..213a0b56f29 100644
--- a/packages/types/src/modeOptions.ts
+++ b/packages/types/src/modeOptions.ts
@@ -25,6 +25,7 @@ export interface RunModeOptions extends CommonModeOptions {
   ciBuildId?: string | null
   tag?: (string)[] | null
   isBrowserGivenByCli: boolean
+  posixExitCodes?: boolean | null
 }
 
 export type TestingType = 'e2e' | 'component'
diff --git a/system-tests/lib/system-tests.ts b/system-tests/lib/system-tests.ts
index 82dd6c4af30..217d1ad62bb 100644
--- a/system-tests/lib/system-tests.ts
+++ b/system-tests/lib/system-tests.ts
@@ -238,6 +238,10 @@ type ExecOptions = {
    * Run Cypress with a custom user node version.
    */
   userNodeVersion?: string
+  /**
+   * Run Cypress with POSIX exit codes.
+   */
+  posixExitCodes?: boolean
 }
 
 type Server = {
@@ -764,6 +768,12 @@ const systemTests = {
       args.push(`--userNodeVersion=${options.userNodeVersion}`)
     }
 
+    debug('posixExitCodes', options.posixExitCodes)
+
+    if (options.posixExitCodes) {
+      args.push('--posix-exit-codes')
+    }
+
     return args
   },
 
diff --git a/system-tests/test/posix_exit_codes_spec.ts b/system-tests/test/posix_exit_codes_spec.ts
new file mode 100644
index 00000000000..bf67ffe50c4
--- /dev/null
+++ b/system-tests/test/posix_exit_codes_spec.ts
@@ -0,0 +1,37 @@
+import systemTests from '../lib/system-tests'
+
+describe('posix exit codes', () => {
+  systemTests.setup()
+
+  describe('when posix exit codes are enabled', () => {
+    const posixExitCodes = true
+
+    systemTests.it('returns 1 when there are multiple failing tests', {
+      spec: 'simple_failing.cy.js',
+      posixExitCodes,
+      expectedExitCode: 1,
+      browser: ['electron'],
+      project: 'e2e',
+    })
+
+    systemTests.it('returns 0 when there are no failing tests', {
+      spec: 'simple_passing.cy.js',
+      posixExitCodes: true,
+      expectedExitCode: 0,
+      browser: ['electron'],
+      project: 'e2e',
+    })
+  })
+
+  describe('when posix exit codes are disabled', () => {
+    const posixExitCodes = false
+
+    systemTests.it('returns 2 when there are 2 failing tests', {
+      spec: 'simple_failing.cy.js',
+      posixExitCodes,
+      expectedExitCode: 2,
+      browser: ['electron'],
+      project: 'e2e',
+    })
+  })
+})