diff --git a/cli/CHANGELOG.md b/cli/CHANGELOG.md
index b6f1a1d2e274..3a0a5a3a5455 100644
--- a/cli/CHANGELOG.md
+++ b/cli/CHANGELOG.md
@@ -6,6 +6,7 @@ _Released 7/2/2024 (PENDING)_
 **Bugfixes:**
 
 - Fixed an issue where Firefox 129 (Firefox Nightly) would not launch with Cypress. Fixes [#29713](https://github.com/cypress-io/cypress/issues/29713). Fixed in [#29720](https://github.com/cypress-io/cypress/pull/29720).
+- Specs with () in the filename will no longer fail to load and now behave as any other spec when run with the `--spec` argument via `cypress run`. Fixes [#28509](https://github.com/cypress-io/cypress/issues/28509).
 
 **Dependency Updates:**
 
@@ -117,7 +118,7 @@ _Released 4/23/2024_
 
 - Fixed a regression introduced in [`13.6.0`](https://docs.cypress.io/guides/references/changelog#13-6-0) where Cypress would occasionally exit with status code 1, even when a test run was successful, due to an unhandled WebSocket exception (`Error: WebSocket connection closed`). Addresses [#28523](https://github.com/cypress-io/cypress/issues/28523).
 - Fixed an issue where Cypress would hang on some commands when an invalid `timeout` option was provided. Fixes [#29323](https://github.com/cypress-io/cypress/issues/29323).
-
+ 
 **Misc:**
 
 - `.its()` type now excludes null and undefined. Fixes [#28872](https://github.com/cypress-io/cypress/issues/28872).
diff --git a/packages/server/lib/util/args.js b/packages/server/lib/util/args.js
index f948f709c82e..4729b24e335f 100644
--- a/packages/server/lib/util/args.js
+++ b/packages/server/lib/util/args.js
@@ -234,6 +234,17 @@ const parseSpecArgv = (pattern) => {
     ]
   }
 
+  // Split the path into directory and file name
+  const lastSlashIndex = pattern.lastIndexOf('/')
+  const directoryPath = pattern.substring(0, lastSlashIndex + 1)
+  const fileName = pattern.substring(lastSlashIndex + 1)
+
+  // Escape the parentheses in the file name
+  const escapedFileName = fileName.replace(/[()]/g, '\\$&')
+
+  // Recombine the directory path and escaped file name
+  pattern = directoryPath + escapedFileName
+
   /**
    * Sanitizes a path's leftover commas.
    *
diff --git a/packages/server/test/unit/util/args_spec.js b/packages/server/test/unit/util/args_spec.js
index ff7e1ba4af00..c930ad590bae 100644
--- a/packages/server/test/unit/util/args_spec.js
+++ b/packages/server/test/unit/util/args_spec.js
@@ -216,6 +216,13 @@ describe('lib/util/args', () => {
       expect(options.spec[2]).to.eq(`${getCwd()}/cypress/integration/foo2/bar/baz/test.ts`)
       expect(options.spec[3]).to.eq(`${getCwd()}/cypress/integration/foo3/bar/baz/foo4.ts`)
     })
+
+    // https://github.com/cypress-io/cypress/issues/28509
+    it('correctly escapes parentheses in filename', function () {
+      const options = this.setup('--spec', 'cypress/integration/foo/bar/test().ts')
+
+      expect(options.spec[0]).to.eq(`${getCwd()}/cypress/integration/foo/bar/test\\(\\).ts`)
+    })
   })
 
   context('--tag', () => {