From a23b1a3624c0b114fd832abd2757921cf4542c7f Mon Sep 17 00:00:00 2001
From: Saqib Ansari <nextchamp.saqib@gmail.com>
Date: Thu, 19 Mar 2026 14:03:27 +0530
Subject: [PATCH] fix: disable cloud parallelization

---
 .github/workflows/_base-ui-tests.yml | 4 ++--
 cypress.config.js                    | 6 +++++-
 frappe/commands/testing.py           | 7 +++++--
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/_base-ui-tests.yml b/.github/workflows/_base-ui-tests.yml
index 82d35320e4..5d7b44e369 100644
--- a/.github/workflows/_base-ui-tests.yml
+++ b/.github/workflows/_base-ui-tests.yml
@@ -110,9 +110,9 @@ jobs:
             run-ui-tests ${{ github.event.repository.name }} \
               --with-coverage \
               --headless \
-              --parallel \
               --browser ${{ env.BROWSER_PATH }} \
-              --ci-build-id $GITHUB_RUN_ID-$GITHUB_RUN_ATTEMPT
+              --ci-build-id $GITHUB_RUN_ID-$GITHUB_RUN_ATTEMPT \
+              --group ui-shard-${{ matrix.index }}
         env:
           CYPRESS_RECORD_KEY: 4a48f41c-11b3-425b-aa88-c58048fa69eb
           SPLIT: ${{ inputs.parallel-runs }}
diff --git a/cypress.config.js b/cypress.config.js
index 0267ee62db..d8c24119f7 100644
--- a/cypress.config.js
+++ b/cypress.config.js
@@ -21,9 +21,13 @@ module.exports = defineConfig({
 		// We've imported your old cypress plugins here.
 		// You may want to clean this up later by importing these.
 		setupNodeEvents(on, config) {
+			// Splitting tests only works when Cypress Cloud is not orchestrating parallel runs.
+			if (process.env.CYPRESS_CLOUD_PARALLEL !== "1") {
+				cypressSplit(on, config);
+			}
+
 			// Delete videos for specs without failing or retried tests
 			// https://docs.cypress.io/guides/guides/screenshots-and-videos#Delete-videos-for-specs-without-failing-or-retried-tests
-			cypressSplit(on, config);
 			on("after:spec", (spec, results) => {
 				if (results && results.video) {
 					const failures = results.tests.some((test) =>
diff --git a/frappe/commands/testing.py b/frappe/commands/testing.py
index 0cf53d1111..78468b0fd3 100644
--- a/frappe/commands/testing.py
+++ b/frappe/commands/testing.py
@@ -447,7 +447,7 @@ def run_ui_tests(
 	context: CliCtxObj,
 	app,
 	headless=False,
-	parallel=True,
+	parallel=False,
 	with_coverage=False,
 	browser="chrome",
 	ci_build_id=None,
@@ -519,7 +519,10 @@ def run_ui_tests(
 	run_or_open = f"run --browser {browser}" if headless else "open"
 	if headless and spec:
 		run_or_open += f" --spec {spec}"
-	formatted_command = f"{site_env} {password_env} {coverage_env} {cypress_path} {run_or_open}"
+	parallel_env = "CYPRESS_CLOUD_PARALLEL=1" if parallel else "CYPRESS_CLOUD_PARALLEL=0"
+	formatted_command = (
+		f"{site_env} {password_env} {coverage_env} {parallel_env} {cypress_path} {run_or_open}"
+	)
 
 	if os.environ.get("CYPRESS_RECORD_KEY"):
 		formatted_command += " --record"