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Configuring SauceCTL

The initial installation and setup of saucectl generates a config.yml file based on the framework and region you select during setup. By default, saucectl will look for this file each time you engage the CLI in order to determine where to find your tests and how and where to run them.

The configuration file is flexible enough to allow for any customizations and definitions that are required for any of the supported frameworks. The following sections describe some of the most common configurations. For information about configuring individual framework projects, see:

Setting an Alternative Configuration File#

Run the following command to configure saucectl to use any configuration file you choose:

saucectl run -c ./path/to/{config-file}.yml

If you are using multiple frameworks or need to configure different sets of tests to run separately, it might be useful to have individual configuration files that you can simply direct saucectl to reference as necessary.

YAML Required

While you can use multiple files of different names or locations to specify your configurations, each file must be a *.yml and follow the saucectl syntax. If you are less comfortable with YAML, any of a wide variety of free online YAML/JSON validator tools may be helpful.


You can configure saucectl to run test suites in parallel up to the concurrency specified in the config file.

sauce:  concurrency: 10

If needed, you can also override the file setting at runtime by specifying a concurrency value as an inline parameter of the saucectl run command:

saucectl run --ccy 10

A setting of 10 runs up to 10 test suites at the same time. If the test has more suites than that, excess suites are queued and run in order as currently running suites complete and new slots are available.

When running on Sauce Cloud, the maximum concurrency that you can use is defined by your account settings.

Sauce Connect#

Sauce Control supports using Sauce Connect to establish a secure connection when running your tests on Sauce Labs. To do so, launch a tunnel; then provide the tunnel identifier your config file:

config.yml tunnel setting
sauce:  tunnel:    id: my_tunnel_id
Choose the Correct Tunnel Identifier

When you launch a tunnel, you can accept the tunnel identifier name that Sauce Labs generates for your account (e.g., {SL-username}_tunnel_id) or specify a name in the launch command:

./sc -u {SL-username} -k {SL-access_key} -i {tunnel_name}

saucectl expects this tunnel_name value in the property of your config file.

Setting up a Proxy#

If you need to go through a proxy server, you can set it through the following variables:

  • HTTP_PROXY: Proxy to use to access HTTP websites
  • HTTPS_PROXY: Proxy to use to access HTTPS websites

At this time, these proxy settings are not supported for Playwright.

Docker Proxy Considerations#

When running in docker-mode, saucectl still must reach the Sauce Labs platform get the latest docker image available or upload the test package to Sauce Cloud, and the docker container needs to access the tested website and Sauce Labs to upload results.

Therefore, you may be required to set the proxy twice, as shown in the following examples:

$> export HTTP_PROXY=$> export HTTPS_PROXY=$> saucectl run -e HTTP_PROXY=${HTTP_PROXY} -e HTTPS_PROXY=${HTTPS_PROXY}

Including Project Descriptors#

The metadata parameter in the configuration file allows you to provide additional information about your project that helps you distinguish it in the various environments in which it is used and reviewed, and also helps you apply filters to easily isolate tests based on metrics that are meaningful to you, as shown in the following example:

sauce:  metadata:    name: Testing Cypress Support    build: RC 10.4.a    tags:      - e2e      - release team      - beta      - featurex

Tailoring Your Test File Bundle#

The saucectl command line bundles your root directory (rootDir parameter of config.yml) and transmits it to the Sauce Labs cloud or your own infrastructure via Docker, then unpacks the bundle and runs the tests. This functionality is partly what allows Sauce Control to operate in a framework-agnostic capacity. However, you can and should manage the inclusion and exclusion of files that get bundled to optimize performance and ensure security.

Excluding Files from the Bundle#

The .sauceignore file allows you to designate certain files to be excluded from bundling.

Add any files that are not direct test dependencies to .sauceignore to reduce the size of your bundle, improve test speed, and protect sensitive information.

Examples of what can be included in .sauceignore:

# .sauceignore
# Ignore node_modulesnode_modules/
# Ignore all log files*.log
# Ignore executables/binaries*.exe*.bin**/*/bin
# Ignore media files*.png*.jpeg*.jpg*.mp4
# Ignore documentation*.rst*.md
# Ignore sensitive datacredentials.yml

Including Node Dependencies#

The default .sauceignore file lists node_modules/ so locally installed node dependencies are excluded from the bundle. If your tests require node dependencies to run, you can either:

Remove "node_modules" from .sauceignore#

Delete or comment out node_modules/ in your .sauceignore file to bundle your node dependencies. For example,

# Do NOT exclude node_modules from bundle# node_modules/

Node dependencies can increase your bundle by potentially hundreds of megabytes, so consider including only the required dependencies rather than the entire node_modules directory. The following sections provide some methods for limiting the scope of dependencies you must include.

Install "devDependencies" Only#

Consider only installing NPM devDependencies if your tests do not require all prod dependencies.

# Only install dev dependenciesnpm install --only=dev
saucectl run
Uninstall Nonessential Dependencies#

If your standard install includes dependencies that aren't needed to run your tests, uninstall them prior to bundling.

# Install node dependenciesnpm ci # or "npm install"
# Remove unneeded dependenciesnpm uninstall appiumnpm uninstall express
saucectl run
Install Essential Dependencies Individually#

If you know that your tests require only specific dependencies, install them individually instead of running npm install or npm ci.

# Install individual dependenciesnpm install cypress-xpathnpm install @cypress/react
saucectl run

Set NPM Packages in config.yml#

You can avoid installing or uninstalling dependencies prior to each bundling operation by defining a default set of NPM packages to install in your sauce configuration file using the npm parameter, as shown in the following example:

npm:  registry:  packages:    lodash: "4.17.20"    "@babel/preset-typescript": "7.12"    "@cypress/react": "^5.0.1"