---
sourceDocument: Yokohama Build or modify applications
sourceDocumentLink: https://www.servicenow.com/docs/r/yokohama/application-development

 Release :

    - yokohama

ft:locale :

    - en-US

ft:publication_title :

    - Yokohama Build or modify applications

ft:clusterId :

    - cadev

bundleId :

    - cadev

workflow :

    - Development, Data, and Analytics


---

# Reusable tests

# Reusable tests {#ariaid-title1}

* Release version: Yokohama
* 
* Updated January 30, 2025
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Leverage reusable tests to simplify test maintenance and streamline the management of large tests and test suites. Reusable tests reduce redundancy, ensuring consistent and reliable test execution across your system.  
Note:  
A reusable test can be invoked only from another test (a regular test or a reusable test). The reusable test can't be added to test suites individually.  
Use the following related lists to pass variables from one test to another. Select New to create either the reusable input or output.

* Reusable Input Variables: Contains the reusable input variables that are passed in from the parent test. The variable is passed from the test calling the current reusable test.
* Reusable Output Variables: Contains the reusable output variables that are passed in from the child test. The variable is intended to be passed back up to the parent test calling the current reusable test.
{#atf-reuse-tests__ul_djh_d2t_ddc}

Note:  
The reusable input and output variables that you create for the test are shown under the Reusable Input Variables and Reusable Output Variables related lists. The input variables are passed in from the parent test that is calling the current reusable test and is used by the reusable test. The output variables are passed back to the parent test and are used only by its test steps.

Use the Reusable Test test step category to access the created reusable test records. See [Reusable Tests category](https://www.servicenow.com/docs/9PyisBe6SIgXFmTwq2iklA "Create reusable test components that can be incorporated into various other tests (regular or reusable test), minimizing redundant test code and enhancing test maintainability.") for more information.
* **[Create a reusable test](https://www.servicenow.com/docs/pKqPfxLf7mkZjJEoYaM9qg)**   
  Create a reusable test to avoid redundancy, ensuring better test maintenance and reliable test execution across the instance.
* **[Invoke a reusable test](https://www.servicenow.com/docs/9YoDnyVXC56XXsWs6QkDKg)**   
  Implement the following steps to invoke a reusable test in a test (regular or reusable test) or a test in a test suite.

**Related concepts**   

* [Mutually exclusive tests](https://www.servicenow.com/docs/884Ig1mX7NPTg4D5eiCQEQ "Prevent conflicting tests from running in parallel by marking them as mutually exclusive. For example, when the system identifies tests that modify the same record, the system makes these tests mutually exclusive. You can also manually mark tests as mutually exclusive.")
* [Quick start tests](https://www.servicenow.com/docs/UKuAIwH~uhuhX9Sj9JIxeA "Copy and customize quick start tests provided by the ServiceNow AI Platform to validate that your instance works after you make any configuration changes. For example, if you apply an upgrade or develop an application.")
* [Parallel testing](https://www.servicenow.com/docs/JvU396s4c7LtkgdozBTekQ "Reduce test design time by running multiple tests and test suites in parallel. Design tests to run in parallel by avoiding resource conflicts and data dependencies.")
* [Performance profiling](https://www.servicenow.com/docs/CcCHmpsHxWYcdRp3smV~0A#atf-perf-prof "Performance profiling allows you to do performance testing on your instances.")