---
sourceDocument: Australia Build or modify applications
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/pt-BR/application-development

 Release :

    - australia

ft:locale :

    - pt-BR

ft:publication_title :

    - Australia Build or modify applications

ft:clusterId :

    - cadev

bundleId :

    - cadev

workflow :

    - Development, Data, and Analytics


---

# Mutually exclusive tests

# Mutually exclusive tests {#ariaid-title1}

* Versão de lançamento: Australia
* 
* Atualizado 12 de mar. de 2026
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 min. de leitura

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.

The system marks tests as mutually exclusive when there is a potential resource conflict. When the system can't detect resource conflicts automatically, you can create your own mutual exclusion rules that can prevent conflicting
tests from running in parallel. For example, if a test changes a sys_properties record, the record shows up under Records Modified of that test. If the validation path of another test depends on the same
sys_properties record without any change, that test fails. This can occur if the previous test runs at the same
time.

You can view mutually exclusive tests on the Mutually Exclusive Tests related list in the test form. This related list shows all tests that don't run in parallel with the current test and the reason. The same test might appear more
than once in the list if there are multiple reasons.

## Mutually exclusive tests reasons {#mutual-exclusion-rule__section_sr2_4ts_thb}

Tests are marked mutually exclusive for the following reasons.

* Two or more tests modify the same record.
* A test that runs in parallel with itself.
* You can create your own mutual exclusion rules when the system can't detect resource conflicts automatically.
{#mutual-exclusion-rule__ul_lxy_dwg_phb}

## Mark tests as mutually exclusive {#mutual-exclusion-rule__section_egk_ztm_thb}

You can mark tests as mutually exclusive using any of the following methods.

Mutually Exclusive Tests tab
:   Select a test from the Tests list and navigate to Mutually Exclusive TestsAdd Mutual Exclusion to make the selected test mutually exclusive with another test.

Tests list
:   Select one or more tests from the Tests list and choose Add mutually exclusive test from the Action on selected rows context menu. Enter one test in the Add mutually exclusive test dialog box to
    make the selected tests mutually exclusive with the current test.

Parallel Test Runs tab
:   When two or more tests run in parallel, navigate to Test ResultsParallel Test Runs. Select one or more tests and choose Add mutually exclusive test from the Action on selected rows context menu to mark the selected tests as mutually exclusive.  
    Nota:  
    The Parallel Test Runs tab is visible only if the test runs in parallel with one or more tests.
**Conceitos relacionados**   

* [Reusable tests](https://servicenow-prod.fluidtopics.net/l2F8WnAmCXvxTaa7JG3Z9Q "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.")
* [Quick start tests](https://servicenow-prod.fluidtopics.net/GkQ6locmEFTg07jV61_0Gg "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://servicenow-prod.fluidtopics.net/8G~pxCIx_w4frw091mNx1Q "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://servicenow-prod.fluidtopics.net/a3GGmpiiAGL0amYkDMweMw#atf-perf-prof "Performance profiling allows you to do performance testing on your instances.")  
**Tarefas relacionadas**   

* [Accelerate ATF tests failure resolution](https://servicenow-prod.fluidtopics.net/pQTF_LtxkOq~IHprj6OSCg "Resolve ATF test failures faster using the actionable support provided by the new ATF failure insights feature. You can achieve it by accessing the Find changes since last successful run related link.")