# Step 4: Installing and Testing a Marketplace App

- **URL:** https://marketplace.gohighlevel.com/docs/oauth/TestingApp
- **Summary:** This section explains how to generate a Test Link for a specific app version in the Developer Marketplace and use it to install the app into a specific location/agency account for testing.

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Version: v3

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This section explains how to generate a **Test Link** for a specific app version in the **Developer Marketplace** and use it to **install the app into a specific location/agency account** for testing.

Prerequisites[​](https://marketplace.gohighlevel.com/docs/oauth/TestingApp#prerequisites "Direct link to Prerequisites")

Before you start, make sure you have:

*   Access to the **Sandbox HighLevel account**
*   Access to the **Developer Marketplace Account**

Steps[​](https://marketplace.gohighlevel.com/docs/oauth/TestingApp#steps "Direct link to Steps")

1.  **Log in** to the **Sandbox account** and the **Developer Marketplace Account**.
2.  Go to **My Apps** and click the **app** you want to test.
3.  From the left-hand navigation, click **Manage**.
4.  Click **Versions**.
5.  Find the version you want to test and click the **three dots (⋯)** menu.
6.  Click **Test Link** and provide the **Location ID** of the account where you want to install and test the app.
7.  **Copy** the install link that is generated.
8.  Open a **new browser tab** and paste the install link.
9.  Click the **Install** button you see in the app details section.
10.  Complete the installation and proceed with testing the app.

Output / Expected Result[​](https://marketplace.gohighlevel.com/docs/oauth/TestingApp#output--expected-result "Direct link to Output / Expected Result")

*   The app version is installed into the **Location ID** you provided.
*   You can now proceed with functional testing (OAuth, API calls, webhooks, custom workflow actions & triggers, custom page, etc.).

*   [Prerequisites](https://marketplace.gohighlevel.com/docs/oauth/TestingApp#prerequisites)
    
*   [Steps](https://marketplace.gohighlevel.com/docs/oauth/TestingApp#steps)
    
*   [Output / Expected Result](https://marketplace.gohighlevel.com/docs/oauth/TestingApp#output--expected-result)