diff --git a/src/pages/docs/administration/upgrading/guide/creating-test-instance.mdx b/src/pages/docs/administration/upgrading/guide/creating-test-instance.mdx
index ec7879cec8..9b01a4fe3a 100644
--- a/src/pages/docs/administration/upgrading/guide/creating-test-instance.mdx
+++ b/src/pages/docs/administration/upgrading/guide/creating-test-instance.mdx
@@ -1,11 +1,12 @@
 ---
 layout: src/layouts/Default.astro
 pubDate: 2023-01-01
-modDate: 2023-01-01
+modDate: 2023-10-02
 title: Creating a test instance
 description: A guide on how to create a test instance with Octopus Deploy
 navOrder: 8
 ---
+import UpgradeFindAndBackupMasterKey from 'src/shared-content/upgrade/upgrade-find-and-backup-master-key.md';
 import UpgradeOctopusBackupDatabase from 'src/shared-content/upgrade/upgrade-octopus-backup-database.include.md';
 import UpgradeTestingUpgradedInstance from 'src/shared-content/upgrade/upgrade-testing-upgraded-instance.include.md';
 import UpgradeRestoreBackup from 'src/shared-content/upgrade/upgrade-restore-backup.include.md';
@@ -71,6 +72,7 @@ Configuring a clone typically takes much more time and compute resources.  There
 
 Creating a clone of an existing instance involves:
 
+1. Finding and backing up your Master Key.
 1. Enabling maintenance mode on the main instance.
 1. Backing up the database of the main instance.
 1. Disabling maintenance mode on the main instance.
@@ -83,6 +85,8 @@ Creating a clone of an existing instance involves:
 1. Upgrade the test instance to the latest version of Octopus Deploy.
 1. Test and verify the test instance.
 
+<UpgradeFindAndBackupMasterKey />
+
 <UpgradeOctopusBackupDatabase />
 
 <UpgradeRestoreBackup />
diff --git a/src/shared-content/upgrade/upgrade-find-and-backup-master-key.md b/src/shared-content/upgrade/upgrade-find-and-backup-master-key.md
new file mode 100644
index 0000000000..b1c6892de2
--- /dev/null
+++ b/src/shared-content/upgrade/upgrade-find-and-backup-master-key.md
@@ -0,0 +1,14 @@
+### Finding and backing up your Master Key
+
+When connecting an existing Octopus database to a "new" Octopus instance, either due to migration or for testing, you will need the Master Key to gain access to the database during the Octopus instance setup process.
+
+To obtain your existing Master Key from your source Octopus instance, you can simply open Octopus Manager then select "View master key" as shown below:
+
+
+:::figure
+![](/docs/upgrade/images/view-master-key.png)
+:::
+
+Alternatively, you may also use the `show-master-key` command via the `Octopus.Server.exe` command-line tool. [You can find more information on this here](https://octopus.com/docs/octopus-rest-api/octopus.server.exe-command-line/show-master-key).
+
+For Octopus Server instances hosted in Linux containers, you may use the `container exec` command [per the instructions here](https://octopus.com/docs/installation/octopus-server-linux-container#upgrading).