diff --git a/tests/php-unit-tests/unitary-tests/setup/iTopExtensionTest.php b/tests/php-unit-tests/unitary-tests/setup/iTopExtensionTest.php
new file mode 100644
index 000000000..f78db9978
--- /dev/null
+++ b/tests/php-unit-tests/unitary-tests/setup/iTopExtensionTest.php
@@ -0,0 +1,69 @@
+<?php
+
+use Combodo\iTop\Test\UnitTest\ItopTestCase;
+
+class iTopExtensionTest extends ItopTestCase
+{
+	protected function setUp(): void
+	{
+		parent::setUp();
+		$this->RequireOnceItopFile('/setup/unattended-install/InstallationFileService.php');
+		ModuleDiscovery::ResetCache();
+	}
+
+	public function testCanBeUninstalledDefaultValueIsTrue()
+	{
+		$oExtension = new iTopExtension();
+		$this->assertTrue($oExtension->CanBeUninstalled(), 'An extension should be uninstallable by default.');
+	}
+
+	public function testCanBeUninstalledReturnTrueWhenAllModulesCanBeUninstalled()
+	{
+		$oExtension = new iTopExtension();
+		$oExtension->aModuleInfo['combodo-test-yes1'] = [
+			'uninstallable' => 'yes',
+		];
+		$oExtension->aModuleInfo['combodo-test-yes2'] = [
+			'uninstallable' => 'yes',
+		];
+		$this->assertTrue($oExtension->CanBeUninstalled(), 'An extension should be considered uninstallable if all of its modules are uninstallable.');
+	}
+
+	public function testCanBeUninstalledReturnFalseWhenAtLeastOneModuleCannotBeUninstalled()
+	{
+		$oExtension = new iTopExtension();
+		$oExtension->aModuleInfo['combodo-test-yes'] = [
+			'uninstallable' => 'yes',
+		];
+		$oExtension->aModuleInfo['combodo-test-no'] = [
+			'uninstallable' => 'no',
+		];
+		$this->assertFalse($oExtension->CanBeUninstalled(), 'An extension should be considered non-uninstallable if at least one of its modules is not uninstallable.');
+	}
+
+	public function testCanBeUninstalledAnyValueDifferentThanYesIsConsideredFalse()
+	{
+		$oExtension = new iTopExtension();
+		$oExtension->aModuleInfo['combodo-test-maybe'] = [
+			'uninstallable' => 'maybe',
+		];
+		$this->assertFalse($oExtension->CanBeUninstalled(), 'Any value in the uninstallable flag different than yes should be considered false.');
+	}
+
+	public function testCanBeUninstalledExtensionValueOverwriteModulesValue()
+	{
+		$oExtension = new iTopExtension();
+		$oExtension->bCanBeUninstalled = true;
+		$oExtension->aModuleInfo['combodo-test-no'] = [
+			'uninstallable' => 'no',
+		];
+		$this->assertTrue($oExtension->CanBeUninstalled(), 'The uninstallable flag provided in the extension should prevail over those defined in the modules.');
+
+		$oExtension = new iTopExtension();
+		$oExtension->bCanBeUninstalled = false;
+		$oExtension->aModuleInfo['combodo-test-yes'] = [
+			'uninstallable' => 'yes',
+		];
+		$this->assertFalse($oExtension->CanBeUninstalled(), 'The uninstallable flag provided in the extension should prevail over those defined in the modules.');
+	}
+}