diff --git a/module/Installer/test/CustomizableAppConfigTest.php b/module/Installer/test/CustomizableAppConfigTest.php
new file mode 100644
index 00000000..c630d719
--- /dev/null
+++ b/module/Installer/test/CustomizableAppConfigTest.php
@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+
+namespace ShlinkioTest\Shlink\Installer;
+
+use PHPUnit\Framework\TestCase;
+use Shlinkio\Shlink\Installer\Config\Plugin\ApplicationConfigCustomizer;
+use Shlinkio\Shlink\Installer\Config\Plugin\LanguageConfigCustomizer;
+use Shlinkio\Shlink\Installer\Model\CustomizableAppConfig;
+
+class CustomizableAppConfigTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function exchangeArrayIgnoresAnyNonProvidedKey()
+    {
+        $config = new CustomizableAppConfig();
+
+        $config->exchangeArray([
+            'app_options' => [
+                'disable_track_param' => null,
+            ],
+            'translator' => [
+                'locale' => 'es',
+            ],
+        ]);
+
+        $this->assertFalse($config->hasDatabase());
+        $this->assertFalse($config->hasUrlShortener());
+        $this->assertTrue($config->hasApp());
+        $this->assertTrue($config->hasLanguage());
+        $this->assertEquals([
+            ApplicationConfigCustomizer::DISABLE_TRACK_PARAM => null,
+        ], $config->getApp());
+        $this->assertEquals([
+            LanguageConfigCustomizer::DEFAULT_LANG => 'es',
+        ], $config->getLanguage());
+    }
+}