diff --git a/tests/Unit/Module/Exception/ModuleActivationBlockedExceptionTest.php b/tests/Unit/Module/Exception/ModuleActivationBlockedExceptionTest.php
new file mode 100644
index 0000000..2275215
--- /dev/null
+++ b/tests/Unit/Module/Exception/ModuleActivationBlockedExceptionTest.php
@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * Copyright © OXID eSales AG. All rights reserved.
+ * See LICENSE file for license details.
+ */
+
+declare(strict_types=1);
+
+namespace OxidEsales\GraphQL\ConfigurationAccess\Tests\Unit\Module\Exception;
+
+use OxidEsales\GraphQL\ConfigurationAccess\Module\Exception\ModuleActivationBlockedException;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \OxidEsales\GraphQL\ConfigurationAccess\Module\Exception\ModuleActivationBlockedException
+ */
+final class ModuleActivationBlockedExceptionTest extends TestCase
+{
+    public function testException(): void
+    {
+        $moduleId = uniqid();
+        $exception = new ModuleActivationBlockedException($moduleId);
+
+        $this->assertInstanceOf(ModuleActivationBlockedException::class, $exception);
+        $this->assertSame(
+            sprintf('Module "%s" is in the blocklist and cannot be activated.', $moduleId),
+            $exception->getMessage()
+        );
+    }
+}