diff --git a/testing/conntest/src/test/java/com/evolveum/midpoint/testing/conntest/ad/AdTestMixin.java b/testing/conntest/src/test/java/com/evolveum/midpoint/testing/conntest/ad/AdTestMixin.java
index cda56d91940..514bf27c05c 100644
--- a/testing/conntest/src/test/java/com/evolveum/midpoint/testing/conntest/ad/AdTestMixin.java
+++ b/testing/conntest/src/test/java/com/evolveum/midpoint/testing/conntest/ad/AdTestMixin.java
@@ -28,6 +28,9 @@
 import com.evolveum.midpoint.util.exception.SchemaException;
 import com.evolveum.midpoint.xml.ns._public.common.common_3.ResourceType;
 
+/**
+ * Mixin providing common methods/utilities for Active Directory (AD) related tests.
+ */
 public interface AdTestMixin extends MidpointTestMixin {
 
     String ATTRIBUTE_OBJECT_GUID_NAME = "objectGUID";