diff --git a/compiler/testData/builtin-classes.txt b/compiler/testData/builtin-classes.txt
index 0a65eb38e92..fe0faf78f13 100644
--- a/compiler/testData/builtin-classes.txt
+++ b/compiler/testData/builtin-classes.txt
@@ -1465,6 +1465,10 @@ public open class Throwable {
 
 public object Unit {
     /*primary*/ private constructor Unit()
+
+    public class object <class-object-for-Unit> : kotlin.Unit {
+        /*primary*/ private constructor <class-object-for-Unit>()
+    }
 }
 
 public final annotation class data : kotlin.Annotation {