diff --git a/datamodel/low/base/discriminator_test.go b/datamodel/low/base/discriminator_test.go
index f6c145c0..22fea0f0 100644
--- a/datamodel/low/base/discriminator_test.go
+++ b/datamodel/low/base/discriminator_test.go
@@ -48,4 +48,7 @@ propertyName: freshCakes`
 	_ = low.BuildModel(rNode.Content[0], &rDoc)
 
 	assert.Equal(t, lDoc.Hash(), rDoc.Hash())
+	assert.NotNil(t, lDoc.GetRootNode())
+	assert.NotNil(t, lDoc.GetKeyNode())
+
 }