diff --git a/testdata/dot-ref/ViewSubclasses.dot b/testdata/dot-ref/ViewSubclasses.dot
index 88db385..c537cb4 100644
--- a/testdata/dot-ref/ViewSubclasses.dot
+++ b/testdata/dot-ref/ViewSubclasses.dot
@@ -7,16 +7,18 @@
 digraph G {
 	edge [fontname="Helvetica",fontsize=10,labelfontname="Helvetica",labelfontsize=10];
 	node [fontname="Helvetica",fontsize=10,shape=plaintext];
+	nodesep=0.25;
+	ranksep=0.5;
 	// gr.spinellis.subclass.classes.SubOneTwo
-	c580 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> SubOneTwo </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	c580 [label=<<table title="gr.spinellis.subclass.classes.SubOneTwo" border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> SubOneTwo </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
 	// gr.spinellis.subclass.classes.SubOneOne
-	c581 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> SubOneOne </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	c581 [label=<<table title="gr.spinellis.subclass.classes.SubOneOne" border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> SubOneOne </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
 	// gr.spinellis.subclass.classes.SubTwo
-	c582 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> SubTwo </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	c582 [label=<<table title="gr.spinellis.subclass.classes.SubTwo" border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> SubTwo </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
 	// gr.spinellis.subclass.classes.SubOne
-	c583 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> SubOne </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	c583 [label=<<table title="gr.spinellis.subclass.classes.SubOne" border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> SubOne </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
 	// gr.spinellis.subclass.classes.Super
-	c584 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p" bgcolor="lemonchiffon"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> Super </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	c584 [label=<<table title="gr.spinellis.subclass.classes.Super" border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p" bgcolor="lemonchiffon"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="center" balign="center"> Super </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
 	//gr.spinellis.subclass.classes.SubOneTwo extends gr.spinellis.subclass.classes.SubOne
 	c583:p -> c580:p [dir=back,arrowtail=empty];
 	//gr.spinellis.subclass.classes.SubOneOne extends gr.spinellis.subclass.classes.SubOne