diff --git a/testdata/dot-ref/Irp.dot b/testdata/dot-ref/Irp.dot
index 3987c46..e2f4c62 100644
--- a/testdata/dot-ref/Irp.dot
+++ b/testdata/dot-ref/Irp.dot
@@ -7,12 +7,14 @@
 digraph G {
 	edge [fontname="Helvetica",fontsize=10,labelfontname="Helvetica",labelfontsize=10];
 	node [fontname="Helvetica",fontsize=10,shape=plaintext];
+	nodesep=0.25;
+	ranksep=0.5;
 	// Application
-	c0 [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"> Application </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	c0 [label=<<table title="Application" 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"> Application </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
 	// IrpApplication
-	c1 [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"> IrpApplication </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	c1 [label=<<table title="IrpApplication" 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"> IrpApplication </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
 	// Main
-	c2 [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"> Main </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	c2 [label=<<table title="Main" 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"> Main </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
 	//IrpApplication extends Application
 	c0:p -> c1:p [dir=back,arrowtail=empty];
 	// Main DEPEND IrpApplication