diff --git a/testdata/dot-ref/class-eg.dot b/testdata/dot-ref/class-eg.dot
index 2bb3dfe..352349e 100644
--- a/testdata/dot-ref/class-eg.dot
+++ b/testdata/dot-ref/class-eg.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;
// Person
- c42 [label=<>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+ c42 [label=<>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
// Employee
- c43 [label=<>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+ c43 [label=<>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
// Client
- c44 [label=<>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+ c44 [label=<>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
//Employee extends Person
c42:p -> c43:p [dir=back,arrowtail=empty];
//Client extends Person