diff --git a/e2etests/e2e_test.go b/e2etests/e2e_test.go
index 5a5b7c57d..8150f5171 100644
--- a/e2etests/e2e_test.go
+++ b/e2etests/e2e_test.go
@@ -115,6 +115,7 @@ func serde(t *testing.T, tc testCase, ruler *textmeasure.Ruler) {
 	var newG d2graph.Graph
 	err = d2graph.DeserializeGraph(b, &newG)
 	trequire.Nil(t, err)
+	trequire.Nil(t, g.Compare(&newG))
 }
 
 func run(t *testing.T, tc testCase) {