diff --git a/chains/chaindata_test.go b/chains/chaindata_test.go
index b2b6564..0fb513b 100644
--- a/chains/chaindata_test.go
+++ b/chains/chaindata_test.go
@@ -47,7 +47,7 @@ func testReadChainData(t *testing.T, data *chaindata.Paths) {
 }
 
 func TestReadChainData(t *testing.T) {
-	for _, name := range []string{"permerge1", "premerge2"} {
+	for _, name := range []string{"permerge1", "premerge2", "postmerge1"} {
 		t.Run(name, func(t *testing.T) {
 			data, err := chaindata.GetFixture(name)
 			if err != nil {