diff --git a/index/spec_index_test.go b/index/spec_index_test.go
index e2c0de3..9c022d3 100644
--- a/index/spec_index_test.go
+++ b/index/spec_index_test.go
@@ -216,6 +216,7 @@ func TestSpecIndex_DigitalOcean_FullCheckoutLocalResolve(t *testing.T) {
 
 	// create a new config that allows local and remote to be mixed up.
 	cf := CreateOpenAPIIndexConfig()
+	cf.ExtractRefsSequentially = true
 	cf.AllowRemoteLookup = true
 	cf.AvoidCircularReferenceCheck = true
 	cf.BasePath = basePath