diff --git a/testutil/validatormock/propose.go b/testutil/validatormock/propose.go
index 788c5c429..299f4282d 100644
--- a/testutil/validatormock/propose.go
+++ b/testutil/validatormock/propose.go
@@ -128,6 +128,7 @@ func ProposeBlock(ctx context.Context, eth2Cl eth2wrap.Client, signFunc SignFunc
 
 	signedBlock := new(eth2api.VersionedSignedProposal)
 	signedBlock.Version = block.Version
+	signedBlock.Blinded = block.Blinded
 
 	if block.Blinded {
 		switch block.Version {