diff --git a/beacon-chain/core/helpers/BUILD.bazel b/beacon-chain/core/helpers/BUILD.bazel
index 9fbf288c8..175911813 100644
--- a/beacon-chain/core/helpers/BUILD.bazel
+++ b/beacon-chain/core/helpers/BUILD.bazel
@@ -67,6 +67,7 @@ go_test(
     shard_count = 2,
     deps = [
         "//beacon-chain/cache:go_default_library",
+        "//beacon-chain/state/interface:go_default_library",
         "//beacon-chain/state/stateV0:go_default_library",
         "//proto/beacon/p2p/v1:go_default_library",
         "//shared/bls:go_default_library",
diff --git a/beacon-chain/core/helpers/signing_root_test.go b/beacon-chain/core/helpers/signing_root_test.go
index 8131037a5..8f7c223ea 100644
--- a/beacon-chain/core/helpers/signing_root_test.go
+++ b/beacon-chain/core/helpers/signing_root_test.go
@@ -5,21 +5,25 @@ import (
 	"testing"
 
 	fuzz "github.com/google/gofuzz"
+	eth "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
 	"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
+	iface "github.com/prysmaticlabs/prysm/beacon-chain/state/interface"
 	ethereum_beacon_p2p_v1 "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
+	"github.com/prysmaticlabs/prysm/shared/bls"
 	"github.com/prysmaticlabs/prysm/shared/bytesutil"
+	"github.com/prysmaticlabs/prysm/shared/params"
 	"github.com/prysmaticlabs/prysm/shared/testutil"
 	"github.com/prysmaticlabs/prysm/shared/testutil/assert"
 	"github.com/prysmaticlabs/prysm/shared/testutil/require"
 )
 
-func TestSigningRoot_ComputeOK(t *testing.T) {
+func TestSigningRoot_ComputeSigningRoot(t *testing.T) {
 	emptyBlock := testutil.NewBeaconBlock()
 	_, err := helpers.ComputeSigningRoot(emptyBlock, bytesutil.PadTo([]byte{'T', 'E', 'S', 'T'}, 32))
 	assert.NoError(t, err, "Could not compute signing root of block")
 }
 
-func TestComputeDomain_OK(t *testing.T) {
+func TestSigningRoot_ComputeDomain(t *testing.T) {
 	tests := []struct {
 		epoch      uint64
 		domainType [4]byte
@@ -40,7 +44,53 @@ func TestComputeDomain_OK(t *testing.T) {
 	}
 }
 
-func TestComputeForkDigest_OK(t *testing.T) {
+func TestSigningRoot_ComputeDomainAndSign(t *testing.T) {
+	tests := []struct {
+		name       string
+		genState   func(t *testing.T) (iface.BeaconState, []bls.SecretKey)
+		genBlock   func(t *testing.T, st iface.BeaconState, keys []bls.SecretKey) *eth.SignedBeaconBlock
+		domainType [4]byte
+		want       []byte
+	}{
+		{
+			name: "block proposer",
+			genState: func(t *testing.T) (iface.BeaconState, []bls.SecretKey) {
+				beaconState, privKeys := testutil.DeterministicGenesisState(t, 100)
+				require.NoError(t, beaconState.SetSlot(beaconState.Slot()+1))
+				return beaconState, privKeys
+			},
+			genBlock: func(t *testing.T, st iface.BeaconState, keys []bls.SecretKey) *eth.SignedBeaconBlock {
+				block, err := testutil.GenerateFullBlock(st, keys, nil, 1)
+				require.NoError(t, err)
+				return block
+			},
+			domainType: params.BeaconConfig().DomainBeaconProposer,
+			want: []byte{
+				0xad, 0xd8, 0xf0, 0xd1, 0xae, 0x82, 0xaa, 0x3, 0x9a, 0xcd, 0x8e, 0xb7, 0x84, 0x14, 0x1c, 0x21, 0x81,
+				0xbc, 0x1b, 0x2, 0xb5, 0x6d, 0x4c, 0x76, 0x36, 0x5f, 0xba, 0x6e, 0x33, 0x9e, 0xda, 0xe, 0x36, 0xe1,
+				0xf, 0x30, 0xae, 0x6, 0x44, 0xd4, 0x38, 0x21, 0xf0, 0x45, 0xc2, 0x54, 0x68, 0x2f, 0x12, 0xcc, 0x27,
+				0x45, 0x72, 0x5, 0xaf, 0xb4, 0x85, 0x60, 0xdb, 0x7a, 0x1f, 0xe7, 0xa8, 0x62, 0xf5, 0x71, 0xac, 0x88,
+				0x8c, 0xd3, 0xba, 0x4d, 0xa3, 0x3d, 0x3b, 0x87, 0x9b, 0x23, 0xae, 0xe4, 0x46, 0xc6, 0x36, 0xca, 0xa5,
+				0xa1, 0x2d, 0x9e, 0x7, 0xc1, 0x40, 0xed, 0x99, 0xfd, 0xae, 0xce,
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			beaconState, privKeys := tt.genState(t)
+			idx, err := helpers.BeaconProposerIndex(beaconState)
+			require.NoError(t, err)
+			block := tt.genBlock(t, beaconState, privKeys)
+			got, err := helpers.ComputeDomainAndSign(
+				beaconState, helpers.CurrentEpoch(beaconState), block, tt.domainType, privKeys[idx])
+			require.NoError(t, err)
+			require.DeepEqual(t, tt.want, got, "Incorrect signature")
+		})
+	}
+}
+
+func TestSigningRoot_ComputeForkDigest(t *testing.T) {
 	tests := []struct {
 		version []byte
 		root    [32]byte