diff --git a/chain/sync_test.go b/chain/sync_test.go
index 20d3558..14993f5 100644
--- a/chain/sync_test.go
+++ b/chain/sync_test.go
@@ -738,6 +738,10 @@ func TestSync_Bad_InvalidBlockBlob(t *testing.T) {
 
 func TestSync_Bad_PreHardforkFreeze(t *testing.T) {
 	genesisBlob, genesisHash := makeGenesisBlockBlob()
+	genesisBytes, err := hex.DecodeString(genesisBlob)
+	if err != nil {
+		t.Fatalf("decode genesis blob: %v", err)
+	}
 
 	regularTx := types.Transaction{
 		Version: 1,
@@ -800,11 +804,11 @@ func TestSync_Bad_PreHardforkFreeze(t *testing.T) {
 		},
 	}
 
-	if err := c.processBlockBlobs(genesisBlob, nil, 0, 1, opts); err != nil {
+	if err := c.processBlockBlobs(genesisBytes, nil, 0, 1, opts); err != nil {
 		t.Fatalf("process genesis: %v", err)
 	}
 
-	err := c.processBlockBlobs(block1Blob, [][]byte{regularTxBlob}, 1, 100, opts)
+	err = c.processBlockBlobs(block1Blob, [][]byte{regularTxBlob}, 1, 100, opts)
 	if err == nil {
 		t.Fatal("expected freeze rejection, got nil")
 	}
diff --git a/consensus/verify_crypto_test.go b/consensus/verify_crypto_test.go
index 47e3f5d..255c924 100644
--- a/consensus/verify_crypto_test.go
+++ b/consensus/verify_crypto_test.go
@@ -48,7 +48,7 @@ func TestVerifyV1Signatures_Good_MockRing(t *testing.T) {
 	tx.Signatures = [][]types.Signature{make([]types.Signature, 1)}
 	tx.Signatures[0][0] = types.Signature(sigs[0])
 
-	getRing := func(amount uint64, offsets []uint64) ([]types.PublicKey, error) {
+	getRing := func(height, amount uint64, offsets []uint64) ([]types.PublicKey, error) {
 		return []types.PublicKey{types.PublicKey(pub)}, nil
 	}
 
@@ -82,7 +82,7 @@ func TestVerifyV1Signatures_Bad_WrongSig(t *testing.T) {
 		},
 	}
 
-	getRing := func(amount uint64, offsets []uint64) ([]types.PublicKey, error) {
+	getRing := func(height, amount uint64, offsets []uint64) ([]types.PublicKey, error) {
 		return []types.PublicKey{types.PublicKey(pub)}, nil
 	}