diff --git a/hdkeychain/go.sum b/hdkeychain/go.sum
index fb2083ca73..5e59b71cc5 100644
--- a/hdkeychain/go.sum
+++ b/hdkeychain/go.sum
@@ -17,7 +17,6 @@ github.com/decred/dcrd/dcrec v1.0.0 h1:W+z6Es+Rai3MXYVoPAxYr5U1DGis0Co33scJ6uH2J
 github.com/decred/dcrd/dcrec v1.0.0/go.mod h1:HIaqbEJQ+PDzQcORxnqen5/V1FR3B4VpIfmePklt8Q8=
 github.com/decred/dcrd/dcrec/edwards/v2 v2.0.1 h1:V6eqU1crZzuoFT4KG2LhaU5xDSdkHuvLQsj25wd7Wb4=
 github.com/decred/dcrd/dcrec/edwards/v2 v2.0.1/go.mod h1:d0H8xGMWbiIQP7gN3v2rByWUcuZPm9YsgmnfoxgbINc=
-github.com/decred/dcrd/dcrutil/v4 v4.0.0-20210129181600-6ae0142d3b28/go.mod h1:xe59jKcMx5G/dbRmsZ8+FzY+WQDE/7YBP3k3uzJTtmI=
 github.com/decred/dcrd/wire v1.4.0 h1:KmSo6eTQIvhXS0fLBQ/l7hG7QLcSJQKSwSyzSqJYDk0=
 github.com/decred/dcrd/wire v1.4.0/go.mod h1:WxC/0K+cCAnBh+SKsRjIX9YPgvrjhmE+6pZlel1G7Ro=
 github.com/decred/slog v1.1.0/go.mod h1:kVXlGnt6DHy2fV5OjSeuvCJ0OmlmTF6LFpEPMu/fOY0=
diff --git a/txscript/go.mod b/txscript/go.mod
index f06c04789b..a5dbf0ad61 100644
--- a/txscript/go.mod
+++ b/txscript/go.mod
@@ -12,12 +12,8 @@ require (
 	github.com/decred/dcrd/dcrec v1.0.0
 	github.com/decred/dcrd/dcrec/edwards/v2 v2.0.1
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.0-20210127014238-b33b46cf1a24
-	github.com/decred/dcrd/dcrutil/v4 v4.0.0-20210129181600-6ae0142d3b28
 	github.com/decred/dcrd/wire v1.4.0
 	github.com/decred/slog v1.1.0
 )
 
-replace (
-	github.com/decred/dcrd/dcrec/secp256k1/v4 => ../dcrec/secp256k1
-	github.com/decred/dcrd/dcrutil/v4 => ../dcrutil
-)
+replace github.com/decred/dcrd/dcrec/secp256k1/v4 => ../dcrec/secp256k1
diff --git a/txscript/reference_test.go b/txscript/reference_test.go
index f29eef351f..3d2a238834 100644
--- a/txscript/reference_test.go
+++ b/txscript/reference_test.go
@@ -18,7 +18,6 @@ import (
 	"testing"
 
 	"github.com/decred/dcrd/chaincfg/chainhash"
-	"github.com/decred/dcrd/dcrutil/v4"
 	"github.com/decred/dcrd/wire"
 )
 
@@ -559,10 +558,9 @@ testloop:
 			continue
 		}
 
-		tx, err := dcrutil.NewTxFromBytes(serializedTx)
-		if err != nil {
-			t.Errorf("bad test (arg 2 not msgtx %v) %d: %v", err,
-				i, test)
+		var tx wire.MsgTx
+		if err := tx.Deserialize(bytes.NewReader(serializedTx)); err != nil {
+			t.Errorf("bad test (arg 2 not msgtx %v) %d: %v", err, i, test)
 			continue
 		}
 
@@ -632,8 +630,8 @@ testloop:
 			prevOuts[*wire.NewOutPoint(prevhash, idx, wire.TxTreeRegular)] = script
 		}
 
-		for k, txin := range tx.MsgTx().TxIn {
-			pkScript, ok := prevOuts[txin.PreviousOutPoint]
+		for k, txIn := range tx.TxIn {
+			pkScript, ok := prevOuts[txIn.PreviousOutPoint]
 			if !ok {
 				t.Errorf("bad test (missing %dth input) %d:%v",
 					k, i, test)
@@ -642,8 +640,7 @@ testloop:
 			// These are meant to fail, so as soon as the first
 			// input fails the transaction has failed. (some of the
 			// test txns have good inputs, too..
-			vm, err := NewEngine(pkScript, tx.MsgTx(), k, flags, 0,
-				nil)
+			vm, err := NewEngine(pkScript, &tx, k, flags, 0, nil)
 			if err != nil {
 				continue testloop
 			}
@@ -701,10 +698,9 @@ testloop:
 			continue
 		}
 
-		tx, err := dcrutil.NewTxFromBytes(serializedTx)
-		if err != nil {
-			t.Errorf("bad test (arg 2 not msgtx %v) %d: %v", err,
-				i, test)
+		var tx wire.MsgTx
+		if err := tx.Deserialize(bytes.NewReader(serializedTx)); err != nil {
+			t.Errorf("bad test (arg 2 not msgtx %v) %d: %v", err, i, test)
 			continue
 		}
 
@@ -774,15 +770,14 @@ testloop:
 			prevOuts[*wire.NewOutPoint(prevhash, idx, wire.TxTreeRegular)] = script
 		}
 
-		for k, txin := range tx.MsgTx().TxIn {
-			pkScript, ok := prevOuts[txin.PreviousOutPoint]
+		for k, txIn := range tx.TxIn {
+			pkScript, ok := prevOuts[txIn.PreviousOutPoint]
 			if !ok {
 				t.Errorf("bad test (missing %dth input) %d:%v",
 					k, i, test)
 				continue testloop
 			}
-			vm, err := NewEngine(pkScript, tx.MsgTx(), k, flags, 0,
-				nil)
+			vm, err := NewEngine(pkScript, &tx, k, flags, 0, nil)
 			if err != nil {
 				t.Errorf("test (%d:%v:%d) failed to create "+
 					"script: %v", i, test, k, err)