diff --git a/blockchain/fullblocktests/generate.go b/blockchain/fullblocktests/generate.go
index 242de647..7bd838a5 100644
--- a/blockchain/fullblocktests/generate.go
+++ b/blockchain/fullblocktests/generate.go
@@ -220,20 +220,12 @@ func pushDataScript(items ...[]byte) []byte {
 	return script
 }
 
-// standardCoinbaseScript returns a standard script suitable for use as the
-// signature script of the coinbase transaction of a new block.  In particular,
-// it starts with the block height that is required by version 2 blocks.
-func standardCoinbaseScript(blockHeight int32, extraNonce uint64) ([]byte, error) {
-	return txscript.NewScriptBuilder().AddInt64(int64(blockHeight)).
-		AddInt64(int64(extraNonce)).Script()
-}
-
 // createCoinbaseTx returns a coinbase transaction paying an appropriate
 // subsidy based on the passed block height.  The coinbase signature script
 // conforms to the requirements of version 2 blocks.
 func (g *testGenerator) createCoinbaseTx(blockHeight int32) *wire.MsgTx {
 	extraNonce := uint64(0)
-	coinbaseScript, err := standardCoinbaseScript(blockHeight, extraNonce)
+	coinbaseScript, err := testhelper.StandardCoinbaseScript(blockHeight, extraNonce)
 	if err != nil {
 		panic(err)
 	}
diff --git a/blockchain/internal/testhelper/common.go b/blockchain/internal/testhelper/common.go
index 49f80347..7d16c2f4 100644
--- a/blockchain/internal/testhelper/common.go
+++ b/blockchain/internal/testhelper/common.go
@@ -21,6 +21,14 @@ var (
 	LowFee = btcutil.Amount(1)
 )
 
+// StandardCoinbaseScript returns a standard script suitable for use as the
+// signature script of the coinbase transaction of a new block.  In particular,
+// it starts with the block height that is required by version 2 blocks.
+func StandardCoinbaseScript(blockHeight int32, extraNonce uint64) ([]byte, error) {
+	return txscript.NewScriptBuilder().AddInt64(int64(blockHeight)).
+		AddInt64(int64(extraNonce)).Script()
+}
+
 // OpReturnScript returns a provably-pruneable OP_RETURN script with the
 // provided data.
 func OpReturnScript(data []byte) ([]byte, error) {