diff --git a/btcec/btcec_test.go b/btcec/btcec_test.go
index 946d1f116..c96bfb22f 100644
--- a/btcec/btcec_test.go
+++ b/btcec/btcec_test.go
@@ -560,7 +560,7 @@ func TestBaseMultVerify(t *testing.T) {
 			data := make([]byte, bytes)
 			_, err := rand.Read(data)
 			if err != nil {
-				t.Errorf("failed to read random data for %s", i)
+				t.Errorf("failed to read random data for %d", i)
 				continue
 			}
 			x, y := s256.ScalarBaseMult(data)
diff --git a/goclean.sh b/goclean.sh
index f16246006..642689681 100755
--- a/goclean.sh
+++ b/goclean.sh
@@ -12,7 +12,7 @@ set -e
 # Automatic checks
 test -z $(gofmt -l -w . | tee /dev/stderr)
 test -z $(goimports -l -w . | tee /dev/stderr)
-test -z $(golint ./... | grep -v "ALL_CAPS" | grep -v "OP_" | tee /dev/stderr)
+test -z $(golint ./... | grep -v "ALL_CAPS" | grep -v "OP_" | grep -v "NewFieldVal" | tee /dev/stderr)
 go tool vet -structtags=false .
 env GORACE="halt_on_error=1" go test -v -race ./...