diff --git a/gcs/builder/builder_test.go b/gcs/builder/builder_test.go
index 5cfd17e..35c826e 100644
--- a/gcs/builder/builder_test.go
+++ b/gcs/builder/builder_test.go
@@ -51,12 +51,12 @@ var (
 	testAddr = "3Nxwenay9Z8Lc9JBiywExpnEFiLp6Afp8v"
 
 	witness = [][]byte{
-		[]byte{0x4c, 0xb1, 0xab, 0x12, 0x57, 0x62, 0x1e, 0x41,
+		{0x4c, 0xb1, 0xab, 0x12, 0x57, 0x62, 0x1e, 0x41,
 			0x3b, 0x8b, 0x0e, 0x26, 0x64, 0x8d, 0x4a, 0x15,
 			0x3b, 0x8b, 0x0e, 0x26, 0x64, 0x8d, 0x4a, 0x15,
 			0x3b, 0x8b, 0x0e, 0x26, 0x64, 0x8d, 0x4a, 0x15},
 
-		[]byte{0xdd, 0xa3, 0x5a, 0x14, 0x88, 0xfb, 0x97, 0xb6,
+		{0xdd, 0xa3, 0x5a, 0x14, 0x88, 0xfb, 0x97, 0xb6,
 			0xeb, 0x3f, 0xe6, 0xe9, 0xef, 0x2a, 0x25, 0x81,
 			0x4e, 0x39, 0x6f, 0xb5, 0xdc, 0x29, 0x5f, 0xe9,
 			0x94, 0xb9, 0x67, 0x89, 0xb2, 0x1a, 0x03, 0x98,