diff --git a/internal/testutil/testutil.go b/internal/testutil/testutil.go
index 8f182be..401c9a2 100644
--- a/internal/testutil/testutil.go
+++ b/internal/testutil/testutil.go
@@ -64,7 +64,7 @@ func (sn Snake) Check(data []byte) (ok bool, n int) {
 }
 
 func (sn Snake) String() string {
-	if len(sn) == 0 || len(sn[0]) == 0 || len(sn[0][0]) == 0{
+	if len(sn) == 0 || len(sn[0]) == 0 || len(sn[0][0]) == 0 {
 		return "EMPTY"
 	}