diff --git a/lib/library_test_utils.go b/lib/library_test_utils.go
index ff535cd329..79de3d1928 100644
--- a/lib/library_test_utils.go
+++ b/lib/library_test_utils.go
@@ -13,7 +13,6 @@ import "C"
 import (
 	"encoding/hex"
 	"encoding/json"
-	"fmt"
 	"io/ioutil"
 	"math/big"
 	"os"