diff --git a/test/sma/common.sh b/test/sma/common.sh
index c6d6e1b7c..3ba0098ef 100644
--- a/test/sma/common.sh
+++ b/test/sma/common.sh
@@ -32,7 +32,7 @@ get_cipher() {
 }
 
 format_key() {
-	base64 <(echo -n "$1")
+	base64 -w 0 <(echo -n "$1")
 }
 
 uuid2nguid() {