diff --git a/tests/Struct.php b/tests/Struct.php
index c298f86..a935345 100644
--- a/tests/Struct.php
+++ b/tests/Struct.php
@@ -37,15 +37,15 @@ class Struct
      * Packs data into bytes
      *
      * @param	$format	    Format string
-     * @param	...$data	Parameters to encode
+     * @param	$data	Parameters to encode
      *
      * @return Encoded data
      */
-    public static function pack($format, ...$data)
+    public static function pack($format, $data)
     {
         self::constructor();
 
-        return self::$struct->pack($format, ...$data);
+        return self::$struct->pack($format, $data);
     }
 
     /**
diff --git a/tests/StructClass.php b/tests/StructClass.php
index f910e4d..2171bed 100644
--- a/tests/StructClass.php
+++ b/tests/StructClass.php
@@ -38,11 +38,11 @@ class StructClass
      *
      * Packs data into bytes
      *
-     * @param	...$data	Parameters to encode (may contain format string)
+     * @param	$data	Parameters to encode (may contain format string)
      *
      * @return Encoded data
      */
-    public function pack(...$data)
+    public function pack($data)
     {
         if ($this->format === null) {
             $format = array_shift($data);
@@ -50,7 +50,7 @@ class StructClass
             $format = $this->format;
         }
 
-        return $this->struct->pack($format, ...$data);
+        return $this->struct->pack($format, $data);
     }
 
     /**
diff --git a/tests/StructTools.php b/tests/StructTools.php
index be79a51..3a107d2 100644
--- a/tests/StructTools.php
+++ b/tests/StructTools.php
@@ -249,12 +249,13 @@ class StructTools
      * Packs data into bytes
      *
      * @param	$format		Format string
-     * @param	...$data	Parameters to encode
+     * @param	$data	Parameters to encode
      *
      * @return Encoded data
      */
-    public function pack($format, ...$data)
+    public function pack($format, $data)
     {
+        $data = [$data];
         $format = $this->padformat($format);
         $result = null; // Data to return
         $size = $this->calcsize($format);
diff --git a/tests/testing.php b/tests/testing.php
index 20b748a..f472e00 100755
--- a/tests/testing.php
+++ b/tests/testing.php
@@ -80,7 +80,7 @@ function random_string($length)
 }
 function gen_payload()
 {
-    return \danog\PHP\Struct::pack('<Bqqii', 10, 0, (int) (time() << 32), 20, 1615239032).random_string(16);
+    return chr(10).str_repeat(chr(0), 8).\danog\PHP\Struct::pack('<q', (int) (time() << 32)).pack('VV', 20, 1615239032).random_string(16);
 }
 
 echo PHP_EOL.'----------- HUGE SEMIPRIME TESTS (100 semiprimes) ----------'.PHP_EOL;