diff --git a/test/Unit/Password/Implementation/SHA256Test.php b/test/Unit/Password/Implementation/SHA256Test.php
index 120d88c..636a6d3 100644
--- a/test/Unit/Password/Implementation/SHA256Test.php
+++ b/test/Unit/Password/Implementation/SHA256Test.php
@@ -20,15 +20,15 @@ public static function provideTestDetect() {
             array('$2$07$usesomesillystringfore2uDLvp1Ii2e./U9C8sBjqp8I90dH6hi', false),
             array(SHA256::getPrefix() . '07$usesome illystringfore2uDLvp1Ii2e./U9C8sBjqp8I90dH6hi', false),
             array(SHA256::getPrefix() . '01$usesomesillystringfore2uDLvp1Ii2e./U9C8sBjqp8I90dH6hi', false),
-
+            array(SHA256::getPrefix() . "\xE4\"|\xF5|\x08\xC8'\xF054:>\x13\xCB\xED\$6I5JMX./GN9KGHTtvHwvp3mxkNv/Ni7/jomOEBgsiM.", true)
         );
     }
 
     public static function provideTestCreate() {
         return array(
-            array(1000, 'foo', SHA256::getPrefix() . 'rounds=1000$................$expjG7P4AN4svmCMHxzkAc.s8gNGp0fu4bYVVY8iQo1'),
-            array(1000, 'bar', SHA256::getPrefix() . 'rounds=1000$................$NYlBKYVTrvSD1CYbsBDngbAm7kyAJk/D9XX.3528r05'),
-            array(1000, 'baz', SHA256::getPrefix() . 'rounds=1000$................$sN32z5PIeyCOerA52tXRmNvbdcwPd/FqWAmZelaX9z6'),
+            array(1000, 'foo', SHA256::getPrefix() . "rounds=1000\$\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\$AaIctt3o2mZFLme8WGmPB4yQUd7uV7PT7spV8CJvXA1"),
+            array(1000, 'bar', SHA256::getPrefix() . "rounds=1000\$\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\$3MGN/aM/1YdTG3AV4IyJq5QEM6zNBDDaLh.rGS/nHI8"),
+            array(1000, 'baz', SHA256::getPrefix() . "rounds=1000\$\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\$BhLh/zh5GXbIIqmxFpzISUtZbRy9bhefHr9pc.4ri3A"),
         );
     }
 
@@ -149,7 +149,7 @@ public function testVerifyFailException($iterations, $pass, $expect) {
 
     protected function getSHA256MockInstance($iterations) {
         $gen = $this->getRandomGenerator(function($size) {
-            return str_repeat(chr(0), $size);
+            return str_repeat(chr(1), $size);
         });
         return new SHA256(array('rounds' => $iterations), $gen);
     }
diff --git a/test/Unit/Password/Implementation/SHA512Test.php b/test/Unit/Password/Implementation/SHA512Test.php
index ff4274d..ee8ce17 100644
--- a/test/Unit/Password/Implementation/SHA512Test.php
+++ b/test/Unit/Password/Implementation/SHA512Test.php
@@ -20,15 +20,15 @@ public static function provideTestDetect() {
             array('$2$07$usesomesillystringfore2uDLvp1Ii2e./U9C8sBjqp8I90dH6hi', false),
             array(SHA512::getPrefix() . '07$usesome illystringfore2uDLvp1Ii2e./U9C8sBjqp8I90dH6hi', false),
             array(SHA512::getPrefix() . '01$usesomesillystringfore2uDLvp1Ii2e./U9C8sBjqp8I90dH6hi', false),
-
+            array(SHA512::getPrefix() . "\xC2?<j\x9A\xE0\xC4\xFCK\x8F\xFD\x87csaO\$Oca/TbK.iCdURjqXCnoIyDNggbVF1FWwjxxUYRuYm6HAPPmQSDxWa3fSgzcPsTyVdjBv4JLBlj4c13YLOpP5f/", true),
         );
     }
 
     public static function provideTestCreate() {
         return array(
-            array(1000, 'foo', SHA512::getPrefix() . 'rounds=1000$................$DzEAWetj/cXAPD/tGmEgpqyosAIZjLaRQI5DKcZYKSGFbk.mGzvRkDy3skMGqnkS4jRvrFjObXjiv.i5Bnob41'),
-            array(1000, 'bar', SHA512::getPrefix() . 'rounds=1000$................$lKPnJbXtGAHAid5g7OPcHO3GZjaKv4osoaSPnNAq./mZ4dyGoq9IbAG8d9fcTJ1cxvEALMPki.mbzmNEHjY9b1'),
-            array(1000, 'baz', SHA512::getPrefix() . 'rounds=1000$................$WZTe6NH6a0MA4vcOjJ9nKZP2hLvr9GhPvYqlOargbJNpzQaluc5sEe.Ep/PF2D79haaMPsFRGsnA2YEW3d7wx1'),
+            array(1000, 'foo', SHA512::getPrefix() . "rounds=1000\$\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\$5yUq/cJAngIZ0sWBdbZ50jTCUDrMwA08nvnCWUiaCsi6PEuPaUoY8K7MS8IbLj8uE640rjnIF84x1ayZ5UDbq/"),
+            array(1000, 'bar', SHA512::getPrefix() . "rounds=1000\$\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\$CtKbNszU3gfdh4/aF/V5RNT2a8qljIs9JTINsFConxEvFO3ubFxUqojuOzxCPtqNtdkko/CYO3IGaiAn7ZxE20"),
+            array(1000, 'baz', SHA512::getPrefix() . "rounds=1000\$\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\$O6m4HWAD6AJo9oSPerzqDlBtGYQytvvtdz98lDwjxOmnlmZodLgtntMYN5l45qfWX54CqDJeS6AGQwXRh2/Ap."),
         );
     }
 
@@ -150,7 +150,7 @@ public function testVerifyFailException($iterations, $pass, $expect) {
 
     protected function getSHA512MockInstance($iterations) {
         $gen = $this->getRandomGenerator(function($size) {
-            return str_repeat(chr(0), $size);
+            return str_repeat(chr(1), $size);
         });
         return new SHA512(array('rounds' => $iterations), $gen);
     }