diff --git a/src/Messaging/Protocol/Frame.php b/src/Messaging/Protocol/Frame.php
index 13e8bfb..fd767c4 100644
--- a/src/Messaging/Protocol/Frame.php
+++ b/src/Messaging/Protocol/Frame.php
@@ -377,6 +377,7 @@ class Frame implements FrameInterface {
 
         $byte_length = $this->getNumPayloadBytes();
         if ($this->bytesRecvd < 1 + $byte_length) {
+            $this->defPayLen = -1;
             throw new \UnderflowException('Not enough data buffered to determine payload length');
         }
 
diff --git a/tests/ab/clientRunner.php b/tests/ab/clientRunner.php
index 0b5f321..94109f2 100644
--- a/tests/ab/clientRunner.php
+++ b/tests/ab/clientRunner.php
@@ -8,6 +8,8 @@ require __DIR__ . '/AbConnectionContext.php';
 
 define('AGENT', 'RatchetRFC/0.0.0');
 
+$testServer = "127.0.0.1";
+
 
 class EmConnectionContext extends AbConnectionContext implements \Evenement\EventEmitterInterface, Ratchet\RFC6455\Messaging\Streaming\ContextInterface {
     use \Evenement\EventEmitterTrait;
@@ -39,10 +41,11 @@ $factory = new \React\SocketClient\Connector($loop, $dnsResolver);
 
 function getTestCases() {
     global $factory;
+    global $testServer;
 
     $deferred = new Deferred();
 
-    $factory->create('127.0.0.1', 9001)->then(function (\React\Stream\Stream $stream) use ($deferred) {
+    $factory->create($testServer, 9001)->then(function (\React\Stream\Stream $stream) use ($deferred) {
         $cn = new \Ratchet\RFC6455\Handshake\ClientNegotiator("/getCaseCount");
         $cnRequest = $cn->getRequest();
 
@@ -92,12 +95,13 @@ function getTestCases() {
 function runTest($case)
 {
     global $factory;
+    global $testServer;
 
     $casePath = "/runCase?case={$case}&agent=" . AGENT;
 
     $deferred = new Deferred();
 
-    $factory->create('127.0.0.1', 9001)->then(function (\React\Stream\Stream $stream) use ($deferred, $casePath, $case) {
+    $factory->create($testServer, 9001)->then(function (\React\Stream\Stream $stream) use ($deferred, $casePath, $case) {
         $cn = new \Ratchet\RFC6455\Handshake\ClientNegotiator($casePath);
         $cnRequest = $cn->getRequest();
 
@@ -145,10 +149,11 @@ function runTest($case)
 
 function createReport() {
     global $factory;
+    global $testServer;
 
     $deferred = new Deferred();
 
-    $factory->create('127.0.0.1', 9001)->then(function (\React\Stream\Stream $stream) use ($deferred) {
+    $factory->create($testServer, 9001)->then(function (\React\Stream\Stream $stream) use ($deferred) {
         $cn = new \Ratchet\RFC6455\Handshake\ClientNegotiator('/updateReports?agent=' . AGENT);
         $cnRequest = $cn->getRequest();
 
diff --git a/tests/ab/fuzzingserver.json b/tests/ab/fuzzingserver.json
index 29e9a22..70db183 100644
--- a/tests/ab/fuzzingserver.json
+++ b/tests/ab/fuzzingserver.json
@@ -5,7 +5,6 @@
 }
     , "outdir": "./reports/clients"
     , "cases": ["*"]
-    , "cases_failing": ["9.3.2", "9.3.3", "9.3.4", "9.4.2", "9.4.3", "9.4.4"]
     , "exclude-cases": ["12.*", "13.*"]
     , "exclude-agent-cases": {}
 }
\ No newline at end of file