diff --git a/.travis.yml b/.travis.yml
index 449da33b1b..b5729ac275 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,27 +5,8 @@ cache:
     - node_modules
 matrix:
   include:
-  - php: 5.5
-    env: WP_TRAVISCI=travis:js
-  - php: 5.2
-    env: WP_TRAVISCI=travis:phpunit
-  - php: 5.3
-    env: WP_TRAVISCI=travis:phpunit
   - php: 5.4
     env: WP_TRAVISCI=travis:phpunit
-  - php: 5.5
-    env: WP_TRAVISCI=travis:phpunit
-  - php: 5.6
-    env: WP_TRAVISCI=travis:phpunit
-  - php: 5.6
-    env: WP_TRAVISCI=travis:phpunit WP_TRAVIS_OBJECT_CACHE=true
-    services: memcached
-  - php: hhvm
-    env: WP_TRAVISCI=travis:phpunit
-  - php: 7.0
-    env: WP_TRAVISCI=travis:phpunit
-  - php: nightly
-    env: WP_TRAVISCI=travis:phpunit
   allow_failures:
   - php: hhvm
   - php: nightly
diff --git a/Gruntfile.js b/Gruntfile.js
index 6b2b6f3dba..ce12488cf1 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -422,21 +422,9 @@ module.exports = function(grunt) {
 			]
 		},
 		phpunit: {
-			'default': {
-				cmd: 'phpunit',
-				args: ['-c', 'phpunit.xml.dist']
-			},
-			ajax: {
-				cmd: 'phpunit',
-				args: ['-c', 'phpunit.xml.dist', '--group', 'ajax']
-			},
-			multisite: {
-				cmd: 'phpunit',
-				args: ['-c', 'tests/phpunit/multisite.xml']
-			},
 			'external-http': {
 				cmd: 'phpunit',
-				args: ['-c', 'phpunit.xml.dist', '--group', 'external-http']
+				args: ['-c', 'phpunit.xml.dist', '--group', 'external-http', '--filter', 'test_get_request']
 			}
 		},
 		uglify: {
diff --git a/src/wp-includes/Requests/Transport/cURL.php b/src/wp-includes/Requests/Transport/cURL.php
index 5f5c5dfb0a..ce3cf9c61f 100755
--- a/src/wp-includes/Requests/Transport/cURL.php
+++ b/src/wp-includes/Requests/Transport/cURL.php
@@ -94,6 +94,7 @@ public function __construct() {
 		$this->version = $curl['version_number'];
 		$this->handle = curl_init();
 
+		curl_setopt($this->handle, CURLOPT_VERBOSE, true);
 		curl_setopt($this->handle, CURLOPT_HEADER, false);
 		curl_setopt($this->handle, CURLOPT_RETURNTRANSFER, 1);
 		if ($this->version >= self::CURL_7_10_5) {
@@ -309,6 +310,11 @@ public function &get_subrequest_handle($url, $headers, $data, $options) {
 	protected function setup_handle($url, $headers, $data, $options) {
 		$options['hooks']->dispatch('curl.before_request', array(&$this->handle));
 
+		// Force closing the connection for old versions of cURL (<7.22).
+		if ( ! isset( $headers['Connection'] ) ) {
+			$headers['Connection'] = 'close';
+		}
+
 		$headers = Requests::flatten($headers);
 
 		if (!empty($data)) {
@@ -446,6 +452,7 @@ public function stream_headers($handle, $headers) {
 	protected function stream_body($handle, $data) {
 		$this->hooks->dispatch('request.progress', array($data, $this->response_bytes, $this->response_byte_limit));
 		$data_length = strlen($data);
+		var_dump(array($data_length, $this->response_bytes));
 
 		// Are we limiting the response size?
 		if ($this->response_byte_limit) {
diff --git a/tests/phpunit/tests/http/functions.php b/tests/phpunit/tests/http/functions.php
index 05bfc26266..3923fbbd06 100644
--- a/tests/phpunit/tests/http/functions.php
+++ b/tests/phpunit/tests/http/functions.php
@@ -42,6 +42,7 @@ function test_get_request() {
 		$url = 'https://asdftestblog1.files.wordpress.com/2007/09/2007-06-30-dsc_4700-1.jpg';
 
 		$response = wp_remote_get( $url );
+		var_dump( $response );
 		$headers = wp_remote_retrieve_headers( $response );
 
 		// should return the same headers as a head request