diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3666cd47..6f9cfb41 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,11 +19,6 @@ jobs:
           - 7.3
           - 7.2
           - 7.1
-          - 7.0
-          - 5.6
-          - 5.5
-          - 5.4
-          - 5.3
     steps:
       - uses: actions/checkout@v4
       - uses: shivammathur/setup-php@v2
@@ -36,19 +31,3 @@ jobs:
         if: ${{ matrix.php >= 7.3 }}
       - run: vendor/bin/phpunit --coverage-text -c phpunit.xml.legacy
         if: ${{ matrix.php < 7.3 }}
-
-  PHPUnit-hhvm:
-    name: PHPUnit (HHVM)
-    runs-on: ubuntu-22.04
-    continue-on-error: true
-    steps:
-      - uses: actions/checkout@v4
-      - run: cp "$(which composer)" composer.phar && ./composer.phar self-update --2.2 # downgrade Composer for HHVM
-      - name: Run hhvm composer.phar install
-        uses: docker://hhvm/hhvm:3.30-lts-latest
-        with:
-          args: hhvm composer.phar install
-      - name: Run hhvm vendor/bin/phpunit
-        uses: docker://hhvm/hhvm:3.30-lts-latest
-        with:
-          args: hhvm vendor/bin/phpunit
diff --git a/README.md b/README.md
index 46da303d..9cdf7c09 100644
--- a/README.md
+++ b/README.md
@@ -2990,8 +2990,7 @@ composer require react/http:^3@dev
 See also the [CHANGELOG](CHANGELOG.md) for details about version upgrades.
 
 This project aims to run on any platform and thus does not require any PHP
-extensions and supports running on legacy PHP 5.3 through current PHP 8+ and
-HHVM.
+extensions and supports running on PHP 7.1 through current PHP 8+.
 It's *highly recommended to use the latest supported PHP version* for this project.
 
 ## Tests
diff --git a/composer.json b/composer.json
index 23783c0c..33919186 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
         }
     ],
     "require": {
-        "php": ">=5.3.0",
+        "php": ">=7.1",
         "evenement/evenement": "^3.0 || ^2.0 || ^1.0",
         "fig/http-message-util": "^1.1",
         "psr/http-message": "^1.0",
@@ -39,8 +39,8 @@
         "clue/http-proxy-react": "^1.8",
         "clue/reactphp-ssh-proxy": "^1.4",
         "clue/socks-react": "^1.4",
-        "phpunit/phpunit": "^9.6 || ^5.7 || ^4.8.36",
-        "react/async": "^4 || ^3 || ^2",
+        "phpunit/phpunit": "^9.6 || ^5.7",
+        "react/async": "^4 || ^3",
         "react/promise-stream": "^1.4",
         "react/promise-timer": "^1.9"
     },
diff --git a/phpunit.xml.legacy b/phpunit.xml.legacy
index 89161168..a018d7ab 100644
--- a/phpunit.xml.legacy
+++ b/phpunit.xml.legacy
@@ -2,7 +2,7 @@
 
 <!-- PHPUnit configuration file with old format for legacy PHPUnit -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/4.8/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/5.7/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          colors="true">
     <testsuites>
diff --git a/src/Io/ClientRequestStream.php b/src/Io/ClientRequestStream.php
index ff9bf2d4..3bdf9b1f 100644
--- a/src/Io/ClientRequestStream.php
+++ b/src/Io/ClientRequestStream.php
@@ -69,8 +69,7 @@ private function writeHead()
             }
         }
 
-        /** @var array $m legacy PHP 5.3 only */
-        if (!\preg_match('#^\S+ \S+ HTTP/1\.[01]\r\n#m', $headers) || \substr_count($headers, "\n") !== ($expected + 1) || (\PHP_VERSION_ID >= 50400 ? \preg_match_all(AbstractMessage::REGEX_HEADERS, $headers) : \preg_match_all(AbstractMessage::REGEX_HEADERS, $headers, $m)) !== $expected) {
+        if (!\preg_match('#^\S+ \S+ HTTP/1\.[01]\r\n#m', $headers) || \substr_count($headers, "\n") !== ($expected + 1) || \preg_match_all(AbstractMessage::REGEX_HEADERS, $headers) !== $expected) {
             $this->closeError(new \InvalidArgumentException('Unable to send request with invalid request headers'));
             return;
         }
diff --git a/src/Io/MultipartParser.php b/src/Io/MultipartParser.php
index 539107ae..c65bb655 100644
--- a/src/Io/MultipartParser.php
+++ b/src/Io/MultipartParser.php
@@ -36,7 +36,7 @@ final class MultipartParser
     /**
      * ini setting "max_input_vars"
      *
-     * Does not exist in PHP < 5.3.9 or HHVM, so assume PHP's default 1000 here.
+     * Assume PHP' default of 1000 here.
      *
      * @var int
      * @link http://php.net/manual/en/info.configuration.php#ini.max-input-vars
@@ -46,7 +46,7 @@ final class MultipartParser
     /**
      * ini setting "max_input_nesting_level"
      *
-     * Does not exist in HHVM, but assumes hard coded to 64 (PHP's default).
+     * Assume PHP's default of 64 here.
      *
      * @var int
      * @link http://php.net/manual/en/info.configuration.php#ini.max-input-nesting-level
@@ -81,14 +81,8 @@ final class MultipartParser
      */
     public function __construct($uploadMaxFilesize = null, $maxFileUploads = null)
     {
-        $var = \ini_get('max_input_vars');
-        if ($var !== false) {
-            $this->maxInputVars = (int)$var;
-        }
-        $var = \ini_get('max_input_nesting_level');
-        if ($var !== false) {
-            $this->maxInputNestingLevel = (int)$var;
-        }
+        $this->maxInputVars = (int) \ini_get('max_input_vars');
+        $this->maxInputNestingLevel = (int) \ini_get('max_input_nesting_level');
 
         if ($uploadMaxFilesize === null) {
             $uploadMaxFilesize = \ini_get('upload_max_filesize');
diff --git a/src/Io/StreamingServer.php b/src/Io/StreamingServer.php
index 143edaa8..eee9f900 100644
--- a/src/Io/StreamingServer.php
+++ b/src/Io/StreamingServer.php
@@ -346,8 +346,7 @@ public function handleResponse(ConnectionInterface $connection, ServerRequestInt
             }
         }
 
-        /** @var array $m legacy PHP 5.3 only */
-        if ($code < 100 || $code > 999 || \substr_count($headers, "\n") !== ($expected + 1) || (\PHP_VERSION_ID >= 50400 ? \preg_match_all(AbstractMessage::REGEX_HEADERS, $headers) : \preg_match_all(AbstractMessage::REGEX_HEADERS, $headers, $m)) !== $expected) {
+        if ($code < 100 || $code > 999 || \substr_count($headers, "\n") !== ($expected + 1) || \preg_match_all(AbstractMessage::REGEX_HEADERS, $headers) !== $expected) {
             $this->emit('error', array(new \InvalidArgumentException('Unable to send response with invalid response headers')));
             $this->writeError($connection, Response::STATUS_INTERNAL_SERVER_ERROR, $request);
             return;
diff --git a/src/Message/Response.php b/src/Message/Response.php
index fa6366ed..107508a9 100644
--- a/src/Message/Response.php
+++ b/src/Message/Response.php
@@ -151,8 +151,7 @@ public static function json($data)
             (\defined('JSON_PRETTY_PRINT') ? \JSON_PRETTY_PRINT | \JSON_UNESCAPED_SLASHES | \JSON_UNESCAPED_UNICODE : 0) | (\defined('JSON_PRESERVE_ZERO_FRACTION') ? \JSON_PRESERVE_ZERO_FRACTION : 0)
         );
 
-        // throw on error, now `false` but used to be `(string) "null"` before PHP 5.5
-        if ($json === false || (\PHP_VERSION_ID < 50500 && \json_last_error() !== \JSON_ERROR_NONE)) {
+        if ($json === false) {
             throw new \InvalidArgumentException(
                 'Unable to encode given data as JSON' . (\function_exists('json_last_error_msg') ? ': ' . \json_last_error_msg() : ''),
                 \json_last_error()
diff --git a/src/Message/Uri.php b/src/Message/Uri.php
index 4309bbed..6b77d3e7 100644
--- a/src/Message/Uri.php
+++ b/src/Message/Uri.php
@@ -45,16 +45,7 @@ final class Uri implements UriInterface
      */
     public function __construct($uri)
     {
-        // @codeCoverageIgnoreStart
-        if (\PHP_VERSION_ID < 50407 && \strpos($uri, '//') === 0) {
-            // @link https://3v4l.org/UrAQP
-            $parts = \parse_url('http:' . $uri);
-            unset($parts['schema']);
-        } else {
-            $parts = \parse_url($uri);
-        }
-        // @codeCoverageIgnoreEnd
-
+        $parts = \parse_url($uri);
         if ($parts === false || (isset($parts['scheme']) && !\preg_match('#^[a-z]+$#i', $parts['scheme'])) || (isset($parts['host']) && \preg_match('#[\s_%+]#', $parts['host']))) {
             throw new \InvalidArgumentException('Invalid URI given');
         }
diff --git a/tests/Client/FunctionalIntegrationTest.php b/tests/Client/FunctionalIntegrationTest.php
index 5405874e..6c49c127 100644
--- a/tests/Client/FunctionalIntegrationTest.php
+++ b/tests/Client/FunctionalIntegrationTest.php
@@ -134,9 +134,6 @@ public function testRequestLegacyHttpServerWithOnlyLineFeedReturnsSuccessfulResp
     /** @group internet */
     public function testSuccessfulResponseEmitsEnd()
     {
-        // max_nesting_level was set to 100 for PHP Versions < 5.4 which resulted in failing test for legacy PHP
-        ini_set('xdebug.max_nesting_level', 256);
-
         $client = new Client(new ClientConnectionManager(new Connector(), Loop::get()));
 
         $request = $client->request(new Request('GET', 'http://www.google.com/', array(), '', '1.0'));
@@ -155,9 +152,6 @@ public function testSuccessfulResponseEmitsEnd()
     /** @group internet */
     public function testCancelPendingConnectionEmitsClose()
     {
-        // max_nesting_level was set to 100 for PHP Versions < 5.4 which resulted in failing test for legacy PHP
-        ini_set('xdebug.max_nesting_level', 256);
-
         $client = new Client(new ClientConnectionManager(new Connector(), Loop::get()));
 
         $request = $client->request(new Request('GET', 'http://www.google.com/', array(), '', '1.0'));
diff --git a/tests/FunctionalBrowserTest.php b/tests/FunctionalBrowserTest.php
index 7b8ff84b..6a235703 100644
--- a/tests/FunctionalBrowserTest.php
+++ b/tests/FunctionalBrowserTest.php
@@ -389,10 +389,6 @@ public function testGetRequestWithResponseBufferExceededDuringStreamingRejects()
      */
     public function testCanAccessHttps()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         \React\Async\await($this->browser->get('https://www.google.com/'));
     }
 
@@ -401,10 +397,6 @@ public function testCanAccessHttps()
      */
     public function testVerifyPeerEnabledForBadSslRejects()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         $connector = new Connector(array(
             'tls' => array(
                 'verify_peer' => true
@@ -423,10 +415,6 @@ public function testVerifyPeerEnabledForBadSslRejects()
      */
     public function testVerifyPeerDisabledForBadSslResolves()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         $connector = new Connector(array(
             'tls' => array(
                 'verify_peer' => false
diff --git a/tests/FunctionalHttpServerTest.php b/tests/FunctionalHttpServerTest.php
index dcd79b3e..6b153b81 100644
--- a/tests/FunctionalHttpServerTest.php
+++ b/tests/FunctionalHttpServerTest.php
@@ -122,10 +122,6 @@ public function testPlainHttpOnRandomPortWithOtherHostHeaderTakesPrecedence()
 
     public function testSecureHttpsOnRandomPort()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         $connector = new Connector(array(
             'tls' => array('verify_peer' => false)
         ));
@@ -155,10 +151,6 @@ public function testSecureHttpsOnRandomPort()
 
     public function testSecureHttpsReturnsData()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         $http = new HttpServer(function (RequestInterface $request) {
             return new Response(
                 200,
@@ -193,10 +185,6 @@ public function testSecureHttpsReturnsData()
 
     public function testSecureHttpsOnRandomPortWithoutHostHeaderUsesSocketUri()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         $connector = new Connector(array(
             'tls' => array('verify_peer' => false)
         ));
@@ -284,10 +272,6 @@ public function testPlainHttpOnStandardPortWithoutHostHeaderReturnsUriWithNoPort
 
     public function testSecureHttpsOnStandardPortReturnsUriWithNoPort()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         try {
             $socket = new SocketServer('tls://127.0.0.1:443', array('tls' => array(
                 'local_cert' => __DIR__ . '/../examples/localhost.pem'
@@ -322,10 +306,6 @@ public function testSecureHttpsOnStandardPortReturnsUriWithNoPort()
 
     public function testSecureHttpsOnStandardPortWithoutHostHeaderUsesSocketUri()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         try {
             $socket = new SocketServer('tls://127.0.0.1:443', array('tls' => array(
                 'local_cert' => __DIR__ . '/../examples/localhost.pem'
@@ -389,10 +369,6 @@ public function testPlainHttpOnHttpsStandardPortReturnsUriWithPort()
 
     public function testSecureHttpsOnHttpStandardPortReturnsUriWithPort()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         try {
             $socket = new SocketServer('tls://127.0.0.1:80', array('tls' => array(
                 'local_cert' => __DIR__ . '/../examples/localhost.pem'
@@ -726,10 +702,6 @@ public function testConnectWithClosedThroughStreamReturnsNoData()
 
     public function testLimitConcurrentRequestsMiddlewareRequestStreamPausing()
     {
-        if (defined('HHVM_VERSION') && !interface_exists('React\Promise\PromisorInterface')) {
-            $this->markTestSkipped('Not supported on legacy HHVM with Promise v3');
-        }
-
         $connector = new Connector();
 
         $http = new HttpServer(
diff --git a/tests/HttpServerTest.php b/tests/HttpServerTest.php
index 72d48468..606c50a6 100644
--- a/tests/HttpServerTest.php
+++ b/tests/HttpServerTest.php
@@ -87,9 +87,6 @@ public function testSimpleRequestCallsRequestHandlerOnce()
         $this->assertSame(1, $called);
     }
 
-    /**
-     * @requires PHP 5.4
-     */
     public function testSimpleRequestCallsArrayRequestHandlerOnce()
     {
         $this->called = null;
diff --git a/tests/Io/MiddlewareRunnerTest.php b/tests/Io/MiddlewareRunnerTest.php
index 762d7bdb..e742ef6d 100644
--- a/tests/Io/MiddlewareRunnerTest.php
+++ b/tests/Io/MiddlewareRunnerTest.php
@@ -76,9 +76,6 @@ function (ServerRequestInterface $request) {
         $middleware($request);
     }
 
-    /**
-     * @requires PHP 7
-     */
     public function testThrowsIfHandlerThrowsThrowable()
     {
         $middleware = new MiddlewareRunner(array(
diff --git a/tests/Io/RequestHeaderParserTest.php b/tests/Io/RequestHeaderParserTest.php
index 87d6bf1b..1ed994b7 100644
--- a/tests/Io/RequestHeaderParserTest.php
+++ b/tests/Io/RequestHeaderParserTest.php
@@ -776,10 +776,6 @@ public function testServerParamsWillNotSetRemoteAddressForUnixDomainSockets()
 
     public function testServerParamsWontBeSetOnMissingUrls()
     {
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM');
-        }
-
         $request = null;
 
         $clock = $this->getMockBuilder('React\Http\Io\Clock')->disableOriginalConstructor()->getMock();
diff --git a/tests/Io/StreamingServerTest.php b/tests/Io/StreamingServerTest.php
index b4e3f2f8..152fece6 100644
--- a/tests/Io/StreamingServerTest.php
+++ b/tests/Io/StreamingServerTest.php
@@ -82,9 +82,6 @@ public function testRequestEventIsEmitted()
         $this->connection->emit('data', array($data));
     }
 
-    /**
-     * @requires PHP 5.4
-     */
     public function testRequestEventIsEmittedForArrayCallable()
     {
         $this->called = null;
@@ -2845,9 +2842,6 @@ function ($data) use (&$buffer) {
         $this->assertEquals('hello', $exception->getPrevious()->getMessage());
     }
 
-    /**
-     * @requires PHP 7
-     */
     public function testResponseThrowableThrowInCallBackFunctionWillResultInErrorMessage()
     {
         $server = new StreamingServer(Loop::get(), function (ServerRequestInterface $request) {
diff --git a/tests/Message/ResponseTest.php b/tests/Message/ResponseTest.php
index a9a244c2..1c70ae3a 100644
--- a/tests/Message/ResponseTest.php
+++ b/tests/Message/ResponseTest.php
@@ -97,9 +97,6 @@ public function testHtmlMethodReturnsHtmlResponse()
         $this->assertEquals('<!doctype html><body>Hello wörld!</body>', (string) $response->getBody());
     }
 
-    /**
-     * @requires PHP 5.4
-     */
     public function testJsonMethodReturnsPrettyPrintedJsonResponse()
     {
         $response = Response::json(array('text' => 'Hello wörld!'));
@@ -109,9 +106,6 @@ public function testJsonMethodReturnsPrettyPrintedJsonResponse()
         $this->assertEquals("{\n    \"text\": \"Hello wörld!\"\n}\n", (string) $response->getBody());
     }
 
-    /**
-     * @requires PHP 5.6.6
-     */
     public function testJsonMethodReturnsZeroFractionsInJsonResponse()
     {
         $response = Response::json(1.0);
@@ -132,11 +126,7 @@ public function testJsonMethodReturnsJsonTextForSimpleString()
 
     public function testJsonMethodThrowsForInvalidString()
     {
-        if (PHP_VERSION_ID < 50500) {
-            $this->setExpectedException('InvalidArgumentException', 'Unable to encode given data as JSON');
-        } else {
-            $this->setExpectedException('InvalidArgumentException', 'Unable to encode given data as JSON: Malformed UTF-8 characters, possibly incorrectly encoded');
-        }
+        $this->setExpectedException('InvalidArgumentException', 'Unable to encode given data as JSON: Malformed UTF-8 characters, possibly incorrectly encoded');
         Response::json("Hello w\xF6rld!");
     }
 
diff --git a/tests/Message/UriTest.php b/tests/Message/UriTest.php
index 05eec723..10f355df 100644
--- a/tests/Message/UriTest.php
+++ b/tests/Message/UriTest.php
@@ -130,11 +130,6 @@ public static function provideValidUris()
      */
     public function testToStringReturnsOriginalUriGivenToCtor($string)
     {
-        if (PHP_VERSION_ID < 50519 || (PHP_VERSION_ID < 50603 && PHP_VERSION_ID >= 50606)) {
-            // @link https://3v4l.org/HdoPG
-            $this->markTestSkipped('Empty password not supported on legacy PHP');
-        }
-
         $uri = new Uri($string);
 
         $this->assertEquals($string, (string) $uri);
diff --git a/tests/Middleware/LimitConcurrentRequestsMiddlewareTest.php b/tests/Middleware/LimitConcurrentRequestsMiddlewareTest.php
index faf27cb6..23455e6c 100644
--- a/tests/Middleware/LimitConcurrentRequestsMiddlewareTest.php
+++ b/tests/Middleware/LimitConcurrentRequestsMiddlewareTest.php
@@ -120,9 +120,6 @@ public function testThrowsExceptionDirectlyFromMiddlewareWhenBelowLimit()
         });
     }
 
-    /**
-     * @requires PHP 7
-     */
     public function testThrowsErrorDirectlyFromMiddlewareWhenBelowLimit()
     {
         $middleware = new LimitConcurrentRequestsMiddleware(1);
diff --git a/tests/Middleware/RequestBodyBufferMiddlewareTest.php b/tests/Middleware/RequestBodyBufferMiddlewareTest.php
index 40c23378..1c3b0b33 100644
--- a/tests/Middleware/RequestBodyBufferMiddlewareTest.php
+++ b/tests/Middleware/RequestBodyBufferMiddlewareTest.php
@@ -277,9 +277,6 @@ function (ServerRequestInterface $request) {
         $this->assertNull($exception->getPrevious());
     }
 
-    /**
-     * @requires PHP 7
-     */
     public function testBufferingRejectsWhenNextHandlerThrowsErrorWhenStreamEnds()
     {
         $stream = new ThroughStream();
diff --git a/tests/Middleware/RequestBodyParserMiddlewareTest.php b/tests/Middleware/RequestBodyParserMiddlewareTest.php
index 989abc81..b588bdd5 100644
--- a/tests/Middleware/RequestBodyParserMiddlewareTest.php
+++ b/tests/Middleware/RequestBodyParserMiddlewareTest.php
@@ -109,13 +109,6 @@ function (ServerRequestInterface $request) {
 
     public function testFormUrlencodedIgnoresBodyWithExcessiveNesting()
     {
-        // supported in all Zend PHP versions and HHVM
-        // ini setting does exist everywhere but HHVM: https://3v4l.org/hXLiK
-        // HHVM limits to 64 and returns an empty array structure: https://3v4l.org/j3DK2
-        if (defined('HHVM_VERSION')) {
-            $this->markTestSkipped('Not supported on HHVM (limited to depth 64, but keeps empty array structure)');
-        }
-
         $allowed = (int)ini_get('max_input_nesting_level');
 
         $middleware = new RequestBodyParserMiddleware();
@@ -144,12 +137,6 @@ function (ServerRequestInterface $request) {
 
     public function testFormUrlencodedTruncatesBodyWithExcessiveLength()
     {
-        // supported as of PHP 5.3.11, no HHVM support: https://3v4l.org/PiqnQ
-        // ini setting already exists in PHP 5.3.9: https://3v4l.org/VF6oV
-        if (defined('HHVM_VERSION') || PHP_VERSION_ID < 50311) {
-            $this->markTestSkipped('Not supported on HHVM and PHP < 5.3.11 (unlimited length)');
-        }
-
         $allowed = (int)ini_get('max_input_vars');
 
         $middleware = new RequestBodyParserMiddleware();
@@ -243,13 +230,7 @@ function (ServerRequestInterface $request) {
 
     public function testMultipartFormDataIgnoresFieldWithExcessiveNesting()
     {
-        // supported in all Zend PHP versions and HHVM
-        // ini setting does exist everywhere but HHVM: https://3v4l.org/hXLiK
-        // HHVM limits to 64 and otherwise returns an empty array structure
-        $allowed = (int)ini_get('max_input_nesting_level');
-        if ($allowed === 0) {
-            $allowed = 64;
-        }
+        $allowed = (int) ini_get('max_input_nesting_level');
 
         $middleware = new RequestBodyParserMiddleware();
 
@@ -278,12 +259,7 @@ function (ServerRequestInterface $request) {
 
     public function testMultipartFormDataTruncatesBodyWithExcessiveLength()
     {
-        // ini setting exists in PHP 5.3.9, not in HHVM: https://3v4l.org/VF6oV
-        // otherwise default to 1000 as implemented within
-        $allowed = (int)ini_get('max_input_vars');
-        if ($allowed === 0) {
-            $allowed = 1000;
-        }
+        $allowed = (int) ini_get('max_input_vars');
 
         $middleware = new RequestBodyParserMiddleware();
 
@@ -319,12 +295,7 @@ function (ServerRequestInterface $request) {
 
     public function testMultipartFormDataTruncatesExcessiveNumberOfEmptyFileUploads()
     {
-        // ini setting exists in PHP 5.3.9, not in HHVM: https://3v4l.org/VF6oV
-        // otherwise default to 1000 as implemented within
-        $allowed = (int)ini_get('max_input_vars');
-        if ($allowed === 0) {
-            $allowed = 1000;
-        }
+        $allowed = (int) ini_get('max_input_vars');
 
         $middleware = new RequestBodyParserMiddleware();
 
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 72b7be8d..88d8a3df 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -72,18 +72,12 @@ public function assertNotContainsString($needle, $haystack)
 
     public function setExpectedException($exception, $exceptionMessage = '', $exceptionCode = null)
     {
-        if (method_exists($this, 'expectException')) {
-            // PHPUnit 5+
-            $this->expectException($exception);
-            if ($exceptionMessage !== '') {
-                $this->expectExceptionMessage($exceptionMessage);
-            }
-            if ($exceptionCode !== null) {
-                $this->expectExceptionCode($exceptionCode);
-            }
-        } else {
-            // legacy PHPUnit 4
-            parent::setExpectedException($exception, $exceptionMessage, $exceptionCode);
+        $this->expectException($exception);
+        if ($exceptionMessage !== '') {
+            $this->expectExceptionMessage($exceptionMessage);
+        }
+        if ($exceptionCode !== null) {
+            $this->expectExceptionCode($exceptionCode);
         }
     }