diff --git a/tests/FunctionalSecureServerTest.php b/tests/FunctionalSecureServerTest.php
index 4caee701..c4963c67 100644
--- a/tests/FunctionalSecureServerTest.php
+++ b/tests/FunctionalSecureServerTest.php
@@ -718,21 +718,4 @@ private function createPromiseForEvent(EventEmitterInterface $emitter, $event, $
             });
         });
     }
-
-    private function supportsTls13()
-    {
-        // TLS 1.3 is supported as of OpenSSL 1.1.1 (https://www.openssl.org/blog/blog/2018/09/11/release111/)
-        // The OpenSSL library version can only be obtained by parsing output from phpinfo().
-        // OPENSSL_VERSION_TEXT refers to header version which does not necessarily match actual library version
-        // see php -i | grep OpenSSL
-        // OpenSSL Library Version => OpenSSL 1.1.1  11 Sep 2018
-        ob_start();
-        phpinfo(INFO_MODULES);
-        $info = ob_get_clean();
-
-        if (preg_match('/OpenSSL Library Version => OpenSSL (\S+)/', $info, $match)) {
-            return version_compare($match[1], '1.1.1', '>=');
-        }
-        return false;
-    }
 }
diff --git a/tests/SecureIntegrationTest.php b/tests/SecureIntegrationTest.php
index 8c9ba14d..371bca72 100644
--- a/tests/SecureIntegrationTest.php
+++ b/tests/SecureIntegrationTest.php
@@ -93,6 +93,21 @@ public function testSendSmallDataToServerReceivesOneChunk()
 
     public function testSendDataWithEndToServerReceivesAllData()
     {
+        // PHP can report EOF on TLS 1.3 stream before consuming all data, so
+        // we explicitly use older TLS version instead. Selecting TLS version
+        // requires PHP 5.6+, so skip legacy versions if TLS 1.3 is supported.
+        // Continue if TLS 1.3 is not supported anyway.
+        if ($this->supportsTls13()) {
+            if (!defined('STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT')) {
+                $this->markTestSkipped('TLS 1.3 supported, but this legacy PHP version does not support explicit choice');
+            }
+
+            $this->connector = new SecureConnector(new TcpConnector($this->loop), $this->loop, array(
+                'verify_peer' => false,
+                'crypto_method' => STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT
+            ));
+        }
+
         $disconnected = new Deferred();
         $this->server->on('connection', function (ConnectionInterface $peer) use ($disconnected) {
             $received = '';
@@ -113,6 +128,7 @@ public function testSendDataWithEndToServerReceivesAllData()
         // await server to report connection "close" event
         $received = Block\await($disconnected->promise(), $this->loop, self::TIMEOUT);
 
+        $this->assertEquals(strlen($data), strlen($received));
         $this->assertEquals($data, $received);
     }
 
@@ -136,6 +152,7 @@ public function testSendDataWithoutEndingToServerReceivesAllData()
 
         $client->close();
 
+        $this->assertEquals(strlen($data), strlen($received));
         $this->assertEquals($data, $received);
     }
 
diff --git a/tests/TestCase.php b/tests/TestCase.php
index e87fc2f1..b9b383af 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -98,4 +98,21 @@ public function setExpectedException($exception, $exceptionMessage = '', $except
             parent::setExpectedException($exception, $exceptionMessage, $exceptionCode);
         }
     }
+
+    protected function supportsTls13()
+    {
+        // TLS 1.3 is supported as of OpenSSL 1.1.1 (https://www.openssl.org/blog/blog/2018/09/11/release111/)
+        // The OpenSSL library version can only be obtained by parsing output from phpinfo().
+        // OPENSSL_VERSION_TEXT refers to header version which does not necessarily match actual library version
+        // see php -i | grep OpenSSL
+        // OpenSSL Library Version => OpenSSL 1.1.1  11 Sep 2018
+        ob_start();
+        phpinfo(INFO_MODULES);
+        $info = ob_get_clean();
+
+        if (preg_match('/OpenSSL Library Version => OpenSSL ([\d\.]+)/', $info, $match)) {
+            return version_compare($match[1], '1.1.1', '>=');
+        }
+        return false;
+    }
 }