diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index facac86..1950470 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -8,8 +8,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        # TODO Add 8.1 version as well
-        php-versions: ['5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
+        php-versions: ['5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
     name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
     steps:
       - uses: actions/checkout@v2
diff --git a/tests/AbstractConfigTest.php b/tests/AbstractConfigTest.php
index 8a16b46..69dda1e 100644
--- a/tests/AbstractConfigTest.php
+++ b/tests/AbstractConfigTest.php
@@ -139,7 +139,7 @@ public function testSetArray()
             'host' => 'localhost',
             'name' => 'mydatabase'
         ]);
-        $this->assertInternalType('array', $this->config->get('database'));
+        $this->assertIsArray($this->config->get('database'));
         $this->assertEquals('localhost', $this->config->get('database.host'));
     }
 
@@ -152,7 +152,7 @@ public function testCacheWithNestedArray()
             'host' => 'localhost',
             'name' => 'mydatabase'
         ]);
-        $this->assertInternalType('array', $this->config->get('database'));
+        $this->assertIsArray($this->config->get('database'));
         $this->config->set('database.host', '127.0.0.1');
         $expected = [
             'host' => '127.0.0.1',
@@ -218,7 +218,7 @@ public function testSetAndUnsetArray()
             'host' => 'localhost',
             'name' => 'mydatabase'
         ]);
-        $this->assertInternalType('array', $this->config->get('database'));
+        $this->assertIsArray($this->config->get('database'));
         $this->assertEquals('localhost', $this->config->get('database.host'));
         $this->config->set('database.host', null);
         $this->assertNull($this->config->get('database.host'));
diff --git a/tests/ConfigTest.php b/tests/ConfigTest.php
index 55d6840..bd049fb 100644
--- a/tests/ConfigTest.php
+++ b/tests/ConfigTest.php
@@ -4,12 +4,14 @@
 use Noodlehaus\Parser\Json as JsonParser;
 use Noodlehaus\Writer\Json as JsonWriter;
 use PHPUnit\Framework\TestCase;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
 
 /**
  * Generated by PHPUnit_SkeletonGenerator 1.2.1 on 2014-04-21 at 22:37:22.
  */
 class ConfigTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Config
      */
@@ -19,11 +21,11 @@ class ConfigTest extends TestCase
      * @covers                   Noodlehaus\Config::load()
      * @covers                   Noodlehaus\Config::loadFromFile()
      * @covers                   Noodlehaus\Config::getParser()
-     * @expectedException        Noodlehaus\Exception\UnsupportedFormatException
-     * @expectedExceptionMessage Unsupported configuration format
      */
     public function testLoadWithUnsupportedFormat()
     {
+        $this->expectException(\Noodlehaus\Exception\UnsupportedFormatException::class);
+        $this->expectExceptionMessage('Unsupported configuration format');
         $config = Config::load(__DIR__ . '/mocks/fail/error.lib');
         // $this->markTestIncomplete('Not yet implemented');
     }
@@ -32,11 +34,11 @@ public function testLoadWithUnsupportedFormat()
      * @covers                   Noodlehaus\Config::__construct()
      * @covers                   Noodlehaus\Config::loadFromFile()
      * @covers                   Noodlehaus\Config::getParser()
-     * @expectedException        Noodlehaus\Exception\UnsupportedFormatException
-     * @expectedExceptionMessage Unsupported configuration format
      */
     public function testConstructWithUnsupportedFormat()
     {
+        $this->expectException(\Noodlehaus\Exception\UnsupportedFormatException::class);
+        $this->expectExceptionMessage('Unsupported configuration format');
         $config = new Config(__DIR__ . '/mocks/fail/error.lib');
     }
 
@@ -46,11 +48,11 @@ public function testConstructWithUnsupportedFormat()
      * @covers                   Noodlehaus\Config::getParser()
      * @covers                   Noodlehaus\Config::getPathFromArray()
      * @covers                   Noodlehaus\Config::getValidPath()
-     * @expectedException        Noodlehaus\Exception\FileNotFoundException
-     * @expectedExceptionMessage Configuration file: [ladadeedee] cannot be found
      */
     public function testConstructWithInvalidPath()
     {
+        $this->expectException(\Noodlehaus\Exception\FileNotFoundException::class);
+        $this->expectExceptionMessage('Configuration file: [ladadeedee] cannot be found');
         $config = new Config('ladadeedee');
     }
 
@@ -60,10 +62,10 @@ public function testConstructWithInvalidPath()
      * @covers            Noodlehaus\Config::getParser()
      * @covers            Noodlehaus\Config::getPathFromArray()
      * @covers            Noodlehaus\Config::getValidPath()
-     * @expectedException Noodlehaus\Exception\EmptyDirectoryException
      */
     public function testConstructWithEmptyDirectory()
     {
+        $this->expectException(\Noodlehaus\Exception\EmptyDirectoryException::class);
         $config = new Config(__DIR__ . '/mocks/empty');
     }
 
@@ -91,10 +93,10 @@ public function testConstructWithArray()
      * @covers            Noodlehaus\Config::getParser()
      * @covers            Noodlehaus\Config::getPathFromArray()
      * @covers            Noodlehaus\Config::getValidPath()
-     * @expectedException Noodlehaus\Exception\FileNotFoundException
      */
     public function testConstructWithArrayWithNonexistentFile()
     {
+        $this->expectException(\Noodlehaus\Exception\FileNotFoundException::class);
         $paths = [__DIR__ . '/mocks/pass/config.xml', __DIR__ . '/mocks/pass/config3.json'];
         $config = new Config($paths);
 
diff --git a/tests/Parser/IniTest.php b/tests/Parser/IniTest.php
index 7d12a0d..35ec8c5 100644
--- a/tests/Parser/IniTest.php
+++ b/tests/Parser/IniTest.php
@@ -1,14 +1,16 @@
 <?php
 namespace Noodlehaus\Parser\Test;
 
-use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 use Noodlehaus\Parser\Ini;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
+use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 /**
  * Generated by PHPUnit_SkeletonGenerator 1.2.1 on 2014-04-21 at 22:37:22.
  */
 class IniTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Ini
      */
@@ -36,13 +38,13 @@ public function testGetSupportedExtensions()
     /**
      * @covers                   Noodlehaus\Parser\Ini::parseFile()
      * @covers                   Noodlehaus\Parser\Ini::parse()
-     * @expectedException        Noodlehaus\Exception\ParseException
-     * @expectedExceptionMessage No parsable content
      * Tests the case where an INI string contains no parsable data at all, resulting in parse_ini_string
      * returning NULL, but not setting an error retrievable by error_get_last()
      */
     public function testLoadInvalidIniGBH()
     {
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage('No parsable content');
         $this->ini->parseFile(__DIR__ . '/../mocks/fail/error2.ini');
     }
 
@@ -58,14 +60,8 @@ public function testLoadInvalidIni()
             $exceptionMessage = "syntax error, unexpected end of file, expecting ']' in Unknown on line 1";
         }
 
-        if (PHP_VERSION_ID < 50600 && PHP_VERSION_ID >= 50500) {
-            $this->setExpectedException(
-                '\Noodlehaus\Exception\ParseException', $exceptionMessage
-            );
-        } else {
-            $this->expectException(\Noodlehaus\Exception\ParseException::class);
-            $this->expectExceptionMessage($exceptionMessage);
-        }
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage($exceptionMessage);
         
         $this->ini->parseString(file_get_contents(__DIR__ . '/../mocks/fail/error.ini'));
     }
diff --git a/tests/Parser/JsonTest.php b/tests/Parser/JsonTest.php
index 7ae769b..7ce0bf1 100644
--- a/tests/Parser/JsonTest.php
+++ b/tests/Parser/JsonTest.php
@@ -1,14 +1,16 @@
 <?php
 namespace Noodlehaus\Parser\Test;
 
-use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 use Noodlehaus\Parser\Json;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
+use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 /**
  * Generated by PHPUnit_SkeletonGenerator 1.2.1 on 2014-04-21 at 22:37:22.
  */
 class JsonTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Json
      */
@@ -36,11 +38,11 @@ public function testGetSupportedExtensions()
     /**
      * @covers                   Noodlehaus\Parser\Json::parseFile()
      * @covers                   Noodlehaus\Parser\Json::parse()
-     * @expectedException        Noodlehaus\Exception\ParseException
-     * @expectedExceptionMessage Syntax error
      */
     public function testLoadInvalidJson()
     {
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage('Syntax error');
         $this->json->parseFile(__DIR__ . '/../mocks/fail/error.json');
     }
 
diff --git a/tests/Parser/PhpTest.php b/tests/Parser/PhpTest.php
index d334fc8..0d27e0d 100644
--- a/tests/Parser/PhpTest.php
+++ b/tests/Parser/PhpTest.php
@@ -1,14 +1,16 @@
 <?php
 namespace Noodlehaus\Parser\Test;
 
-use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 use Noodlehaus\Parser\Php;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
+use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 /**
  * Generated by PHPUnit_SkeletonGenerator 1.2.1 on 2014-04-21 at 22:37:22.
  */
 class PhpTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Php
      */
@@ -36,32 +38,32 @@ public function testGetSupportedExtensions()
     /**
      * @covers                   Noodlehaus\Parser\Php::parseFile()
      * @covers                   Noodlehaus\Parser\Php::parse()
-     * @expectedException        Noodlehaus\Exception\UnsupportedFormatException
-     * @expectedExceptionMessage PHP data does not return an array
      */
     public function testLoadInvalidPhp()
     {
+        $this->expectException(\Noodlehaus\Exception\UnsupportedFormatException::class);
+        $this->expectExceptionMessage('PHP data does not return an array');
         $this->php->parseFile(__DIR__ . '/../mocks/fail/error.php');
     }
 
     /**
      * @covers                   Noodlehaus\Parser\Php::parseFile()
-     * @expectedException        Noodlehaus\Exception\ParseException
-     * @expectedExceptionMessage PHP file threw an exception
      */
     public function testLoadExceptionalPhpFile()
     {
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage('PHP file threw an exception');
         $this->php->parseFile(__DIR__ . '/../mocks/fail/error-exception.php');
     }
 
     /**
      * @covers                   Noodlehaus\Parser\Php::parseString()
      * @covers                   Noodlehaus\Parser\Php::isolate()
-     * @expectedException        Noodlehaus\Exception\ParseException
-     * @expectedExceptionMessage PHP string threw an exception
      */
     public function testLoadExceptionalPhpString()
     {
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage('PHP string threw an exception');
         $this->php->parseString(file_get_contents(__DIR__ . '/../mocks/fail/error-exception.php'));
     }
 
diff --git a/tests/Parser/SerializeTest.php b/tests/Parser/SerializeTest.php
index 922b15e..5a6d4c4 100644
--- a/tests/Parser/SerializeTest.php
+++ b/tests/Parser/SerializeTest.php
@@ -1,14 +1,16 @@
 <?php
 namespace Noodlehaus\Parser\Test;
 
-use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 use Noodlehaus\Parser\Serialize;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
+use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 /**
  * Generated by PHPUnit_SkeletonGenerator 1.2.1 on 2014-04-21 at 22:37:22.
  */
 class SerializeTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Serialize
      */
@@ -36,11 +38,11 @@ public function testGetSupportedExtensions()
     /**
      * @covers                   Noodlehaus\Parser\Serialize::parseFile()
      * @covers                   Noodlehaus\Parser\Serialize::parse()
-     * @expectedException        Noodlehaus\Exception\ParseException
-     * @expectedExceptionMessage unserialize(): Error at offset 57 of 58 bytes
      */
     public function testLoadInvalidSerialize()
     {
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage('unserialize(): Error at offset 57 of 58 bytes');
         $this->serialize->parseFile(__DIR__ . '/../mocks/fail/error.txt');
     }
 
diff --git a/tests/Parser/XmlTest.php b/tests/Parser/XmlTest.php
index c825525..37b1a91 100644
--- a/tests/Parser/XmlTest.php
+++ b/tests/Parser/XmlTest.php
@@ -1,14 +1,16 @@
 <?php
 namespace Noodlehaus\Parser\Test;
 
-use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 use Noodlehaus\Parser\Xml;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
+use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 /**
  * Generated by PHPUnit_SkeletonGenerator 1.2.1 on 2014-04-21 at 22:37:22.
  */
 class XmlTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Xml
      */
@@ -36,11 +38,11 @@ public function testGetSupportedExtensions()
     /**
      * @covers                   Noodlehaus\Parser\Xml::parseFile()
      * @covers                   Noodlehaus\Parser\Xml::parse()
-     * @expectedException        Noodlehaus\Exception\ParseException
-     * @expectedExceptionMessage Opening and ending tag mismatch: name line 4
      */
     public function testLoadInvalidXml()
     {
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage('Opening and ending tag mismatch: name line 4');
         $this->xml->parseFile(__DIR__ . '/../mocks/fail/error.xml');
     }
 
diff --git a/tests/Parser/YamlTest.php b/tests/Parser/YamlTest.php
index 9c1b0d6..a4f14f1 100644
--- a/tests/Parser/YamlTest.php
+++ b/tests/Parser/YamlTest.php
@@ -1,14 +1,16 @@
 <?php
 namespace Noodlehaus\Parser\Test;
 
-use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 use Noodlehaus\Parser\Yaml;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
+use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 /**
  * Generated by PHPUnit_SkeletonGenerator 1.2.1 on 2014-04-21 at 22:37:22.
  */
 class YamlTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Yaml
      */
@@ -36,22 +38,22 @@ public function testGetSupportedExtensions()
     /**
      * @covers                   Noodlehaus\Parser\Yaml::parseFile()
      * @covers                   Noodlehaus\Parser\Yaml::parse()
-     * @expectedException        Noodlehaus\Exception\ParseException
-     * @expectedExceptionMessage Error parsing YAML file
      */
     public function testLoadInvalidYamlFile()
     {
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage('Error parsing YAML file');
         $this->yaml->parseFile(__DIR__ . '/../mocks/fail/error.yaml');
     }
 
     /**
      * @covers                   Noodlehaus\Parser\Yaml::parseString()
      * @covers                   Noodlehaus\Parser\Yaml::parse()
-     * @expectedException        Noodlehaus\Exception\ParseException
-     * @expectedExceptionMessage Error parsing YAML string
      */
     public function testLoadInvalidYamlString()
     {
+        $this->expectException(\Noodlehaus\Exception\ParseException::class);
+        $this->expectExceptionMessage('Error parsing YAML string');
         $this->yaml->parseString(file_get_contents(__DIR__ . '/../mocks/fail/error.yaml'));
     }
 
diff --git a/tests/Writer/IniTest.php b/tests/Writer/IniTest.php
index 3483596..dfc7eed 100644
--- a/tests/Writer/IniTest.php
+++ b/tests/Writer/IniTest.php
@@ -3,10 +3,12 @@
 namespace Noodlehaus\Writer\Test;
 
 use Noodlehaus\Writer\Ini;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
 use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 class IniTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Ini
      */
@@ -97,11 +99,11 @@ public function testWriteIni()
      * @covers Noodlehaus\Writer\Ini::toString()
      * @covers Noodlehaus\Writer\Ini::toFile()
      * @covers Noodlehaus\Writer\Ini::toINI()
-     * @expectedException        Noodlehaus\Exception\WriteException
-     * @expectedExceptionMessage There was an error writing the file
      */
     public function testUnwritableFile()
     {
+        $this->expectException(\Noodlehaus\Exception\WriteException::class);
+        $this->expectExceptionMessage('There was an error writing the file');
         chmod($this->temp_file, 0444);
 
         $this->writer->toFile($this->data, $this->temp_file);
diff --git a/tests/Writer/JsonTest.php b/tests/Writer/JsonTest.php
index 64970a8..1908990 100644
--- a/tests/Writer/JsonTest.php
+++ b/tests/Writer/JsonTest.php
@@ -3,10 +3,12 @@
 namespace Noodlehaus\Writer\Test;
 
 use Noodlehaus\Writer\Json;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
 use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 class JsonTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Json
      */
@@ -90,11 +92,11 @@ public function testWriteJson()
     /**
      * @covers Noodlehaus\Writer\Json::toString()
      * @covers Noodlehaus\Writer\Json::toFile()
-     * @expectedException        Noodlehaus\Exception\WriteException
-     * @expectedExceptionMessage There was an error writing the file
      */
     public function testUnwritableFile()
     {
+        $this->expectException(\Noodlehaus\Exception\WriteException::class);
+        $this->expectExceptionMessage('There was an error writing the file');
         chmod($this->temp_file, 0444);
 
         $this->writer->toFile($this->data, $this->temp_file);
diff --git a/tests/Writer/PropertiesTest.php b/tests/Writer/PropertiesTest.php
index 7645568..c4db878 100644
--- a/tests/Writer/PropertiesTest.php
+++ b/tests/Writer/PropertiesTest.php
@@ -3,10 +3,12 @@
 namespace Noodlehaus\Writer\Test;
 
 use Noodlehaus\Writer\Properties;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
 use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 class PropertiesTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Properties
      */
@@ -98,11 +100,11 @@ public function testWriteProperties()
      * @covers Noodlehaus\Writer\Properties::toString()
      * @covers Noodlehaus\Writer\Properties::toFile()
      * @covers Noodlehaus\Writer\Properties::toProperties()
-     * @expectedException        Noodlehaus\Exception\WriteException
-     * @expectedExceptionMessage There was an error writing the file
      */
     public function testUnwritableFile()
     {
+        $this->expectException(\Noodlehaus\Exception\WriteException::class);
+        $this->expectExceptionMessage('There was an error writing the file');
         chmod($this->temp_file, 0444);
 
         $this->writer->toFile($this->data, $this->temp_file);
diff --git a/tests/Writer/SerializeTest.php b/tests/Writer/SerializeTest.php
index 22b7e69..7af530d 100644
--- a/tests/Writer/SerializeTest.php
+++ b/tests/Writer/SerializeTest.php
@@ -3,10 +3,12 @@
 namespace Noodlehaus\Writer\Test;
 
 use Noodlehaus\Writer\Serialize;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
 use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 class SerializeTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Serialize
      */
@@ -90,11 +92,11 @@ public function testWriteSerialize()
     /**
      * @covers Noodlehaus\Writer\Serialize::toString()
      * @covers Noodlehaus\Writer\Serialize::toFile()
-     * @expectedException        Noodlehaus\Exception\WriteException
-     * @expectedExceptionMessage There was an error writing the file
      */
     public function testUnwritableFile()
     {
+        $this->expectException(\Noodlehaus\Exception\WriteException::class);
+        $this->expectExceptionMessage('There was an error writing the file');
         chmod($this->temp_file, 0444);
 
         $this->writer->toFile($this->data, $this->temp_file);
diff --git a/tests/Writer/XmlTest.php b/tests/Writer/XmlTest.php
index c3fda63..68fc972 100644
--- a/tests/Writer/XmlTest.php
+++ b/tests/Writer/XmlTest.php
@@ -3,10 +3,12 @@
 namespace Noodlehaus\Writer\Test;
 
 use Noodlehaus\Writer\Xml;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
 use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 class XmlTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Xml
      */
@@ -95,11 +97,11 @@ public function testWriteXml()
     /**
      * @covers Noodlehaus\Writer\Xml::toFile()
      * @covers Noodlehaus\Writer\Xml::toXML()
-     * @expectedException        Noodlehaus\Exception\WriteException
-     * @expectedExceptionMessage There was an error writing the file
      */
     public function testUnwritableFile()
     {
+        $this->expectException(\Noodlehaus\Exception\WriteException::class);
+        $this->expectExceptionMessage('There was an error writing the file');
         chmod($this->temp_file, 0444);
 
         $this->writer->toFile($this->data, $this->temp_file);
diff --git a/tests/Writer/YamlTest.php b/tests/Writer/YamlTest.php
index 7ed316d..aa0db55 100644
--- a/tests/Writer/YamlTest.php
+++ b/tests/Writer/YamlTest.php
@@ -3,10 +3,12 @@
 namespace Noodlehaus\Writer\Test;
 
 use Noodlehaus\Writer\Yaml;
+use Yoast\PHPUnitPolyfills\Polyfills\ExpectException;
 use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
 class YamlTest extends TestCase
 {
+    use ExpectException;
     /**
      * @var Yaml
      */
@@ -99,11 +101,11 @@ public function testWriteYaml()
     /**
      * @covers Noodlehaus\Writer\Yaml::toString()
      * @covers Noodlehaus\Writer\Yaml::toFile()
-     * @expectedException        Noodlehaus\Exception\WriteException
-     * @expectedExceptionMessage There was an error writing the file
      */
     public function testUnwritableFile()
     {
+        $this->expectException(\Noodlehaus\Exception\WriteException::class);
+        $this->expectExceptionMessage('There was an error writing the file');
         chmod($this->temp_file, 0444);
 
         $this->writer->toFile($this->data, $this->temp_file);