diff --git a/test/Twig/Tests/Cache/FilesystemTest.php b/test/Twig/Tests/Cache/FilesystemTest.php
index 4738f77e5..d3b895946 100644
--- a/test/Twig/Tests/Cache/FilesystemTest.php
+++ b/test/Twig/Tests/Cache/FilesystemTest.php
@@ -11,10 +11,11 @@ namespace Twig\Tests\Cache;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Cache\FilesystemCache;
 use Twig\Tests\FilesystemHelper;
 
-class FilesystemTest extends \PHPUnit\Framework\TestCase
+class FilesystemTest extends TestCase
 {
     private $classname;
     private $directory;
diff --git a/test/Twig/Tests/CompilerTest.php b/test/Twig/Tests/CompilerTest.php
index 75563ef8d..ba230795d 100644
--- a/test/Twig/Tests/CompilerTest.php
+++ b/test/Twig/Tests/CompilerTest.php
@@ -11,11 +11,12 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Compiler;
 use Twig\Environment;
 use Twig\Loader\LoaderInterface;
 
-class CompilerTest extends \PHPUnit\Framework\TestCase
+class CompilerTest extends TestCase
 {
     public function testReprNumericValueWithLocale()
     {
diff --git a/test/Twig/Tests/ContainerRuntimeLoaderTest.php b/test/Twig/Tests/ContainerRuntimeLoaderTest.php
index a2f26489e..180211cb6 100644
--- a/test/Twig/Tests/ContainerRuntimeLoaderTest.php
+++ b/test/Twig/Tests/ContainerRuntimeLoaderTest.php
@@ -11,10 +11,11 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Psr\Container\ContainerInterface;
 use Twig\RuntimeLoader\ContainerRuntimeLoader;
 
-class ContainerRuntimeLoaderTest extends \PHPUnit\Framework\TestCase
+class ContainerRuntimeLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/test/Twig/Tests/CustomExtensionTest.php b/test/Twig/Tests/CustomExtensionTest.php
index 8a04bfc3e..b43e490eb 100644
--- a/test/Twig/Tests/CustomExtensionTest.php
+++ b/test/Twig/Tests/CustomExtensionTest.php
@@ -11,11 +11,12 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Extension\ExtensionInterface;
 use Twig\Loader\LoaderInterface;
 
-class CustomExtensionTest extends \PHPUnit\Framework\TestCase
+class CustomExtensionTest extends TestCase
 {
     /**
      * @dataProvider provideInvalidExtensions
diff --git a/test/Twig/Tests/EnvironmentTest.php b/test/Twig/Tests/EnvironmentTest.php
index 305e50d61..6935b8d1c 100644
--- a/test/Twig/Tests/EnvironmentTest.php
+++ b/test/Twig/Tests/EnvironmentTest.php
@@ -11,6 +11,7 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Cache\CacheInterface;
 use Twig\Cache\FilesystemCache;
 use Twig\Environment;
@@ -30,7 +31,7 @@ use Twig\TwigFilter;
 use Twig\TwigFunction;
 use Twig\TwigTest;
 
-class EnvironmentTest extends \PHPUnit\Framework\TestCase
+class EnvironmentTest extends TestCase
 {
     public function testAutoescapeOption()
     {
diff --git a/test/Twig/Tests/ErrorTest.php b/test/Twig/Tests/ErrorTest.php
index 723ee331b..b6d0511d0 100644
--- a/test/Twig/Tests/ErrorTest.php
+++ b/test/Twig/Tests/ErrorTest.php
@@ -11,6 +11,7 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Error\Error;
 use Twig\Error\RuntimeError;
@@ -18,7 +19,7 @@ use Twig\Loader\ArrayLoader;
 use Twig\Loader\FilesystemLoader;
 use Twig\Source;
 
-class ErrorTest extends \PHPUnit\Framework\TestCase
+class ErrorTest extends TestCase
 {
     public function testErrorWithObjectFilename()
     {
diff --git a/test/Twig/Tests/ExpressionParserTest.php b/test/Twig/Tests/ExpressionParserTest.php
index 8974d3e5f..c38025603 100644
--- a/test/Twig/Tests/ExpressionParserTest.php
+++ b/test/Twig/Tests/ExpressionParserTest.php
@@ -11,6 +11,7 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Loader\LoaderInterface;
 use Twig\Node\Expression\ArrayExpression;
@@ -20,7 +21,7 @@ use Twig\Node\Expression\NameExpression;
 use Twig\Parser;
 use Twig\Source;
 
-class ExpressionParserTest extends \PHPUnit\Framework\TestCase
+class ExpressionParserTest extends TestCase
 {
     /**
      * @expectedException \Twig\Error\SyntaxError
diff --git a/test/Twig/Tests/Extension/CoreTest.php b/test/Twig/Tests/Extension/CoreTest.php
index b67a7ab68..d3d517ff8 100644
--- a/test/Twig/Tests/Extension/CoreTest.php
+++ b/test/Twig/Tests/Extension/CoreTest.php
@@ -11,10 +11,11 @@ namespace Twig\Tests\Extension;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Loader\LoaderInterface;
 
-class CoreTest extends \PHPUnit\Framework\TestCase
+class CoreTest extends TestCase
 {
     /**
      * @dataProvider getRandomFunctionTestData
diff --git a/test/Twig/Tests/Extension/EscaperTest.php b/test/Twig/Tests/Extension/EscaperTest.php
index 178466a23..f94ca4582 100644
--- a/test/Twig/Tests/Extension/EscaperTest.php
+++ b/test/Twig/Tests/Extension/EscaperTest.php
@@ -11,11 +11,12 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Extension\EscaperExtension;
 use Twig\Loader\LoaderInterface;
 
-class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
+class Twig_Tests_Extension_EscaperTest extends TestCase
 {
     /**
      * All character encodings supported by htmlspecialchars().
@@ -158,7 +159,7 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
 
     public function testHtmlEscapingConvertsSpecialChars()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         foreach ($this->htmlSpecialChars as $key => $value) {
             $this->assertEquals($value, twig_escape_filter($twig, $key, 'html'), 'Failed to escape: '.$key);
         }
@@ -166,7 +167,7 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
 
     public function testHtmlAttributeEscapingConvertsSpecialChars()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         foreach ($this->htmlAttrSpecialChars as $key => $value) {
             $this->assertEquals($value, twig_escape_filter($twig, $key, 'html_attr'), 'Failed to escape: '.$key);
         }
@@ -174,7 +175,7 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
 
     public function testJavascriptEscapingConvertsSpecialChars()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         foreach ($this->jsSpecialChars as $key => $value) {
             $this->assertEquals($value, twig_escape_filter($twig, $key, 'js'), 'Failed to escape: '.$key);
         }
@@ -182,19 +183,19 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
 
     public function testJavascriptEscapingReturnsStringIfZeroLength()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         $this->assertEquals('', twig_escape_filter($twig, '', 'js'));
     }
 
     public function testJavascriptEscapingReturnsStringIfContainsOnlyDigits()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         $this->assertEquals('123', twig_escape_filter($twig, '123', 'js'));
     }
 
     public function testCssEscapingConvertsSpecialChars()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         foreach ($this->cssSpecialChars as $key => $value) {
             $this->assertEquals($value, twig_escape_filter($twig, $key, 'css'), 'Failed to escape: '.$key);
         }
@@ -202,19 +203,19 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
 
     public function testCssEscapingReturnsStringIfZeroLength()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         $this->assertEquals('', twig_escape_filter($twig, '', 'css'));
     }
 
     public function testCssEscapingReturnsStringIfContainsOnlyDigits()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         $this->assertEquals('123', twig_escape_filter($twig, '123', 'css'));
     }
 
     public function testUrlEscapingConvertsSpecialChars()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         foreach ($this->urlSpecialChars as $key => $value) {
             $this->assertEquals($value, twig_escape_filter($twig, $key, 'url'), 'Failed to escape: '.$key);
         }
@@ -271,7 +272,7 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
 
     public function testJavascriptEscapingEscapesOwaspRecommendedRanges()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         $immune = [',', '.', '_']; // Exceptions to escaping ranges
         for ($chr = 0; $chr < 0xFF; ++$chr) {
             if ($chr >= 0x30 && $chr <= 0x39
@@ -295,7 +296,7 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
 
     public function testHtmlAttributeEscapingEscapesOwaspRecommendedRanges()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         $immune = [',', '.', '-', '_']; // Exceptions to escaping ranges
         for ($chr = 0; $chr < 0xFF; ++$chr) {
             if ($chr >= 0x30 && $chr <= 0x39
@@ -319,7 +320,7 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
 
     public function testCssEscapingEscapesOwaspRecommendedRanges()
     {
-        $twig = new \Twig\Environment($this->getMockBuilder(\Twig\Loader\LoaderInterface::class)->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         // CSS has no exceptions to escaping ranges
         for ($chr = 0; $chr < 0xFF; ++$chr) {
             if ($chr >= 0x30 && $chr <= 0x39
@@ -371,7 +372,7 @@ class Twig_Tests_Extension_EscaperTest extends \PHPUnit\Framework\TestCase
     public function testObjectEscaping(string $escapedHtml, string $escapedJs, array $safeClasses)
     {
         $obj = new Extension_TestClass();
-        $twig = new Environment($this->getMockBuilder('\Twig\Loader\LoaderInterface')->getMock());
+        $twig = new Environment($this->getMockBuilder(LoaderInterface::class)->getMock());
         $twig->getExtension('\Twig\Extension\EscaperExtension')->setSafeClasses($safeClasses);
         $this->assertSame($escapedHtml, twig_escape_filter($twig, $obj, 'html', null, true));
         $this->assertSame($escapedJs, twig_escape_filter($twig, $obj, 'js', null, true));
diff --git a/test/Twig/Tests/Extension/SandboxTest.php b/test/Twig/Tests/Extension/SandboxTest.php
index 83c6b294b..8385f546c 100644
--- a/test/Twig/Tests/Extension/SandboxTest.php
+++ b/test/Twig/Tests/Extension/SandboxTest.php
@@ -11,6 +11,7 @@ namespace Twig\Tests\Extension;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Extension\SandboxExtension;
 use Twig\Loader\ArrayLoader;
@@ -22,7 +23,7 @@ use Twig\Sandbox\SecurityNotAllowedPropertyError;
 use Twig\Sandbox\SecurityNotAllowedTagError;
 use Twig\Sandbox\SecurityPolicy;
 
-class SandboxTest extends \PHPUnit\Framework\TestCase
+class SandboxTest extends TestCase
 {
     protected static $params;
     protected static $templates;
diff --git a/test/Twig/Tests/FactoryRuntimeLoaderTest.php b/test/Twig/Tests/FactoryRuntimeLoaderTest.php
index 32e61d152..35c2d5baf 100644
--- a/test/Twig/Tests/FactoryRuntimeLoaderTest.php
+++ b/test/Twig/Tests/FactoryRuntimeLoaderTest.php
@@ -11,9 +11,10 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\RuntimeLoader\FactoryRuntimeLoader;
 
-class FactoryRuntimeLoaderTest extends \PHPUnit\Framework\TestCase
+class FactoryRuntimeLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/test/Twig/Tests/FileExtensionEscapingStrategyTest.php b/test/Twig/Tests/FileExtensionEscapingStrategyTest.php
index 26e141350..883aa882c 100644
--- a/test/Twig/Tests/FileExtensionEscapingStrategyTest.php
+++ b/test/Twig/Tests/FileExtensionEscapingStrategyTest.php
@@ -11,9 +11,10 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\FileExtensionEscapingStrategy;
 
-class FileExtensionEscapingStrategyTest extends \PHPUnit\Framework\TestCase
+class FileExtensionEscapingStrategyTest extends TestCase
 {
     /**
      * @dataProvider getGuessData
diff --git a/test/Twig/Tests/LexerTest.php b/test/Twig/Tests/LexerTest.php
index 04ed8c41c..15b03b5af 100644
--- a/test/Twig/Tests/LexerTest.php
+++ b/test/Twig/Tests/LexerTest.php
@@ -11,13 +11,14 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Lexer;
 use Twig\Loader\LoaderInterface;
 use Twig\Source;
 use Twig\Token;
 
-class LexerTest extends \PHPUnit\Framework\TestCase
+class LexerTest extends TestCase
 {
     public function testNameLabelForTag()
     {
@@ -347,7 +348,7 @@ bar
     public function testOverridingSyntax()
     {
         $template = '[# comment #]{# variable #}/# if true #/true/# endif #/';
-        $lexer = new Lexer(new Environment($this->getMockBuilder('\Twig\Loader\LoaderInterface')->getMock()), [
+        $lexer = new Lexer(new Environment($this->getMockBuilder(LoaderInterface::class)->getMock()), [
             'tag_comment' => ['[#', '#]'],
             'tag_block' => ['/#', '#/'],
             'tag_variable' => ['{#', '#}'],
diff --git a/test/Twig/Tests/Loader/ArrayTest.php b/test/Twig/Tests/Loader/ArrayTest.php
index c3a7eacf1..cf8194724 100644
--- a/test/Twig/Tests/Loader/ArrayTest.php
+++ b/test/Twig/Tests/Loader/ArrayTest.php
@@ -11,9 +11,10 @@ namespace Twig\Tests\Loader;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Loader\ArrayLoader;
 
-class ArrayTest extends \PHPUnit\Framework\TestCase
+class ArrayTest extends TestCase
 {
     /**
      * @expectedException \Twig\Error\LoaderError
diff --git a/test/Twig/Tests/Loader/ChainTest.php b/test/Twig/Tests/Loader/ChainTest.php
index 86b95df3d..075677e6e 100644
--- a/test/Twig/Tests/Loader/ChainTest.php
+++ b/test/Twig/Tests/Loader/ChainTest.php
@@ -11,12 +11,13 @@ namespace Twig\Tests\Loader;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Loader\ArrayLoader;
 use Twig\Loader\ChainLoader;
 use Twig\Loader\FilesystemLoader;
 use Twig\Loader\LoaderInterface;
 
-class ChainTest extends \PHPUnit\Framework\TestCase
+class ChainTest extends TestCase
 {
     public function testGetSourceContext()
     {
diff --git a/test/Twig/Tests/Loader/FilesystemTest.php b/test/Twig/Tests/Loader/FilesystemTest.php
index 266418a5a..72815b815 100644
--- a/test/Twig/Tests/Loader/FilesystemTest.php
+++ b/test/Twig/Tests/Loader/FilesystemTest.php
@@ -11,11 +11,12 @@ namespace Twig\Tests\Loader;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Error\LoaderError;
 use Twig\Loader\FilesystemLoader;
 
-class FilesystemTest extends \PHPUnit\Framework\TestCase
+class FilesystemTest extends TestCase
 {
     public function testGetSourceContext()
     {
diff --git a/test/Twig/Tests/Node/Expression/CallTest.php b/test/Twig/Tests/Node/Expression/CallTest.php
index 5c15815c7..40278cbd3 100644
--- a/test/Twig/Tests/Node/Expression/CallTest.php
+++ b/test/Twig/Tests/Node/Expression/CallTest.php
@@ -11,9 +11,10 @@ namespace Twig\Tests\Node\Expression;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Node\Expression\CallExpression;
 
-class CallTest extends \PHPUnit\Framework\TestCase
+class CallTest extends TestCase
 {
     public function testGetArguments()
     {
diff --git a/test/Twig/Tests/NodeVisitor/OptimizerTest.php b/test/Twig/Tests/NodeVisitor/OptimizerTest.php
index 8d1a1fca7..0375f8863 100644
--- a/test/Twig/Tests/NodeVisitor/OptimizerTest.php
+++ b/test/Twig/Tests/NodeVisitor/OptimizerTest.php
@@ -11,6 +11,7 @@ namespace Twig\Tests\NodeVisitor;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Loader\LoaderInterface;
 use Twig\Node\Expression\BlockReferenceExpression;
@@ -19,7 +20,7 @@ use Twig\Node\ForNode;
 use Twig\Node\Node;
 use Twig\Source;
 
-class OptimizerTest extends \PHPUnit\Framework\TestCase
+class OptimizerTest extends TestCase
 {
     public function testRenderBlockOptimizer()
     {
diff --git a/test/Twig/Tests/ParserTest.php b/test/Twig/Tests/ParserTest.php
index 25dc9fcfa..8920f9fca 100644
--- a/test/Twig/Tests/ParserTest.php
+++ b/test/Twig/Tests/ParserTest.php
@@ -11,6 +11,7 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Loader\LoaderInterface;
 use Twig\Node\Node;
@@ -22,7 +23,7 @@ use Twig\Token;
 use Twig\TokenParser\AbstractTokenParser;
 use Twig\TokenStream;
 
-class ParserTest extends \PHPUnit\Framework\TestCase
+class ParserTest extends TestCase
 {
     /**
      * @expectedException        \Twig\Error\SyntaxError
diff --git a/test/Twig/Tests/Profiler/Dumper/AbstractTest.php b/test/Twig/Tests/Profiler/Dumper/AbstractTest.php
index a55bfa0d3..3a11433cd 100644
--- a/test/Twig/Tests/Profiler/Dumper/AbstractTest.php
+++ b/test/Twig/Tests/Profiler/Dumper/AbstractTest.php
@@ -13,7 +13,9 @@ namespace Twig\Tests\Profiler\Dumper;
 
 use Twig\Profiler\Profile;
 
-abstract class AbstractTest extends \PHPUnit\Framework\TestCase
+use PHPUnit\Framework\TestCase;
+
+abstract class AbstractTest extends TestCase
 {
     protected function getProfile()
     {
diff --git a/test/Twig/Tests/Profiler/ProfileTest.php b/test/Twig/Tests/Profiler/ProfileTest.php
index 0b7fd272f..a1f553cb7 100644
--- a/test/Twig/Tests/Profiler/ProfileTest.php
+++ b/test/Twig/Tests/Profiler/ProfileTest.php
@@ -11,9 +11,10 @@ namespace Twig\Tests\Profiler;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Profiler\Profile;
 
-class ProfileTest extends \PHPUnit\Framework\TestCase
+class ProfileTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/test/Twig/Tests/TemplateTest.php b/test/Twig/Tests/TemplateTest.php
index 043ab5ce4..a3e57f120 100644
--- a/test/Twig/Tests/TemplateTest.php
+++ b/test/Twig/Tests/TemplateTest.php
@@ -11,6 +11,7 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Error\RuntimeError;
 use Twig\Extension\SandboxExtension;
@@ -20,7 +21,7 @@ use Twig\Sandbox\SecurityError;
 use Twig\Sandbox\SecurityPolicy;
 use Twig\Template;
 
-class TemplateTest extends \PHPUnit\Framework\TestCase
+class TemplateTest extends TestCase
 {
     /**
      * @expectedException \LogicException
diff --git a/test/Twig/Tests/TemplateWrapperTest.php b/test/Twig/Tests/TemplateWrapperTest.php
index b4a0958b5..c524ebe3a 100644
--- a/test/Twig/Tests/TemplateWrapperTest.php
+++ b/test/Twig/Tests/TemplateWrapperTest.php
@@ -11,10 +11,11 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Loader\ArrayLoader;
 
-class TemplateWrapperTest extends \PHPUnit\Framework\TestCase
+class TemplateWrapperTest extends TestCase
 {
     public function testHasGetBlocks()
     {
diff --git a/test/Twig/Tests/TokenStreamTest.php b/test/Twig/Tests/TokenStreamTest.php
index 0e2ba93cb..a6440d6ca 100644
--- a/test/Twig/Tests/TokenStreamTest.php
+++ b/test/Twig/Tests/TokenStreamTest.php
@@ -11,10 +11,11 @@ namespace Twig\Tests;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Token;
 use Twig\TokenStream;
 
-class TokenStreamTest extends \PHPUnit\Framework\TestCase
+class TokenStreamTest extends TestCase
 {
     protected static $tokens;
 
diff --git a/test/Twig/Tests/Util/DeprecationCollectorTest.php b/test/Twig/Tests/Util/DeprecationCollectorTest.php
index 884a34fe4..16aa1e89e 100644
--- a/test/Twig/Tests/Util/DeprecationCollectorTest.php
+++ b/test/Twig/Tests/Util/DeprecationCollectorTest.php
@@ -11,12 +11,13 @@ namespace Twig\Tests\Util;
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Twig\Environment;
 use Twig\Loader\LoaderInterface;
 use Twig\TwigFunction;
 use Twig\Util\DeprecationCollector;
 
-class DeprecationCollectorTest extends \PHPUnit\Framework\TestCase
+class DeprecationCollectorTest extends TestCase
 {
     /**
      * @requires PHP 5.3