diff --git a/src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php b/src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php
index 622aaf8c92..b71f5454d3 100644
--- a/src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\BrowserKit\Tests;
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\BrowserKit\CookieJar;
+use Symfony\Component\BrowserKit\Exception\BadMethodCallException;
 use Symfony\Component\BrowserKit\History;
 use Symfony\Component\BrowserKit\Request;
 use Symfony\Component\BrowserKit\Response;
@@ -46,7 +47,7 @@ class AbstractBrowserTest extends TestCase
 
     public function testGetRequestNull()
     {
-        $this->expectException(\Symfony\Component\BrowserKit\Exception\BadMethodCallException::class);
+        $this->expectException(BadMethodCallException::class);
         $this->expectExceptionMessage('The "request()" method must be called before "Symfony\\Component\\BrowserKit\\AbstractBrowser::getRequest()".');
 
         $client = $this->getBrowser();
@@ -83,7 +84,7 @@ class AbstractBrowserTest extends TestCase
 
     public function testGetResponseNull()
     {
-        $this->expectException(\Symfony\Component\BrowserKit\Exception\BadMethodCallException::class);
+        $this->expectException(BadMethodCallException::class);
         $this->expectExceptionMessage('The "request()" method must be called before "Symfony\\Component\\BrowserKit\\AbstractBrowser::getResponse()".');
 
         $client = $this->getBrowser();
@@ -92,7 +93,7 @@ class AbstractBrowserTest extends TestCase
 
     public function testGetInternalResponseNull()
     {
-        $this->expectException(\Symfony\Component\BrowserKit\Exception\BadMethodCallException::class);
+        $this->expectException(BadMethodCallException::class);
         $this->expectExceptionMessage('The "request()" method must be called before "Symfony\\Component\\BrowserKit\\AbstractBrowser::getInternalResponse()".');
 
         $client = $this->getBrowser();
@@ -119,7 +120,7 @@ class AbstractBrowserTest extends TestCase
 
     public function testGetCrawlerNull()
     {
-        $this->expectException(\Symfony\Component\BrowserKit\Exception\BadMethodCallException::class);
+        $this->expectException(BadMethodCallException::class);
         $this->expectExceptionMessage('The "request()" method must be called before "Symfony\\Component\\BrowserKit\\AbstractBrowser::getCrawler()".');
 
         $client = $this->getBrowser();
@@ -832,7 +833,7 @@ class AbstractBrowserTest extends TestCase
 
     public function testInternalRequestNull()
     {
-        $this->expectException(\Symfony\Component\BrowserKit\Exception\BadMethodCallException::class);
+        $this->expectException(BadMethodCallException::class);
         $this->expectExceptionMessage('The "request()" method must be called before "Symfony\\Component\\BrowserKit\\AbstractBrowser::getInternalRequest()".');
 
         $client = $this->getBrowser();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
index 6a485d8bb4..9d94628f33 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
@@ -20,6 +20,7 @@ use Symfony\Component\DependencyInjection\Compiler\MergeExtensionConfigurationPa
 use Symfony\Component\DependencyInjection\Compiler\RegisterEnvVarProcessorsPass;
 use Symfony\Component\DependencyInjection\Compiler\ValidateEnvPlaceholdersPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 use Symfony\Component\DependencyInjection\Extension\Extension;
 
 class ValidateEnvPlaceholdersPassTest extends TestCase
@@ -59,7 +60,7 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
 
     public function testDefaultEnvWithoutPrefixIsValidatedInConfig()
     {
-        $this->expectException(\Symfony\Component\DependencyInjection\Exception\RuntimeException::class);
+        $this->expectException(RuntimeException::class);
         $this->expectExceptionMessage('The default value of an env() parameter must be a string or null, but "float" given to "env(FLOATISH)".');
 
         $container = new ContainerBuilder();
@@ -219,7 +220,7 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
 
     public function testEmptyEnvWhichCannotBeEmptyForScalarNodeWithValidation()
     {
-        $this->expectException(\Symfony\Component\Config\Definition\Exception\InvalidConfigurationException::class);
+        $this->expectException(InvalidConfigurationException::class);
         $this->expectExceptionMessage('The path "env_extension.scalar_node_not_empty_validated" cannot contain an environment variable when empty values are not allowed by definition and are validated.');
 
         $container = new ContainerBuilder();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php b/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
index e19d838b60..37fa0ad9d9 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
@@ -14,6 +14,7 @@ namespace Symfony\Component\DependencyInjection\Tests\Extension;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
 use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Extension\InvalidConfig\InvalidConfigExtension;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Extension\SemiValidConfig\SemiValidConfigExtension;
@@ -71,7 +72,7 @@ class ExtensionTest extends TestCase
 
     public function testInvalidConfiguration()
     {
-        $this->expectException(\Symfony\Component\DependencyInjection\Exception\LogicException::class);
+        $this->expectException(LogicException::class);
         $this->expectExceptionMessage('The extension configuration class "Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\Extension\\InvalidConfig\\Configuration" must implement "Symfony\\Component\\Config\\Definition\\ConfigurationInterface".');
 
         $extension = new InvalidConfigExtension();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
index 88c7830493..9134f1f6c0 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
@@ -113,7 +113,7 @@ class EnvPlaceholderParameterBagTest extends TestCase
 
     public function testResolveEnvRequiresStrings()
     {
-        $this->expectException(\Symfony\Component\DependencyInjection\Exception\RuntimeException::class);
+        $this->expectException(RuntimeException::class);
         $this->expectExceptionMessage('The default value of env parameter "INT_VAR" must be a string or null, "int" given.');
 
         $bag = new EnvPlaceholderParameterBag();
@@ -124,7 +124,7 @@ class EnvPlaceholderParameterBagTest extends TestCase
 
     public function testGetDefaultScalarEnv()
     {
-        $this->expectException(\Symfony\Component\DependencyInjection\Exception\RuntimeException::class);
+        $this->expectException(RuntimeException::class);
         $this->expectExceptionMessage('The default value of an env() parameter must be a string or null, but "int" given to "env(INT_VAR)".');
 
         $bag = new EnvPlaceholderParameterBag();
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
index 416815c887..b98d32f04b 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
@@ -350,7 +350,7 @@ class FormTypeTest extends BaseTypeTest
 
     public function testActionCannotBeNull()
     {
-        $this->expectException(\Symfony\Component\OptionsResolver\Exception\InvalidOptionsException::class);
+        $this->expectException(InvalidOptionsException::class);
         $this->factory->create(static::TESTED_TYPE, null, ['action' => null]);
     }
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/NumberTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/NumberTypeTest.php
index f66afb6b60..4aa86db62b 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/NumberTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/NumberTypeTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Form\Tests\Extension\Core\Type;
 
 use Symfony\Component\Form\Exception\LogicException;
+use Symfony\Component\Form\Exception\TransformationFailedException;
 use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class NumberTypeTest extends BaseTypeTest
@@ -80,7 +81,7 @@ class NumberTypeTest extends BaseTypeTest
 
     public function testStringInputWithFloatData()
     {
-        $this->expectException(\Symfony\Component\Form\Exception\TransformationFailedException::class);
+        $this->expectException(TransformationFailedException::class);
         $this->expectExceptionMessage('Expected a numeric string.');
 
         $this->factory->create(static::TESTED_TYPE, 12345.6789, [
@@ -91,7 +92,7 @@ class NumberTypeTest extends BaseTypeTest
 
     public function testStringInputWithIntData()
     {
-        $this->expectException(\Symfony\Component\Form\Exception\TransformationFailedException::class);
+        $this->expectException(TransformationFailedException::class);
         $this->expectExceptionMessage('Expected a numeric string.');
 
         $this->factory->create(static::TESTED_TYPE, 12345, [
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimeTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimeTypeTest.php
index 80a79c3a21..3c61306564 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimeTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimeTypeTest.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\Form\Tests\Extension\Core\Type;
 
 use Symfony\Component\Form\ChoiceList\View\ChoiceView;
 use Symfony\Component\Form\Exception\InvalidConfigurationException;
+use Symfony\Component\Form\Exception\LogicException;
 use Symfony\Component\Form\FormError;
 use Symfony\Component\Form\FormInterface;
 use Symfony\Component\OptionsResolver\Exception\InvalidOptionsException;
@@ -478,7 +479,7 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSetDataDifferentTimezonesWithoutReferenceDate()
     {
-        $this->expectException(\Symfony\Component\Form\Exception\LogicException::class);
+        $this->expectException(LogicException::class);
         $this->expectExceptionMessage('Using different values for the "model_timezone" and "view_timezone" options without configuring a reference date is not supported.');
 
         $form = $this->factory->create(static::TESTED_TYPE, null, [
diff --git a/src/Symfony/Component/Form/Tests/FormRendererTest.php b/src/Symfony/Component/Form/Tests/FormRendererTest.php
index 373a2e7f7d..50a35eddab 100644
--- a/src/Symfony/Component/Form/Tests/FormRendererTest.php
+++ b/src/Symfony/Component/Form/Tests/FormRendererTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Form\Tests;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Form\Exception\BadMethodCallException;
 use Symfony\Component\Form\FormRenderer;
 use Symfony\Component\Form\FormRendererEngineInterface;
 use Symfony\Component\Form\FormView;
@@ -32,7 +33,7 @@ class FormRendererTest extends TestCase
 
     public function testRenderARenderedField()
     {
-        $this->expectException(\Symfony\Component\Form\Exception\BadMethodCallException::class);
+        $this->expectException(BadMethodCallException::class);
         $this->expectExceptionMessage('Field "foo" has already been rendered, save the result of previous render call to a variable and output that instead.');
 
         $formView = new FormView();
diff --git a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
index 44ede17251..205f3fa1e8 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
@@ -2404,7 +2404,7 @@ class OptionsResolverTest extends TestCase
 
     public function testFailsIfOptionIsAlreadyDefined()
     {
-        $this->expectException(\Symfony\Component\OptionsResolver\Exception\OptionDefinitionException::class);
+        $this->expectException(OptionDefinitionException::class);
         $this->expectExceptionMessage('The option "foo" is already defined.');
         $this->resolver->define('foo');
         $this->resolver->define('foo');
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
index f9efe296ed..a0d6041327 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\Security\Core\Tests\Authentication\Provider;
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Provider\PreAuthenticatedAuthenticationProvider;
+use Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\Exception\BadCredentialsException;
@@ -30,7 +31,7 @@ class PreAuthenticatedAuthenticationProviderTest extends TestCase
         $this->assertTrue($provider->supports($this->getSupportedToken()));
         $this->assertFalse($provider->supports($this->createMock(TokenInterface::class)));
 
-        $token = $this->createMock(\Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken::class);
+        $token = $this->createMock(PreAuthenticatedToken::class);
         $token
             ->expects($this->once())
             ->method('getFirewallName')
@@ -66,7 +67,7 @@ class PreAuthenticatedAuthenticationProviderTest extends TestCase
         $provider = $this->getProvider($user);
 
         $token = $provider->authenticate($this->getSupportedToken('fabien', 'pass'));
-        $this->assertInstanceOf(\Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken::class, $token);
+        $this->assertInstanceOf(PreAuthenticatedToken::class, $token);
         $this->assertEquals('pass', $token->getCredentials());
         $this->assertEquals('key', $token->getFirewallName());
         $this->assertEquals([], $token->getRoleNames());
@@ -92,7 +93,7 @@ class PreAuthenticatedAuthenticationProviderTest extends TestCase
 
     protected function getSupportedToken($user = false, $credentials = false)
     {
-        $token = $this->getMockBuilder(\Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken::class)->setMethods(['getUser', 'getCredentials', 'getFirewallName'])->disableOriginalConstructor()->getMock();
+        $token = $this->getMockBuilder(PreAuthenticatedToken::class)->setMethods(['getUser', 'getCredentials', 'getFirewallName'])->disableOriginalConstructor()->getMock();
         if (false !== $user) {
             $token->expects($this->once())
                   ->method('getUser')
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/AtLeastOneOfTest.php b/src/Symfony/Component/Validator/Tests/Constraints/AtLeastOneOfTest.php
index 3ceaacdcf3..66b8168dfb 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/AtLeastOneOfTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/AtLeastOneOfTest.php
@@ -14,6 +14,7 @@ namespace Symfony\Component\Validator\Tests\Constraints;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\AtLeastOneOf;
 use Symfony\Component\Validator\Constraints\Valid;
+use Symfony\Component\Validator\Exception\ConstraintDefinitionException;
 
 /**
  * @author Przemysław Bogusz <przemyslaw.bogusz@tubotax.pl>
@@ -22,7 +23,7 @@ class AtLeastOneOfTest extends TestCase
 {
     public function testRejectNonConstraints()
     {
-        $this->expectException(\Symfony\Component\Validator\Exception\ConstraintDefinitionException::class);
+        $this->expectException(ConstraintDefinitionException::class);
         new AtLeastOneOf([
             'foo',
         ]);
@@ -30,7 +31,7 @@ class AtLeastOneOfTest extends TestCase
 
     public function testRejectValidConstraint()
     {
-        $this->expectException(\Symfony\Component\Validator\Exception\ConstraintDefinitionException::class);
+        $this->expectException(ConstraintDefinitionException::class);
         new AtLeastOneOf([
             new Valid(),
         ]);
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/HostnameValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/HostnameValidatorTest.php
index 4764176795..16c3121705 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/HostnameValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/HostnameValidatorTest.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\Validator\Tests\Constraints;
 
 use Symfony\Component\Validator\Constraints\Hostname;
 use Symfony\Component\Validator\Constraints\HostnameValidator;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
 use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
 
 /**
@@ -36,7 +37,7 @@ class HostnameValidatorTest extends ConstraintValidatorTestCase
 
     public function testExpectsStringCompatibleType()
     {
-        $this->expectException(\Symfony\Component\Validator\Exception\UnexpectedValueException::class);
+        $this->expectException(UnexpectedValueException::class);
 
         $this->validator->validate(new \stdClass(), new Hostname());
     }