diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index 27aa317..03c8954 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -10,13 +10,10 @@
 
     <!-- Set the minimum PHP version for PHPCompatibility.
          This should be kept in sync with the requirements in the composer.json file. -->
-    <config name="testVersion" value="7.2-"/>
+    <config name="testVersion" value="7.4-"/>
 
     <rule ref="phpDocumentor">
         <exclude name="SlevomatCodingStandard.Exceptions.ReferenceThrowableOnly.ReferencedGeneralException" />
-
-        <!-- Property type declarations are a PHP 7.4 feature. -->
-        <exclude name="SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingNativeTypeHint"/>
     </rule>
 
     <rule ref="SlevomatCodingStandard.Classes.SuperfluousAbstractClassNaming.SuperfluousPrefix">
diff --git a/src/DocBlock/StandardTagFactory.php b/src/DocBlock/StandardTagFactory.php
index b728d58..eb0c75b 100644
--- a/src/DocBlock/StandardTagFactory.php
+++ b/src/DocBlock/StandardTagFactory.php
@@ -41,6 +41,7 @@ use ReflectionNamedType;
 use ReflectionParameter;
 use Webmozart\Assert\Assert;
 
+use function array_key_exists;
 use function array_merge;
 use function array_slice;
 use function call_user_func_array;
@@ -48,6 +49,7 @@ use function count;
 use function get_class;
 use function is_object;
 use function preg_match;
+use function sprintf;
 use function strpos;
 use function trim;
 
@@ -164,6 +166,7 @@ final class StandardTagFactory implements TagFactory
         $this->serviceLocator[$alias ?: get_class($service)] = $service;
     }
 
+    /** {@inheritDoc} */
     public function registerTagHandler(string $tagName, $handler): void
     {
         Assert::stringNotEmpty($tagName);
@@ -176,6 +179,7 @@ final class StandardTagFactory implements TagFactory
         if (is_object($handler)) {
             Assert::implementsInterface($handler, TagFactory::class);
             $this->tagHandlerMappings[$tagName] = $handler;
+
             return;
         }
 
@@ -217,7 +221,9 @@ final class StandardTagFactory implements TagFactory
             $this->getServiceLocatorWithDynamicParameters($context, $name, $body)
         );
 
-        $arguments['tagLine'] = sprintf('@%s %s', $name, $body);
+        if (array_key_exists('tagLine', $arguments)) {
+            $arguments['tagLine'] = sprintf('@%s %s', $name, $body);
+        }
 
         try {
             $callable = [$handlerClassName, 'create'];
diff --git a/src/DocBlock/TagFactory.php b/src/DocBlock/TagFactory.php
index 9dec799..a6f1ae8 100644
--- a/src/DocBlock/TagFactory.php
+++ b/src/DocBlock/TagFactory.php
@@ -15,7 +15,6 @@ namespace phpDocumentor\Reflection\DocBlock;
 
 use InvalidArgumentException;
 use phpDocumentor\Reflection\DocBlock\Tags\Factory\Factory;
-use phpDocumentor\Reflection\Types\Context as TypeContext;
 
 interface TagFactory extends Factory
 {
@@ -61,7 +60,7 @@ interface TagFactory extends Factory
      *
      * @param string                    $tagName Name of tag to register a handler for. When registering a namespaced
      *                                   tag, the full name, along with a prefixing slash MUST be provided.
-     * @param class-string<Tag>         $handler FQCN of handler.
+     * @param class-string<Tag>|Factory $handler FQCN of handler.
      *
      * @throws InvalidArgumentException If the tag name is not a string.
      * @throws InvalidArgumentException If the tag name is namespaced (contains backslashes) but
@@ -70,5 +69,5 @@ interface TagFactory extends Factory
      * @throws InvalidArgumentException If the handler is not an existing class.
      * @throws InvalidArgumentException If the handler does not implement the {@see Tag} interface.
      */
-    public function registerTagHandler(string $tagName, string $handler): void;
+    public function registerTagHandler(string $tagName, $handler): void;
 }
diff --git a/src/DocBlock/Tags/Factory/AbstractPHPStanFactory.php b/src/DocBlock/Tags/Factory/AbstractPHPStanFactory.php
index 281cbbc..62d32f2 100644
--- a/src/DocBlock/Tags/Factory/AbstractPHPStanFactory.php
+++ b/src/DocBlock/Tags/Factory/AbstractPHPStanFactory.php
@@ -13,9 +13,7 @@ declare(strict_types=1);
 
 namespace phpDocumentor\Reflection\DocBlock\Tags\Factory;
 
-use phpDocumentor\Reflection\DocBlock\Tags\Factory\Factory;
 use phpDocumentor\Reflection\DocBlock\Tag;
-use phpDocumentor\Reflection\DocBlock\TagFactory;
 use phpDocumentor\Reflection\DocBlock\Tags\InvalidTag;
 use phpDocumentor\Reflection\Types\Context as TypeContext;
 use PHPStan\PhpDocParser\Lexer\Lexer;
@@ -36,6 +34,7 @@ class AbstractPHPStanFactory implements Factory
 {
     private PhpDocParser $parser;
     private Lexer $lexer;
+    /** @var PHPStanFactory[] */
     private array $factories;
 
     public function __construct(PHPStanFactory ...$factories)
diff --git a/src/DocBlock/Tags/Factory/Factory.php b/src/DocBlock/Tags/Factory/Factory.php
index a8c94b6..190d3ff 100644
--- a/src/DocBlock/Tags/Factory/Factory.php
+++ b/src/DocBlock/Tags/Factory/Factory.php
@@ -28,7 +28,6 @@ use phpDocumentor\Reflection\Types\Context as TypeContext;
 
 interface Factory
 {
-
     /**
      * Factory method responsible for instantiating the correct sub type.
      *
diff --git a/src/DocBlockFactory.php b/src/DocBlockFactory.php
index f75a02c..2599e54 100644
--- a/src/DocBlockFactory.php
+++ b/src/DocBlockFactory.php
@@ -16,11 +16,11 @@ namespace phpDocumentor\Reflection;
 use InvalidArgumentException;
 use LogicException;
 use phpDocumentor\Reflection\DocBlock\DescriptionFactory;
-use phpDocumentor\Reflection\DocBlock\Tags\Factory\Factory;
 use phpDocumentor\Reflection\DocBlock\StandardTagFactory;
 use phpDocumentor\Reflection\DocBlock\Tag;
 use phpDocumentor\Reflection\DocBlock\TagFactory;
 use phpDocumentor\Reflection\DocBlock\Tags\Factory\AbstractPHPStanFactory;
+use phpDocumentor\Reflection\DocBlock\Tags\Factory\Factory;
 use phpDocumentor\Reflection\DocBlock\Tags\Factory\ParamFactory;
 use phpDocumentor\Reflection\DocBlock\Tags\Factory\TypeFactory;
 use Webmozart\Assert\Assert;
@@ -42,7 +42,7 @@ final class DocBlockFactory implements DocBlockFactoryInterface
     /** @var DocBlock\DescriptionFactory */
     private $descriptionFactory;
 
-    /** @var \phpDocumentor\Reflection\DocBlock\Tags\Factory\Factory */
+    /** @var Factory */
     private $tagFactory;
 
     /**
diff --git a/tests/unit/DocBlock/StandardTagFactoryTest.php b/tests/unit/DocBlock/StandardTagFactoryTest.php
index 893c3b6..5a954d5 100644
--- a/tests/unit/DocBlock/StandardTagFactoryTest.php
+++ b/tests/unit/DocBlock/StandardTagFactoryTest.php
@@ -228,7 +228,7 @@ class StandardTagFactoryTest extends TestCase
 
     public function testTagWithHandlerObject(): void
     {
-        $fqsenResolver      = new FqsenResolver();
+        $fqsenResolver = new FqsenResolver();
 
         $customFactory = new CustomTagFactory();
         $injectedClass = new CustomServiceClass();