diff --git a/rules/coding-style/src/Rector/Throw_/AnnotateThrowablesRector.php b/rules/coding-style/src/Rector/Throw_/AnnotateThrowablesRector.php
index 7ba8eb3b5464..173f1c665c9b 100644
--- a/rules/coding-style/src/Rector/Throw_/AnnotateThrowablesRector.php
+++ b/rules/coding-style/src/Rector/Throw_/AnnotateThrowablesRector.php
@@ -24,7 +24,7 @@
 use Rector\Core\RectorDefinition\CodeSample;
 use Rector\Core\RectorDefinition\RectorDefinition;
 use Rector\Core\Reflection\ClassMethodReflectionHelper;
-use Rector\Core\Reflection\FunctionReflectionHelper;
+use Rector\Core\Reflection\FunctionAnnotationResolver;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 use ReflectionFunction;
 
@@ -39,9 +39,9 @@ final class AnnotateThrowablesRector extends AbstractRector
     private $throwablesToAnnotate = [];
 
     /**
-     * @var FunctionReflectionHelper
+     * @var FunctionAnnotationResolver
      */
-    private $functionReflectionHelper;
+    private $functionAnnotationResolver;
 
     /**
      * @var ClassMethodReflectionHelper
@@ -56,9 +56,9 @@ final class AnnotateThrowablesRector extends AbstractRector
     public function __construct(
         ClassMethodReflectionHelper $classMethodReflectionHelper,
         ClassResolver $classResolver,
-        FunctionReflectionHelper $functionReflectionHelper
+        FunctionAnnotationResolver $functionAnnotationResolver
     ) {
-        $this->functionReflectionHelper = $functionReflectionHelper;
+        $this->functionAnnotationResolver = $functionAnnotationResolver;
         $this->classMethodReflectionHelper = $classMethodReflectionHelper;
         $this->classResolver = $classResolver;
     }
@@ -197,7 +197,7 @@ private function analyzeStmtFuncCall(FuncCall $funcCall): int
         }
 
         $reflectedFunction = new ReflectionFunction($functionFqn);
-        $foundThrownThrowables = $this->functionReflectionHelper->extractFunctionAnnotatedThrows($reflectedFunction);
+        $foundThrownThrowables = $this->functionAnnotationResolver->extractFunctionAnnotatedThrows($reflectedFunction);
         $alreadyAnnotatedThrowables = $this->extractAlreadyAnnotatedThrowables($funcCall);
         return $this->diffThrowables($foundThrownThrowables, $alreadyAnnotatedThrowables);
     }
diff --git a/src/PhpDoc/PhpDocTagsFinder.php b/src/PhpDoc/PhpDocTagsFinder.php
index 2780f70845ab..1adda02c8009 100644
--- a/src/PhpDoc/PhpDocTagsFinder.php
+++ b/src/PhpDoc/PhpDocTagsFinder.php
@@ -6,6 +6,9 @@
 
 use Nette\Utils\Strings;
 
+/**
+ * @see \Rector\Core\Tests\PhpDoc\PhpDocTagsFinderTest
+ */
 final class PhpDocTagsFinder
 {
     /**
@@ -31,6 +34,7 @@ public function extractTagsFromStringedDocblock(string $dockblock, string $tagNa
             // This is required as @return, for example, can be written as "@return ClassOne|ClassTwo|ClassThree"
             return explode('|', str_replace($tagName . ' ', '', $matchingTag));
         };
+
         $matchingTags = array_map($explode, $matchingTags);
 
         return array_merge(...$matchingTags);
diff --git a/src/Reflection/FunctionReflectionHelper.php b/src/Reflection/FunctionAnnotationResolver.php
similarity index 98%
rename from src/Reflection/FunctionReflectionHelper.php
rename to src/Reflection/FunctionAnnotationResolver.php
index 57454436f367..d4103cd2e80f 100644
--- a/src/Reflection/FunctionReflectionHelper.php
+++ b/src/Reflection/FunctionAnnotationResolver.php
@@ -12,7 +12,7 @@
 use Rector\Core\PhpParser\Parser\FunctionParser;
 use ReflectionFunction;
 
-final class FunctionReflectionHelper
+final class FunctionAnnotationResolver
 {
     /**
      * @var ClassNaming
diff --git a/tests/PhpDoc/PhpDocTagsFinderTest.php b/tests/PhpDoc/PhpDocTagsFinderTest.php
new file mode 100644
index 000000000000..41e50627a28e
--- /dev/null
+++ b/tests/PhpDoc/PhpDocTagsFinderTest.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Core\Tests\PhpDoc;
+
+use Nette\Utils\FileSystem;
+use Rector\Core\HttpKernel\RectorKernel;
+use Rector\Core\PhpDoc\PhpDocTagsFinder;
+use Symplify\PackageBuilder\Tests\AbstractKernelTestCase;
+
+final class PhpDocTagsFinderTest extends AbstractKernelTestCase
+{
+    /**
+     * @var PhpDocTagsFinder
+     */
+    private $phpDocTagsFinder;
+
+    protected function setUp(): void
+    {
+        $this->bootKernel(RectorKernel::class);
+        $this->phpDocTagsFinder = self::$container->get(PhpDocTagsFinder::class);
+    }
+
+    public function test(): void
+    {
+        $docContent = FileSystem::read(__DIR__ . '/Source/doc_block_throws.txt');
+
+        $throwsTags = $this->phpDocTagsFinder->extractTagsFromStringedDocblock($docContent, 'throws');
+
+        $this->assertCount(3, $throwsTags);
+        $this->assertSame(['A', 'B', 'C'], $throwsTags);
+    }
+}
diff --git a/tests/PhpDoc/Source/doc_block_throws.txt b/tests/PhpDoc/Source/doc_block_throws.txt
new file mode 100644
index 000000000000..67996b1f03e3
--- /dev/null
+++ b/tests/PhpDoc/Source/doc_block_throws.txt
@@ -0,0 +1,3 @@
+/**
+ * @throws A|B|C
+ */
diff --git a/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/Fixture/fixture.php.inc b/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/Fixture/fixture.php.inc
index fdbb379b3430..66ee98b111c5 100644
--- a/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/Fixture/fixture.php.inc
+++ b/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/Fixture/fixture.php.inc
@@ -1,21 +1,31 @@
 <?php
 
-function unsetAndIsset()
+namespace Rector\Core\Tests\Rector\MagicDisclosure\UnsetAndIssetToMethodCallRector\Fixture;
+
+class SomeClass
 {
-    $container = new Nette\DI\Container;
-    isset($container['someService']);
-    unset($container['someService']);
+    function unsetAndIsset()
+    {
+        $container = new \Rector\Core\Tests\Rector\MagicDisclosure\UnsetAndIssetToMethodCallRector\Source\LocalContainer;
+        isset($container['someService']);
+        unset($container['someService']);
+    }
 }
 
 ?>
 -----
 <?php
 
-function unsetAndIsset()
+namespace Rector\Core\Tests\Rector\MagicDisclosure\UnsetAndIssetToMethodCallRector\Fixture;
+
+class SomeClass
 {
-    $container = new Nette\DI\Container;
-    $container->hasService('someService');
-    $container->removeService('someService');
+    function unsetAndIsset()
+    {
+        $container = new \Rector\Core\Tests\Rector\MagicDisclosure\UnsetAndIssetToMethodCallRector\Source\LocalContainer;
+        $container->hasService('someService');
+        $container->removeService('someService');
+    }
 }
 
 ?>
diff --git a/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/Source/LocalContainer.php b/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/Source/LocalContainer.php
new file mode 100644
index 000000000000..30b825ec3f23
--- /dev/null
+++ b/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/Source/LocalContainer.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+
+namespace Rector\Core\Tests\Rector\MagicDisclosure\UnsetAndIssetToMethodCallRector\Source;
+
+final class LocalContainer
+{
+
+}
diff --git a/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/UnsetAndIssetToMethodCallRectorTest.php b/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/UnsetAndIssetToMethodCallRectorTest.php
index f8d071c69a6e..0f0e3faaf4be 100644
--- a/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/UnsetAndIssetToMethodCallRectorTest.php
+++ b/tests/Rector/MagicDisclosure/UnsetAndIssetToMethodCallRector/UnsetAndIssetToMethodCallRectorTest.php
@@ -5,9 +5,9 @@
 namespace Rector\Core\Tests\Rector\MagicDisclosure\UnsetAndIssetToMethodCallRector;
 
 use Iterator;
-use Nette\DI\Container;
 use Rector\Core\Rector\MagicDisclosure\UnsetAndIssetToMethodCallRector;
 use Rector\Core\Testing\PHPUnit\AbstractRectorTestCase;
+use Rector\Core\Tests\Rector\MagicDisclosure\UnsetAndIssetToMethodCallRector\Source\LocalContainer;
 
 final class UnsetAndIssetToMethodCallRectorTest extends AbstractRectorTestCase
 {
@@ -32,7 +32,7 @@ protected function getRectorsWithConfiguration(): array
         return [
             UnsetAndIssetToMethodCallRector::class => [
                 '$typeToMethodCalls' => [
-                    Container::class => [
+                    LocalContainer::class => [
                         'isset' => 'hasService',
                         'unset' => 'removeService',
                     ],