diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cb238000a..92320f28a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -28,7 +28,7 @@ jobs:
             -   name: "Set up PHP"
                 uses: shivammathur/setup-php@v2 # https://github.com/marketplace/actions/setup-php-action
                 with:
-                    php-version: "8.1"
+                    php-version: "8.2"
                     coverage: none
 
             -   name: "Checkout code"
@@ -41,20 +41,20 @@ jobs:
                 run: "composer static"
 
     tests:
-        name: "Test: ${{ matrix.os }} / deps-${{ matrix.dependencies }}"
-        runs-on: "${{ matrix.os }}"
+        name: "Test: ${{ matrix.os }} / ${{ matrix.php }} / ${{ matrix.dependencies }}"
+        runs-on: "${{ matrix.os }}-latest"
         strategy:
             fail-fast: false
             matrix:
-                os: [ ubuntu-latest, macos-latest, windows-latest ]
-                php: [ "8.1" ]
+                os: [ ubuntu, macos, windows ]
+                php: [ "8.1", "8.2" ]
                 dependencies: [ lowest, highest ]
         steps:
             -   name: "Install rsync"
                 uses: GuillaumeFalourd/setup-rsync@v1.2 # https://github.com/marketplace/actions/setup-rsync
 
             -   name: "Set up PHP w/ Coverage"
-                if: ${{ matrix.os == 'ubuntu-latest' && matrix.dependencies == 'highest' }}
+                if: ${{ matrix.os == 'ubuntu' && matrix.dependencies == 'highest' }}
                 uses: shivammathur/setup-php@v2 # https://github.com/marketplace/actions/setup-php-action
                 with:
                     php-version: "${{ matrix.php }}"
@@ -62,7 +62,7 @@ jobs:
                     ini-values: assert.active=1, assert.exception=1, zend.assertions=1
 
             -   name: "Set up PHP w/o Coverage"
-                if: ${{ !( matrix.os == 'ubuntu-latest' && matrix.dependencies == 'highest' ) }}
+                if: ${{ !( matrix.os == 'ubuntu' && matrix.dependencies == 'highest' ) }}
                 uses: shivammathur/setup-php@v2 # https://github.com/marketplace/actions/setup-php-action
                 with:
                     php-version: "${{ matrix.php }}"
@@ -85,12 +85,12 @@ jobs:
 
             -   name: "Run core tests with coverage"
                 run: "composer test"
-                if: ${{ matrix.os == 'ubuntu-latest' && matrix.dependencies == 'highest' }}
+                if: ${{ matrix.os == 'ubuntu' && matrix.dependencies == 'highest' }}
 
             # There's no reason to generate coverage data on multiple jobs--the result should be the same.
             -   name: "Run core tests without coverage"
                 run: "./vendor/bin/phpunit --no-coverage --exclude-group=windows_only"
-                if: ${{ runner.os != 'Windows' && !( matrix.os == 'ubuntu-latest' && matrix.dependencies == 'highest' ) }}
+                if: ${{ runner.os != 'Windows' && !( matrix.os == 'ubuntu' && matrix.dependencies == 'highest' ) }}
 
             -   name: "Run Windows tests"
                 run: "./vendor/bin/phpunit --no-coverage --exclude-group=no_windows"
@@ -98,12 +98,11 @@ jobs:
 
     performance:
         name: "Performance: ${{ matrix.os }}"
-        runs-on: "${{ matrix.os }}"
+        runs-on: "${{ matrix.os }}-latest"
         strategy:
             fail-fast: false
             matrix:
-                os: [ ubuntu-latest, windows-latest ]
-                php: [ "8.1" ]
+                os: [ ubuntu, windows ]
         steps:
             -   name: "Install rsync"
                 uses: GuillaumeFalourd/setup-rsync@v1.2 # https://github.com/marketplace/actions/setup-rsync
@@ -111,7 +110,7 @@ jobs:
             -   name: "Set up PHP"
                 uses: shivammathur/setup-php@v2 # https://github.com/marketplace/actions/setup-php-action
                 with:
-                    php-version: "8.1"
+                    php-version: "8.2"
                     coverage: none
 
             -   name: "Checkout code"
@@ -130,7 +129,7 @@ jobs:
             -   name: "Set up PHP"
                 uses: shivammathur/setup-php@v2 # https://github.com/marketplace/actions/setup-php-action
                 with:
-                    php-version: "8.1"
+                    php-version: "8.2"
                     extensions: gd
                     ini-values: assert.active=1, assert.exception=1, zend.assertions=1
 
diff --git a/.idea/runConfigurations/PHPCS.xml b/.idea/runConfigurations/PHPCS.xml
index 3dab64966..844942b7d 100644
--- a/.idea/runConfigurations/PHPCS.xml
+++ b/.idea/runConfigurations/PHPCS.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="PHPCS" type="ShConfigurationType" activateToolWindowBeforeRun="false">
-    <option name="SCRIPT_TEXT" value="composer phpcs" />
+    <option name="SCRIPT_TEXT" value="rm -f var/phpcs/cache.json; composer phpcs" />
     <option name="INDEPENDENT_SCRIPT_PATH" value="true" />
     <option name="SCRIPT_PATH" value="" />
     <option name="SCRIPT_OPTIONS" value="" />
diff --git a/composer.json b/composer.json
index 19f7ad8ac..d533f64e7 100644
--- a/composer.json
+++ b/composer.json
@@ -19,8 +19,8 @@
     "require": {
         "php": ">=8.1.0",
         "ext-json": "*",
-        "symfony/filesystem": "^6.2",
-        "symfony/process": "^6.2",
+        "symfony/filesystem": "^6.2 || ^7.0",
+        "symfony/process": "^6.2 || ^7.0",
         "symfony/translation-contracts": "^3.1"
     },
     "require-dev": {
diff --git a/composer.lock b/composer.lock
index f2afaebcf..8ec861636 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,24 +4,24 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "97698e2f77f2c8711e6320f031e12724",
+    "content-hash": "36b9b4adabf7332caef5a90206bb468d",
     "packages": [
         {
             "name": "symfony/filesystem",
-            "version": "v6.4.3",
+            "version": "v7.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "7f3b1755eb49297a0827a7575d5d2b2fd11cc9fb"
+                "reference": "2890e3a825bc0c0558526c04499c13f83e1b6b12"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/7f3b1755eb49297a0827a7575d5d2b2fd11cc9fb",
-                "reference": "7f3b1755eb49297a0827a7575d5d2b2fd11cc9fb",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/2890e3a825bc0c0558526c04499c13f83e1b6b12",
+                "reference": "2890e3a825bc0c0558526c04499c13f83e1b6b12",
                 "shasum": ""
             },
             "require": {
-                "php": ">=8.1",
+                "php": ">=8.2",
                 "symfony/polyfill-ctype": "~1.8",
                 "symfony/polyfill-mbstring": "~1.8"
             },
@@ -51,7 +51,7 @@
             "description": "Provides basic utilities for the filesystem",
             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/filesystem/tree/v6.4.3"
+                "source": "https://github.com/symfony/filesystem/tree/v7.0.3"
             },
             "funding": [
                 {
@@ -67,7 +67,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-01-23T14:51:35+00:00"
+            "time": "2024-01-23T15:02:46+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -230,20 +230,20 @@
         },
         {
             "name": "symfony/process",
-            "version": "v6.4.4",
+            "version": "v7.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "710e27879e9be3395de2b98da3f52a946039f297"
+                "reference": "0e7727191c3b71ebec6d529fa0e50a01ca5679e9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/710e27879e9be3395de2b98da3f52a946039f297",
-                "reference": "710e27879e9be3395de2b98da3f52a946039f297",
+                "url": "https://api.github.com/repos/symfony/process/zipball/0e7727191c3b71ebec6d529fa0e50a01ca5679e9",
+                "reference": "0e7727191c3b71ebec6d529fa0e50a01ca5679e9",
                 "shasum": ""
             },
             "require": {
-                "php": ">=8.1"
+                "php": ">=8.2"
             },
             "type": "library",
             "autoload": {
@@ -271,7 +271,7 @@
             "description": "Executes commands in sub-processes",
             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/process/tree/v6.4.4"
+                "source": "https://github.com/symfony/process/tree/v7.0.4"
             },
             "funding": [
                 {
@@ -287,7 +287,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-02-20T12:31:00+00:00"
+            "time": "2024-02-22T20:27:20+00:00"
         },
         {
             "name": "symfony/translation-contracts",
diff --git a/src/API/Process/Service/ProcessInterface.php b/src/API/Process/Service/ProcessInterface.php
index 2ca6dc0f0..911f0146a 100644
--- a/src/API/Process/Service/ProcessInterface.php
+++ b/src/API/Process/Service/ProcessInterface.php
@@ -53,7 +53,7 @@ public function getOutput(): string;
      *
      * @see \PhpTuf\ComposerStager\API\Process\Service\ProcessInterface::run
      */
-    public function mustRun(?OutputCallbackInterface $callback = null): self;
+    public function mustRun(?OutputCallbackInterface $callback = null): void;
 
     /**
      * Runs the process.
@@ -89,7 +89,7 @@ public function run(?OutputCallbackInterface $callback = null): int;
      *
      * @see \PhpTuf\ComposerStager\API\Process\Service\ProcessInterface::getEnv
      */
-    public function setEnv(array $env): self;
+    public function setEnv(array $env): void;
 
     /**
      * Sets the process timeout (max. runtime) in seconds.
@@ -101,5 +101,5 @@ public function setEnv(array $env): self;
      * @throws \PhpTuf\ComposerStager\API\Exception\InvalidArgumentException
      *   If the given timeout is negative.
      */
-    public function setTimeout(int $timeout = self::DEFAULT_TIMEOUT): self;
+    public function setTimeout(int $timeout = self::DEFAULT_TIMEOUT): void;
 }
diff --git a/src/Internal/Process/Service/Process.php b/src/Internal/Process/Service/Process.php
index ef4d71d1e..3cee56c88 100644
--- a/src/Internal/Process/Service/Process.php
+++ b/src/Internal/Process/Service/Process.php
@@ -98,7 +98,7 @@ public function getOutput(): string
         }
     }
 
-    public function mustRun(?OutputCallbackInterface $callback = null): self
+    public function mustRun(?OutputCallbackInterface $callback = null): void
     {
         try {
             $callbackAdapter = new OutputCallbackAdapter($callback);
@@ -110,8 +110,6 @@ public function mustRun(?OutputCallbackInterface $callback = null): self
                 $this->d()->exceptions(),
             ), 0, $e);
         }
-
-        return $this;
     }
 
     public function run(?OutputCallbackInterface $callback = null): int
@@ -129,15 +127,13 @@ public function run(?OutputCallbackInterface $callback = null): int
         }
     }
 
-    public function setEnv(array $env): ProcessInterface
+    public function setEnv(array $env): void
     {
         $this->assertValidEnv($env);
         $this->symfonyProcess->setEnv($env);
-
-        return $this;
     }
 
-    public function setTimeout(int $timeout = self::DEFAULT_TIMEOUT): self
+    public function setTimeout(int $timeout = self::DEFAULT_TIMEOUT): void
     {
         try {
             $this->symfonyProcess->setTimeout($timeout);
@@ -148,8 +144,6 @@ public function setTimeout(int $timeout = self::DEFAULT_TIMEOUT): self
                 $this->d()->exceptions(),
             ), 0, $e);
         }
-
-        return $this;
     }
 
     /**
diff --git a/tests/Compatability/CompatabilityFunctionalTest.php b/tests/Compatability/CompatabilityFunctionalTest.php
index a77178d07..15849e4a1 100644
--- a/tests/Compatability/CompatabilityFunctionalTest.php
+++ b/tests/Compatability/CompatabilityFunctionalTest.php
@@ -22,7 +22,8 @@ final class CompatabilityFunctionalTest extends TestCase
         '10.1.0',
         '10.1.2',
         // Next minor dev.
-        '11.x-dev',
+        // @todo Drupal 11.x now require PHP 8.3. Update the test setup for support.
+        //'11.x-dev',
     ];
 
     public static function setUpBeforeClass(): void
diff --git a/tests/Finder/Service/ExecutableFinderUnitTest.php b/tests/Finder/Service/ExecutableFinderUnitTest.php
index 3e9fda0ea..3be7b45ff 100644
--- a/tests/Finder/Service/ExecutableFinderUnitTest.php
+++ b/tests/Finder/Service/ExecutableFinderUnitTest.php
@@ -41,8 +41,7 @@ public function testFind(): void
         $command = 'command_name';
         $this->symfonyExecutableFinder
             ->addSuffix('.phar')
-            ->shouldBeCalled()
-            ->willReturn(null);
+            ->shouldBeCalled();
         $this->symfonyExecutableFinder
             ->find($command)
             ->shouldBeCalledOnce()
@@ -60,8 +59,7 @@ public function testFindNotFound(): void
         $command = 'command_name';
         $this->symfonyExecutableFinder
             ->addSuffix('.phar')
-            ->shouldBeCalledOnce()
-            ->willReturn(null);
+            ->shouldBeCalledOnce();
         $this->symfonyExecutableFinder
             ->find($command)
             ->shouldBeCalledOnce()
diff --git a/tests/Precondition/Service/ComposerIsAvailableUnitTest.php b/tests/Precondition/Service/ComposerIsAvailableUnitTest.php
index 8d4d49b9d..5755f6d0e 100644
--- a/tests/Precondition/Service/ComposerIsAvailableUnitTest.php
+++ b/tests/Precondition/Service/ComposerIsAvailableUnitTest.php
@@ -41,8 +41,7 @@ protected function setUp(): void
         $this->processFactory = $this->prophesize(ProcessFactoryInterface::class);
         $this->process = $this->prophesize(ProcessInterface::class);
         $this->process
-            ->mustRun()
-            ->willReturn($this->process);
+            ->mustRun();
         $this->process
             ->getOutput()
             ->willReturn(json_encode([
diff --git a/tests/Precondition/Service/RsyncIsAvailableUnitTest.php b/tests/Precondition/Service/RsyncIsAvailableUnitTest.php
index 5886e4140..f536752b3 100644
--- a/tests/Precondition/Service/RsyncIsAvailableUnitTest.php
+++ b/tests/Precondition/Service/RsyncIsAvailableUnitTest.php
@@ -41,8 +41,7 @@ protected function setUp(): void
         $this->processFactory = $this->prophesize(ProcessFactoryInterface::class);
         $this->process = $this->prophesize(ProcessInterface::class);
         $this->process
-            ->mustRun()
-            ->willReturn($this->process);
+            ->mustRun();
         $this->process
             ->getOutput()
             ->willReturn('');
diff --git a/tests/Process/Service/AbstractProcessRunnerUnitTest.php b/tests/Process/Service/AbstractProcessRunnerUnitTest.php
index a970ba502..585b433c6 100644
--- a/tests/Process/Service/AbstractProcessRunnerUnitTest.php
+++ b/tests/Process/Service/AbstractProcessRunnerUnitTest.php
@@ -37,11 +37,9 @@ protected function setUp(): void
         $this->processFactory = $this->prophesize(ProcessFactoryInterface::class);
         $this->process = $this->prophesize(ProcessInterface::class);
         $this->process
-            ->mustRun(Argument::any())
-            ->willReturn($this->process);
+            ->mustRun(Argument::any());
         $this->process
-            ->setTimeout(Argument::any())
-            ->willReturn($this->process);
+            ->setTimeout(Argument::any());
     }
 
     private function createSut($executableName = null): AbstractProcessRunner
@@ -100,12 +98,10 @@ public function testBasicFunctionality(
             ->shouldBeCalledOnce();
         $this->process
             ->setTimeout($timeout)
-            ->shouldBeCalledOnce()
-            ->willReturn($this->process);
+            ->shouldBeCalledOnce();
         $this->process
             ->mustRun($callback)
-            ->shouldBeCalledOnce()
-            ->willReturn($this->process);
+            ->shouldBeCalledOnce();
         $this->processFactory
             ->create(...$expectedFactoryArguments)
             ->shouldBeCalledOnce()
diff --git a/tests/Process/Service/ProcessUnitTest.php b/tests/Process/Service/ProcessUnitTest.php
index d724f965c..ed74a9411 100644
--- a/tests/Process/Service/ProcessUnitTest.php
+++ b/tests/Process/Service/ProcessUnitTest.php
@@ -124,21 +124,18 @@ public function testBasicFunctionality(
             ->shouldBeCalledOnce();
         $sut = $this->createSut($givenConstructorArguments);
 
-        $actualSetEnvReturn = $sut->setEnv($envVars);
+        $sut->setEnv($envVars);
         $actualEnv = $sut->getEnv();
         $actualOutput = $sut->getOutput();
         $actualErrorOutput = $sut->getErrorOutput();
-        $actualMustRunReturn = $sut->mustRun(...$givenRunArguments);
+        $sut->mustRun(...$givenRunArguments);
         $actualRunReturn = $sut->run(...$givenRunArguments);
-        $actualSetTimeoutReturn = $sut->setTimeout(...$givenSetTimeoutArguments);
+        $sut->setTimeout(...$givenSetTimeoutArguments);
 
         self::assertSame($actualEnv, $envVars, 'Returned correct output.');
         self::assertSame($output, $actualOutput, 'Returned correct output.');
         self::assertSame($errorOutput, $actualErrorOutput, 'Returned correct error output.');
-        self::assertSame($sut, $actualMustRunReturn, 'Returned "self" from ::mustRun().');
         self::assertSame($expectedRunReturn, $actualRunReturn, 'Returned correct status code from ::run().');
-        self::assertSame($sut, $actualSetEnvReturn, 'Returned "self" from ::setEnv().');
-        self::assertSame($sut, $actualSetTimeoutReturn, 'Returned "self" from ::setTimeout().');
     }
 
     public function providerBasicFunctionality(): array
diff --git a/tools/PHPCS/Sniffs/Commenting/ArchitectureLayerTagsSniff.php b/tools/PHPCS/Sniffs/Commenting/ArchitectureLayerTagsSniff.php
index 7f3df5c44..27d95cdad 100644
--- a/tools/PHPCS/Sniffs/Commenting/ArchitectureLayerTagsSniff.php
+++ b/tools/PHPCS/Sniffs/Commenting/ArchitectureLayerTagsSniff.php
@@ -53,7 +53,7 @@ public function process(File $phpcsFile, $stackPtr): void
         $this->phpcsFile = $phpcsFile;
         $this->scopePtr = $stackPtr;
 
-        $rule = $this->getApplicableRule($phpcsFile, $stackPtr);
+        $rule = $this->getApplicableRule();
 
         // Return early if no rules apply.
         if ($rule === false) {
@@ -154,9 +154,9 @@ public function getDocblockCloserPtr(): int
         return $docblockOpener['comment_closer'];
     }
 
-    private function getApplicableRule(File $phpcsFile, $stackPtr): array|false
+    private function getApplicableRule(): array|false
     {
-        $namespace = NamespaceHelper::getNamespace($phpcsFile, $stackPtr) . '\\';
+        $namespace = $this->getNamespace() . '\\';
 
         foreach (array_keys(self::RULES) as $rule) {
             if (str_starts_with($namespace, $rule)) {
@@ -167,6 +167,23 @@ private function getApplicableRule(File $phpcsFile, $stackPtr): array|false
         return false;
     }
 
+    /** @see \PHP_CodeSniffer\Standards\Squiz\Sniffs\Classes\SelfMemberReferenceSniff::getNamespaceOfScope() */
+    private function getNamespace(): string
+    {
+        $namespace = '\\';
+        $namespaceDeclaration = $this->phpcsFile->findPrevious(T_NAMESPACE, $this->scopePtr);
+
+        if ($namespaceDeclaration !== false) {
+            $endOfNamespaceDeclaration = $this->phpcsFile->findNext(
+                [T_SEMICOLON, T_OPEN_CURLY_BRACKET],
+                $namespaceDeclaration,
+            );
+            $namespace = NamespaceHelper::getNamespace($this->phpcsFile, $endOfNamespaceDeclaration - 1);
+        }
+
+        return $namespace;
+    }
+
     // Gets an array of docblock tag data, keyed by tag pointers with values of their end pointers.
     private function getDocblockTags(): array
     {
diff --git a/tools/PHPCS/Sniffs/Namespaces/AliasEndsWithAliasSniff.php b/tools/PHPCS/Sniffs/Namespaces/AliasEndsWithAliasSniff.php
index 90a430aa8..729d6a5e1 100644
--- a/tools/PHPCS/Sniffs/Namespaces/AliasEndsWithAliasSniff.php
+++ b/tools/PHPCS/Sniffs/Namespaces/AliasEndsWithAliasSniff.php
@@ -25,7 +25,7 @@ public function process(File $phpcsFile, $stackPtr): void
             return;
         }
 
-        $namespace = NamespaceHelper::getNamespace($phpcsFile, $stackPtr);
+        $namespace = $this->getNamespace($phpcsFile, $stackPtr);
 
         if (!str_ends_with($namespace, 'Alias')) {
             return;
@@ -62,6 +62,16 @@ private function isProjectFile(File $phpcsFile): bool
         return in_array($topLevelDir, ['src', 'tests', 'tools'], true);
     }
 
+    private function getNamespace(File $phpcsFile, int $scopePtr): string
+    {
+        $endOfNamespaceDeclaration = NamespaceHelper::getEndOfNamespaceDeclaration($phpcsFile, $scopePtr);
+
+        return $this->getDeclarationNameWithNamespace(
+            $phpcsFile->getTokens(),
+            $endOfNamespaceDeclaration - 1,
+        );
+    }
+
     private function isScopeLevelNamespace(File $phpcsFile, int $stackPtr): bool
     {
         $scopePtr = $phpcsFile->findNext(Tokens::$ooScopeTokens, $stackPtr);
@@ -77,4 +87,28 @@ private function aliasIsFound(File $phpcsFile, int $stackPtr): bool
 
         return $asKeywordPtr !== false;
     }
+
+    private function getDeclarationNameWithNamespace(array $tokens, $stackPtr): string
+    {
+        $nameParts = [];
+        $currentPointer = $stackPtr;
+
+        while ($tokens[$currentPointer]['code'] === T_NS_SEPARATOR
+            || $tokens[$currentPointer]['code'] === T_STRING
+            || isset(Tokens::$emptyTokens[$tokens[$currentPointer]['code']])
+        ) {
+            if (isset(Tokens::$emptyTokens[$tokens[$currentPointer]['code']])) {
+                --$currentPointer;
+
+                continue;
+            }
+
+            $nameParts[] = $tokens[$currentPointer]['content'];
+            --$currentPointer;
+        }
+
+        $nameParts = array_reverse($nameParts);
+
+        return implode('', $nameParts);
+    }
 }
diff --git a/tools/PHPCS/Sniffs/Namespaces/InternalLayerDependsOnNonProductionCodeSniff.php b/tools/PHPCS/Sniffs/Namespaces/InternalLayerDependsOnNonProductionCodeSniff.php
index 2eaf18b29..93910eb3c 100644
--- a/tools/PHPCS/Sniffs/Namespaces/InternalLayerDependsOnNonProductionCodeSniff.php
+++ b/tools/PHPCS/Sniffs/Namespaces/InternalLayerDependsOnNonProductionCodeSniff.php
@@ -25,7 +25,7 @@ public function process(File $phpcsFile, $stackPtr): void
             return;
         }
 
-        $namespace = NamespaceHelper::getNamespace($phpcsFile, $stackPtr);
+        $namespace = $this->getNamespace($phpcsFile, $stackPtr);
 
         // Not a scope-level namespace, e.g., a class or interface.
         // (It's probably an anonymous function declaration.)
@@ -56,6 +56,16 @@ private function isInternalFile(File $phpcsFile): bool
         return str_starts_with($phpcsFile->getFilename(), $srcDir);
     }
 
+    private function getNamespace(File $phpcsFile, int $scopePtr): string
+    {
+        $endOfNamespaceDeclaration = NamespaceHelper::getEndOfNamespaceDeclaration($phpcsFile, $scopePtr);
+
+        return NamespaceHelper::getDeclarationNameWithNamespace(
+            $phpcsFile->getTokens(),
+            $endOfNamespaceDeclaration - 1,
+        );
+    }
+
     private function isScopeLevelNamespace(File $phpcsFile, int $stackPtr): bool
     {
         $scopePtr = $phpcsFile->findNext(Tokens::$ooScopeTokens, $stackPtr);
@@ -87,7 +97,7 @@ private function getClassNamespace(File $phpcsFile): string
         $namespaceTokenPtr = $phpcsFile->findNext(T_NAMESPACE, 0);
         $namespacePtr = $phpcsFile->findNext(T_STRING, $namespaceTokenPtr);
 
-        return NamespaceHelper::getNamespace($phpcsFile, $namespacePtr);
+        return $this->getNamespace($phpcsFile, $namespacePtr);
     }
 
     private function getClassName(File $phpcsFile): mixed