diff --git a/app/code/Magento/Csp/Model/Collector/CspWhitelistXml/FileResolver.php b/app/code/Magento/Csp/Model/Collector/CspWhitelistXml/FileResolver.php
index acc0dd1600db..58a7f2e58f12 100644
--- a/app/code/Magento/Csp/Model/Collector/CspWhitelistXml/FileResolver.php
+++ b/app/code/Magento/Csp/Model/Collector/CspWhitelistXml/FileResolver.php
@@ -1,22 +1,22 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2020 Adobe
+ * All Rights Reserved.
  */
 
 declare(strict_types=1);
 
 namespace Magento\Csp\Model\Collector\CspWhitelistXml;
 
+use Magento\Framework\App\Filesystem\DirectoryList;
+use Magento\Framework\Config\CompositeFileIteratorFactory;
 use Magento\Framework\Config\FileResolverInterface;
 use Magento\Framework\Filesystem;
-use Magento\Framework\View\Design\ThemeInterface;
-use Magento\Framework\View\DesignInterface;
+use Magento\Framework\Filesystem\Directory\ReadInterface as DirectoryRead;
 use Magento\Framework\View\Design\Theme\CustomizationInterface;
 use Magento\Framework\View\Design\Theme\CustomizationInterfaceFactory;
-use Magento\Framework\App\Filesystem\DirectoryList;
-use Magento\Framework\Filesystem\Directory\ReadInterface as DirectoryRead;
-use Magento\Framework\Config\CompositeFileIteratorFactory;
+use Magento\Framework\View\Design\ThemeInterface;
+use Magento\Framework\View\DesignInterface;
 
 /**
  * Combines configuration files from both modules and current theme.
@@ -74,22 +74,29 @@ public function __construct(
      */
     public function get($filename, $scope)
     {
-         $configs = $this->moduleFileResolver->get($filename, $scope);
-        if ($scope === 'global') {
-            $files = [];
-            $theme = $this->theme;
-            while ($theme) {
-                /** @var CustomizationInterface $info */
-                $info = $this->themeInfoFactory->create(['theme' => $theme]);
-                $file = $info->getThemeFilesPath() .'/etc/' .$filename;
-                if ($this->rootDir->isExist($file)) {
-                    $files[] = $file;
+        $configs = $this->moduleFileResolver->get($filename, $scope);
+
+        switch ($scope) {
+            case 'frontend':
+            case 'adminhtml':
+                $files = [];
+                $theme = $this->theme;
+                while ($theme) {
+                    /** @var CustomizationInterface $info */
+                    $info = $this->themeInfoFactory->create(['theme' => $theme]);
+                    $file = $info->getThemeFilesPath() . '/etc/' . $filename;
+                    if ($this->rootDir->isExist($file)) {
+                        $files[] = $file;
+                    }
+                    $theme = $theme->getParentTheme();
                 }
-                $theme = $theme->getParentTheme();
-            }
-            $configs = $this->iteratorFactory->create(
-                ['paths' => array_reverse($files), 'existingIterator' => $configs]
-            );
+                $configs = $this->iteratorFactory->create(
+                    ['paths' => array_reverse($files), 'existingIterator' => $configs]
+                );
+                break;
+            case 'global':
+            default:
+                break;
         }
 
         return $configs;
diff --git a/app/code/Magento/Csp/Test/Unit/Model/Collector/CspWhitelistXml/FileResolverTest.php b/app/code/Magento/Csp/Test/Unit/Model/Collector/CspWhitelistXml/FileResolverTest.php
new file mode 100644
index 000000000000..cb691d69d10d
--- /dev/null
+++ b/app/code/Magento/Csp/Test/Unit/Model/Collector/CspWhitelistXml/FileResolverTest.php
@@ -0,0 +1,223 @@
+<?php
+/**
+ * Copyright 2025 Adobe
+ * All Rights Reserved.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\Csp\Test\Unit\Model\Collector\CspWhitelistXml;
+
+use Magento\Framework\Filesystem;
+use Magento\Framework\View\Design\Theme\CustomizationInterface;
+use Magento\Framework\View\Design\ThemeInterface;
+use PHPUnit\Framework\TestCase;
+use Magento\Framework\Config\FileResolverInterface;
+use Magento\Csp\Model\Collector\CspWhitelistXml\FileResolver;
+use Magento\Framework\View\DesignInterface;
+use Magento\Framework\Config\CompositeFileIteratorFactory;
+use Magento\Framework\View\Design\Theme\CustomizationInterfaceFactory;
+use Magento\Framework\Filesystem\Directory\ReadInterface;
+use Magento\Framework\App\Filesystem\DirectoryList;
+
+class FileResolverTest extends TestCase
+{
+    /**
+     * @var FileResolver
+     */
+    private $model;
+
+    /**
+     * @var FileResolverInterface
+     */
+    private $moduleFileResolverMock;
+
+    /**
+     * @var DesignInterface
+     */
+    private $designMock;
+
+    /**
+     * @var CustomizationInterfaceFactory
+     */
+    private $customizationFactoryMock;
+
+    /**
+     * @var Filesystem
+     */
+    private $filesystemMock;
+
+    /**
+     * @var CompositeFileIteratorFactory
+     */
+    private $iteratorFactoryMock;
+
+    /**
+     * @var ReadInterface
+     */
+    private $readInterfaceMock;
+
+    /**
+     * @var ThemeInterface
+     */
+    private $themeInterFaceMock;
+
+    /**
+     * @var CustomizationInterface
+     */
+    private $customizationInterfaceMock;
+
+    protected function setUp(): void
+    {
+        $this->moduleFileResolverMock = $this->getMockBuilder(FileResolverInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->designMock = $this->getMockBuilder(DesignInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->themeInterFaceMock = $this->getMockBuilder(ThemeInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->designMock->expects($this->once())
+            ->method('getDesignTheme')
+            ->willReturn($this->themeInterFaceMock);
+
+        $this->customizationFactoryMock = $this->getMockBuilder(CustomizationInterfaceFactory::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['create'])
+            ->getMock();
+
+        $this->customizationInterfaceMock = $this->getMockBuilder(CustomizationInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->filesystemMock = $this->createPartialMock(Filesystem::class, ['getDirectoryRead']);
+
+        $this->readInterfaceMock = $this->getMockBuilder(ReadInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->filesystemMock->expects($this->once())
+            ->method('getDirectoryRead')
+            ->with(DirectoryList::ROOT)
+            ->willReturn($this->readInterfaceMock);
+
+        $this->iteratorFactoryMock = $this->getMockBuilder(CompositeFileIteratorFactory::class)
+        ->disableOriginalConstructor()
+        ->getMock();
+
+        $this->model = new FileResolver(
+            $this->moduleFileResolverMock,
+            $this->designMock,
+            $this->customizationFactoryMock,
+            $this->filesystemMock,
+            $this->iteratorFactoryMock
+        );
+    }
+
+    /**
+     * Test for get method with frontend scope.
+     *
+     * @param string $scope
+     * @param string $fileName
+     * @param array $fileList
+     * @param string $themeFilesPath
+     *
+     * @return void
+     * @dataProvider providerGetFrontend
+     */
+    public function testGetFrontend(string $scope, string $fileName, array $fileList, string $themeFilesPath): void
+    {
+        $this->moduleFileResolverMock->expects($this->once())
+            ->method('get')
+            ->with($fileName, $scope)
+            ->willReturn($fileList);
+
+        $this->customizationFactoryMock->expects($this->any())
+            ->method('create')
+            ->with(['theme' => $this->themeInterFaceMock])
+            ->willReturn($this->customizationInterfaceMock);
+
+        $this->customizationInterfaceMock->expects($this->once())
+            ->method('getThemeFilesPath')
+            ->willReturn($themeFilesPath);
+
+        $this->readInterfaceMock->expects($this->once())
+            ->method('isExist')
+            ->with($themeFilesPath.'/etc/'.$fileName)
+            ->willReturn(true);
+
+        $this->iteratorFactoryMock->expects($this->once())
+            ->method('create')
+            ->with(
+                [
+                    'paths' => array_reverse([$themeFilesPath.'/etc/'.$fileName]),
+                    'existingIterator' => $fileList
+                ]
+            )
+            ->willReturn($fileList);
+
+        $this->assertEquals($fileList, $this->model->get($fileName, $scope));
+    }
+
+    /**
+     * Test for get method with global scope.
+     *
+     * @param string $scope
+     * @param string $fileName
+     * @param array $fileList
+     *
+     * @return void
+     * @dataProvider providerGetGlobal
+     */
+    public function testGetGlobal(string $scope, string $fileName, array $fileList): void
+    {
+        $this->moduleFileResolverMock->expects($this->once())
+            ->method('get')
+            ->with($fileName, $scope)
+            ->willReturn($fileList);
+        $this->assertEquals($fileList, $this->model->get($fileName, $scope));
+    }
+
+    /**
+     * Data provider for get global scope tests.
+     *
+     * @return array
+     */
+    public static function providerGetGlobal(): array
+    {
+        return [
+            [
+                'global',
+                'csp_whitelist.xml',
+                ['anyvendor/anymodule/etc/csp_whitelist.xml']
+            ]
+        ];
+    }
+
+    /**
+     * Data provider for get frontend & adminhtml scope tests.
+     *
+     * @return array
+     */
+    public static function providerGetFrontend(): array
+    {
+        return [
+            [
+                'frontend',
+                'csp_whitelist.xml',
+                ['themevendor/theme/etc/csp_whitelist.xml'],
+                'themevendor/theme'
+            ],
+            [
+                'adminhtml',
+                'csp_whitelist.xml',
+                ['adminthemevendor/admintheme/etc/csp_whitelist.xml'],
+                'adminthemevendor/admintheme'
+            ]
+        ];
+    }
+}