diff --git a/includes/resourceloader/ResourceLoaderImage.php b/includes/resourceloader/ResourceLoaderImage.php
index bea192d4f7c..73d5fc48067 100644
--- a/includes/resourceloader/ResourceLoaderImage.php
+++ b/includes/resourceloader/ResourceLoaderImage.php
@@ -18,6 +18,8 @@
  * @file
  */
 
+use MediaWiki\MediaWikiServices;
+use MediaWiki\Languages\LanguageFallback;
 use MediaWiki\Shell\Shell;
 
 /**
@@ -141,6 +143,17 @@ class ResourceLoaderImage {
 		return array_keys( $this->variants );
 	}
 
+	/**
+	 * @internal For unit testing overrride
+	 * @param string $lang
+	 * @return string[]
+	 */
+	protected function getLangFallbacks( string $lang ) : array {
+		return MediaWikiServices::getInstance()
+			->getLanguageFallback()
+			->getAll( $lang, LanguageFallback::STRICT );
+	}
+
 	/**
 	 * Get the path to image file for given context.
 	 *
@@ -158,7 +171,7 @@ class ResourceLoaderImage {
 			if ( isset( $desc['lang'][$contextLang] ) ) {
 				return $this->getLocalPath( $desc['lang'][$contextLang] );
 			}
-			$fallbacks = Language::getFallbacksFor( $contextLang, Language::STRICT_FALLBACKS );
+			$fallbacks = $this->getLangFallbacks( $contextLang );
 			foreach ( $fallbacks as $lang ) {
 				if ( isset( $desc['lang'][$lang] ) ) {
 					return $this->getLocalPath( $desc['lang'][$lang] );
diff --git a/tests/phpunit/unit/includes/resourceloader/ResourceLoaderImageTest.php b/tests/phpunit/unit/includes/resourceloader/ResourceLoaderImageTest.php
index 5d53c302e7e..34f24daed25 100644
--- a/tests/phpunit/unit/includes/resourceloader/ResourceLoaderImageTest.php
+++ b/tests/phpunit/unit/includes/resourceloader/ResourceLoaderImageTest.php
@@ -53,7 +53,6 @@ class ResourceLoaderImageTest extends MediaWikiUnitTestCase {
 	 * @dataProvider provideGetPath
 	 */
 	public function testGetPath( $imageName, $languageCode, $path ) {
-		$this->markTestSkipped( 'Depends on overriding LanguageFallback/LocalisationCache' );
 		static $dirMap = [
 			'en' => 'ltr',
 			'en-gb' => 'ltr',
@@ -70,13 +69,6 @@ class ResourceLoaderImageTest extends MediaWikiUnitTestCase {
 		);
 		$context->setLanguage( $languageCode );
 		$context->setDirection( $dirMap[$languageCode] );
-		Language::$dataCache = $this->createMock( LocalisationCache::class );
-		Language::$dataCache->method( 'getItem' )->will( $this->returnCallback( function ( $code ) {
-			return ( [
-				'en-gb' => [ 'en' ],
-				'de-formal' => [ 'de' ],
-			] )[ $code ] ?? [];
-		} ) );
 
 		$this->assertEquals( $image->getPath( $context ), $this->imagesPath . '/' . $path );
 	}
@@ -121,6 +113,11 @@ class ResourceLoaderImageTest extends MediaWikiUnitTestCase {
 }
 
 class ResourceLoaderImageTestable extends ResourceLoaderImage {
+	private $mockFallbacks = [
+		'en-gb' => [ 'en' ],
+		'de-formal' => [ 'de' ],
+	];
+
 	// Make some protected methods public
 	public function massageSvgPathdata( $svg ) {
 		return parent::massageSvgPathdata( $svg );
@@ -130,4 +127,8 @@ class ResourceLoaderImageTestable extends ResourceLoaderImage {
 	public function rasterize( $svg ) {
 		return 'RASTERIZESTUB';
 	}
+
+	protected function getLangFallbacks( string $code ) : array {
+		return $this->mockFallbacks[$code] ?? [];
+	}
 }