diff --git a/tests/phpunit/RevisionSliderHooksTest.php b/tests/phpunit/RevisionSliderHooksTest.php
new file mode 100644
index 00000000..f3169f2a
--- /dev/null
+++ b/tests/phpunit/RevisionSliderHooksTest.php
@@ -0,0 +1,114 @@
+<?php
+
+use MediaWiki\Extension\RevisionSlider\RevisionSliderHooks;
+use MediaWiki\Revision\RevisionRecord;
+use MediaWiki\User\StaticUserOptionsLookup;
+
+/**
+ * @covers \MediaWiki\Extension\RevisionSlider\RevisionSliderHooks
+ */
+class RevisionSliderHooksTest extends \MediaWikiIntegrationTestCase {
+
+	public function testShouldNotLoadWithoutRevisions() {
+		// Assert
+		$output = null;
+
+		// Arrange
+		$diffEngine = $this->newDiffEngine( null, $output );
+
+		// Act
+		$this->newInstance()->onDifferenceEngineViewHeader( $diffEngine );
+	}
+
+	public function testShouldNotLoadOnMobileDiff() {
+		// Arrange
+		$title = $this->createMock( Title::class );
+		$title->method( 'isSpecial' )
+			->with( 'MobileDiff' )
+			->willReturn( true );
+
+		$output = $this->createMock( OutputPage::class );
+		$output->method( 'getTitle' )
+			->willReturn( $title );
+
+		$revision = $this->createMock( RevisionRecord::class );
+		$diffEngine = $this->newDiffEngine( $revision, $output );
+
+		// Assert
+		$output->expects( $this->never() )
+			->method( 'addModules' );
+
+		// Act
+		$this->newInstance()->onDifferenceEngineViewHeader( $diffEngine );
+	}
+
+	public function testShouldNotLoadWhenUserIsLoggedInAndDisabledExtension() {
+		// Arrange
+		$options = [ 'revisionslider-disable' => true ];
+		$user = $this->createMock( User::class );
+		$user->method( 'isNamed' )
+			->willReturn( true );
+
+		$output = $this->createMock( OutputPage::class );
+		$output->method( 'getTitle' )
+			->willReturn( $this->createMock( Title::class ) );
+
+		$revision = $this->createMock( RevisionRecord::class );
+		$diffEngine = $this->newDiffEngine( $revision, $output, $user );
+
+		// Assert
+		$output->expects( $this->never() )
+			->method( 'addModules' );
+
+		// Act
+		$this->newInstance( $options )->onDifferenceEngineViewHeader( $diffEngine );
+	}
+
+	public function testOnGetPreferences() {
+		// Arrange
+		$user = $this->createMock( User::class );
+		$preferences = [];
+
+		// Act
+		$this->newInstance()->onGetPreferences( $user, $preferences );
+
+		// Assert
+		$this->assertArrayHasKey( 'revisionslider-disable', $preferences );
+		$item = $preferences['revisionslider-disable'];
+		$this->assertSame( 'toggle', $item['type'] );
+		$this->assertSame( 'revisionslider-preference-disable', $item['label-message'] );
+		$this->assertSame( 'rendering/diffs', $item['section'] );
+	}
+
+	public function newInstance( array $options = [] ): RevisionSliderHooks {
+		$configFactory = $this->createMock( ConfigFactory::class );
+		$configFactory->method( 'makeConfig' )
+			->willReturn( new HashConfig() );
+
+		return new RevisionSliderHooks(
+			$configFactory,
+			new StaticUserOptionsLookup( [], $options ),
+			new NullStatsdDataFactory()
+		);
+	}
+
+	private function newDiffEngine(
+		?RevisionRecord $revision,
+		?OutputPage $output,
+		?User $user = null
+	): DifferenceEngine {
+		$diffEngine = $this->createMock( DifferenceEngine::class );
+		$diffEngine->method( 'getOldRevision' )
+			->willReturn( $revision );
+		$diffEngine->method( 'getNewRevision' )
+			->willReturn( $revision );
+		$diffEngine->expects( $output ? $this->atLeastOnce() : $this->never() )
+			->method( 'getOutput' )
+			->willReturn( $output );
+		$diffEngine->expects( $user ? $this->once() : $this->never() )
+			->method( 'getUser' )
+			->willReturn( $user );
+		return $diffEngine;
+	}
+
+}