diff --git a/tests/phpunit/CiteHooksTest.php b/tests/phpunit/CiteHooksTest.php
new file mode 100644
index 000000000..e9e2b3125
--- /dev/null
+++ b/tests/phpunit/CiteHooksTest.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace Cite\Test;
+
+use ApiQuerySiteinfo;
+use CiteHooks;
+use HashBagOStuff;
+use LinksUpdate;
+use Title;
+use WANObjectCache;
+
+/**
+ * @coversDefaultClass \CiteHooks
+ */
+class CiteHooksTest extends \MediaWikiIntegrationTestCase {
+
+	protected function setUp() : void {
+		parent::setUp();
+
+		$this->setMwGlobals( [
+			'wgCiteStoreReferencesData' => true,
+		] );
+	}
+
+	/**
+	 * @covers ::onLinksUpdateComplete
+	 */
+	public function testOnLinksUpdateComplete() {
+		$cache = $this->getMockBuilder( WANObjectCache::class )
+			->setConstructorArgs( [ [ 'cache' => new HashBagOStuff() ] ] )
+			->setMethods( [ 'makeKey', 'relayPurge' ] )
+			->getMock();
+		$cache->method( 'makeKey' )
+			->willReturn( '<KEY>' );
+		// What we actually want to check here is if WANObjectCache::delete() is called, but it's
+		// final and can't be mocked.
+		$cache->expects( $this->once() )
+			->method( 'relayPurge' )
+			->with(
+				'WANCache:v:<KEY>',
+				WANObjectCache::MAX_COMMIT_DELAY,
+				WANObjectCache::HOLDOFF_TTL_NONE
+			);
+		$this->setService( 'MainWANObjectCache', $cache );
+
+		$linksUpdate = $this->createMock( LinksUpdate::class );
+		$linksUpdate->method( 'getAddedProperties' )
+			->willReturn( [ 'references-1' => true ] );
+		$linksUpdate->method( 'getTitle' )
+			->willReturn( $this->createMock( Title::class ) );
+
+		CiteHooks::onLinksUpdateComplete( $linksUpdate );
+	}
+
+	/**
+	 * @covers ::onResourceLoaderGetConfigVars
+	 */
+	public function testOnResourceLoaderGetConfigVars() {
+		$vars = [];
+
+		CiteHooks::onResourceLoaderGetConfigVars( $vars );
+
+		$this->assertArrayHasKey( 'wgCiteVisualEditorOtherGroup', $vars );
+		$this->assertArrayHasKey( 'wgCiteResponsiveReferences', $vars );
+	}
+
+	/**
+	 * @covers ::onAPIQuerySiteInfoGeneralInfo
+	 */
+	public function testOnAPIQuerySiteInfoGeneralInfo() {
+		$api = $this->createMock( ApiQuerySiteinfo::class );
+		$data = [];
+
+		CiteHooks::onAPIQuerySiteInfoGeneralInfo( $api, $data );
+
+		$this->assertArrayHasKey( 'citeresponsivereferences', $data );
+	}
+
+}
diff --git a/tests/phpunit/unit/CiteHooksTest.php b/tests/phpunit/unit/CiteHooksTest.php
new file mode 100644
index 000000000..c8b53d784
--- /dev/null
+++ b/tests/phpunit/unit/CiteHooksTest.php
@@ -0,0 +1,105 @@
+<?php
+
+namespace Cite\Test\Unit;
+
+use Cite;
+use CiteHooks;
+use HashConfig;
+use LinksUpdate;
+use Parser;
+use ParserOutput;
+use ResourceLoader;
+use Title;
+
+/**
+ * @coversDefaultClass \CiteHooks
+ */
+class CiteHooksTest extends \MediaWikiUnitTestCase {
+
+	protected function setUp() : void {
+		global $wgCiteStoreReferencesData;
+
+		parent::setUp();
+		$wgCiteStoreReferencesData = true;
+	}
+
+	/**
+	 * @covers ::onParserFirstCallInit
+	 */
+	public function testOnParserFirstCallInit() {
+		$parser = $this->createMock( Parser::class );
+		$parser->expects( $this->exactly( 2 ) )
+			->method( 'setHook' )
+			->withConsecutive(
+				[ 'ref', $this->isType( 'callable' ) ],
+				[ 'references', $this->isType( 'callable' ) ]
+			);
+
+		CiteHooks::onParserFirstCallInit( $parser );
+
+		$this->assertInstanceOf( Cite::class, $parser->extCite );
+	}
+
+	/**
+	 * @covers ::onContentHandlerDefaultModelFor
+	 */
+	public function testOnContentHandlerDefaultModelFor() {
+		$title = $this->createMock( Title::class );
+		$title->method( 'inNamespace' )
+			->willReturn( true );
+		$title->method( 'getText' )
+			->willReturn( 'Cite-tool-definition.json' );
+
+		CiteHooks::onContentHandlerDefaultModelFor( $title, $model );
+
+		$this->assertSame( CONTENT_MODEL_JSON, $model );
+	}
+
+	/**
+	 * @covers ::onResourceLoaderTestModules
+	 */
+	public function testOnResourceLoaderTestModules() {
+		$testModules = [];
+		$resourceLoader = $this->createMock( ResourceLoader::class );
+		$resourceLoader->method( 'getConfig' )
+			->willReturn( new HashConfig( [
+				'ResourceModules' => [ 'ext.visualEditor.mediawiki' => true ],
+			] ) );
+
+		CiteHooks::onResourceLoaderTestModules( $testModules, $resourceLoader );
+
+		$this->assertArrayHasKey( 'ext.cite.visualEditor.test', $testModules['qunit'] );
+	}
+
+	/**
+	 * @covers ::onResourceLoaderRegisterModules
+	 */
+	public function testOnResourceLoaderRegisterModules() {
+		$resourceLoader = $this->createMock( ResourceLoader::class );
+		$resourceLoader->expects( $this->atLeastOnce() )
+			->method( 'register' );
+
+		CiteHooks::onResourceLoaderRegisterModules( $resourceLoader );
+	}
+
+	/**
+	 * @covers ::onLinksUpdate
+	 */
+	public function testOnLinksUpdate() {
+		$parserOutput = $this->createMock( ParserOutput::class );
+		$parserOutput->method( 'getExtensionData' )
+			->willReturn( true );
+		$parserOutput->expects( $this->once() )
+			->method( 'setExtensionData' )
+			->with( Cite::EXT_DATA_KEY, null );
+
+		$linksUpdate = $this->createMock( LinksUpdate::class );
+		$linksUpdate->method( 'getParserOutput' )
+			->willReturn( $parserOutput );
+
+		CiteHooks::onLinksUpdate( $linksUpdate );
+
+		$this->assertArrayHasKey( 'references-1', $linksUpdate->mProperties );
+	}
+
+}