diff --git a/extension.json b/extension.json
index 3b3181e2d..bfa4fa82f 100644
--- a/extension.json
+++ b/extension.json
@@ -78,10 +78,6 @@
 			"description": "Specify a REST endpoint where summaries should be sourced from. Endpoint must meet the spec at https://www.mediawiki.org/wiki/Specs/Summary/1.2.0",
 			"value": "/api/rest_v1/page/summary/"
 		},
-		"PopupsReferencePreviews": {
-			"description": "Feature flag to enable or disable the separate popup type for references created via the Cite extension's <ref> tag.",
-			"value": true
-		},
 		"PopupsStatsvSamplingRate": {
 			"description": "Sampling rate for logging performance data to statsv.",
 			"value": 0
diff --git a/includes/PopupsContext.php b/includes/PopupsContext.php
index a3d446aaf..ad40e4be8 100644
--- a/includes/PopupsContext.php
+++ b/includes/PopupsContext.php
@@ -150,10 +150,6 @@ class PopupsContext {
 	 * @return bool whether or not to show reference previews
 	 */
 	public function isReferencePreviewsEnabled( User $user ) {
-		if ( !$this->config->get( 'PopupsReferencePreviews' ) ) {
-			return false;
-		}
-
 		return !$user->isNamed() || $this->userOptionsLookup->getBoolOption(
 			$user, self::REFERENCE_PREVIEWS_PREFERENCE_NAME
 		);
diff --git a/includes/PopupsHooks.php b/includes/PopupsHooks.php
index 53dd548f1..0308d56c5 100644
--- a/includes/PopupsHooks.php
+++ b/includes/PopupsHooks.php
@@ -101,14 +101,10 @@ class PopupsHooks implements
 		}
 
 		$skinPosition = array_search( 'skin', array_keys( $prefs ) );
-		$readingOptions = $this->getPagePreviewPrefToggle( $user );
-
-		if ( $this->config->get( 'PopupsReferencePreviews' ) ) {
-			$readingOptions = array_merge(
-				$readingOptions,
-				$this->getReferencePreviewPrefToggle( $user )
-			);
-		}
+		$readingOptions = array_merge(
+			$this->getPagePreviewPrefToggle( $user ),
+			$this->getReferencePreviewPrefToggle( $user )
+		);
 
 		if ( $skinPosition !== false ) {
 			$injectIntoIndex = $skinPosition + 1;
@@ -251,9 +247,6 @@ class PopupsHooks implements
 	public function onUserGetDefaultOptions( &$defaultOptions ) {
 		$default = $this->config->get( 'PopupsOptInDefaultState' );
 		$defaultOptions[PopupsContext::PREVIEWS_OPTIN_PREFERENCE_NAME] = $default;
-
-		if ( $this->config->get( 'PopupsReferencePreviews' ) ) {
-			$defaultOptions[PopupsContext::REFERENCE_PREVIEWS_PREFERENCE_NAME] = '1';
-		}
+		$defaultOptions[PopupsContext::REFERENCE_PREVIEWS_PREFERENCE_NAME] = '1';
 	}
 }
diff --git a/tests/phpunit/PopupsContextTest.php b/tests/phpunit/PopupsContextTest.php
index d8e08f81d..2aa292ca1 100644
--- a/tests/phpunit/PopupsContextTest.php
+++ b/tests/phpunit/PopupsContextTest.php
@@ -22,7 +22,6 @@
 use MediaWiki\Config\GlobalVarConfig;
 use MediaWiki\MainConfigNames;
 use MediaWiki\Title\Title;
-use MediaWiki\User\Options\UserOptionsLookup;
 use MediaWiki\User\User;
 use PHPUnit\Framework\MockObject\Stub\ConsecutiveCalls;
 use Popups\PopupsContext;
@@ -109,45 +108,6 @@ class PopupsContextTest extends MediaWikiIntegrationTestCase {
 		);
 	}
 
-	/**
-	 * Tests #shouldSendModuleToUser when the user is logged in and the reference previews feature
-	 * is disabled.
-	 *
-	 * @covers ::shouldSendModuleToUser
-	 * @dataProvider provideTestDataForShouldSendModuleToUser
-	 * @param bool $optIn
-	 * @param bool $expected
-	 */
-	public function testShouldSendModuleToUser( $optIn, $expected ) {
-		$this->overrideConfigValue( 'PopupsReferencePreviews', false );
-
-		$user = $this->createMock( User::class );
-		$user->method( 'isNamed' )->willReturn( true );
-		$userOptLookup = $this->createMock( UserOptionsLookup::class );
-		$userOptLookup->method( 'getBoolOption' )
-			->with( $user, PopupsContext::PREVIEWS_OPTIN_PREFERENCE_NAME )
-			->willReturn( $optIn );
-		$this->setService( 'UserOptionsLookup', $userOptLookup );
-
-		$context = $this->getContext();
-		$this->assertSame( $expected,
-			$context->shouldSendModuleToUser( $user ),
-			( $expected ? 'A' : 'No' ) . ' module is sent to the user.' );
-	}
-
-	public static function provideTestDataForShouldSendModuleToUser() {
-		return [
-			[
-				'optin' => PopupsContext::PREVIEWS_ENABLED,
-				'expected' => true
-			],
-			[
-				'optin' => PopupsContext::PREVIEWS_DISABLED,
-				'expected' => false
-			]
-		];
-	}
-
 	/**
 	 * @covers ::areDependenciesMet
 	 * @covers ::__construct
diff --git a/tests/phpunit/PopupsHooksTest.php b/tests/phpunit/PopupsHooksTest.php
index 584efec79..776773c39 100644
--- a/tests/phpunit/PopupsHooksTest.php
+++ b/tests/phpunit/PopupsHooksTest.php
@@ -61,16 +61,15 @@ class PopupsHooksTest extends MediaWikiIntegrationTestCase {
 
 	/**
 	 * @covers ::onGetPreferences
-	 * @dataProvider provideReferencePreviewsFlag
 	 */
-	public function testOnGetPreferencesNavPopupGadgetIsOn( bool $enabled ) {
+	public function testOnGetPreferencesNavPopupGadgetIsOn() {
 		$userMock = $this->createMock( User::class );
 
 		$contextMock = $this->createMock( PopupsContext::class );
 		$contextMock->expects( $this->once() )
 			->method( 'showPreviewsOptInOnPreferencesPage' )
 			->willReturn( true );
-		$contextMock->expects( $this->exactly( $enabled ? 2 : 1 ) )
+		$contextMock->expects( $this->exactly( 2 ) )
 			->method( 'conflictsWithNavPopupsGadget' )
 			->with( $userMock )
 			->willReturn( true );
@@ -78,9 +77,7 @@ class PopupsHooksTest extends MediaWikiIntegrationTestCase {
 		$prefs = [];
 
 		( new PopupsHooks(
-			new HashConfig( [
-				'PopupsReferencePreviews' => $enabled,
-			] ),
+			new HashConfig(),
 			$contextMock,
 			$this->getServiceContainer()->getService( 'Popups.Logger' ),
 			$this->getServiceContainer()->getUserOptionsManager()
@@ -101,14 +98,13 @@ class PopupsHooksTest extends MediaWikiIntegrationTestCase {
 
 	/**
 	 * @covers ::onGetPreferences
-	 * @dataProvider provideReferencePreviewsFlag
 	 */
-	public function testOnGetPreferencesPreviewsEnabled( bool $enabled ) {
+	public function testOnGetPreferencesPreviewsEnabled() {
 		$contextMock = $this->createMock( PopupsContext::class );
 		$contextMock->expects( $this->once() )
 			->method( 'showPreviewsOptInOnPreferencesPage' )
 			->willReturn( true );
-		$contextMock->expects( $this->exactly( $enabled ? 2 : 1 ) )
+		$contextMock->expects( $this->exactly( 2 ) )
 			->method( 'conflictsWithNavPopupsGadget' )
 			->willReturn( false );
 
@@ -119,9 +115,7 @@ class PopupsHooksTest extends MediaWikiIntegrationTestCase {
 		];
 
 		( new PopupsHooks(
-			new HashConfig( [
-				'PopupsReferencePreviews' => $enabled,
-			] ),
+			new HashConfig(),
 			$contextMock,
 			$this->getServiceContainer()->getService( 'Popups.Logger' ),
 			$this->getServiceContainer()->getUserOptionsManager()
@@ -142,14 +136,13 @@ class PopupsHooksTest extends MediaWikiIntegrationTestCase {
 
 	/**
 	 * @covers ::onGetPreferences
-	 * @dataProvider provideReferencePreviewsFlag
 	 */
-	public function testOnGetPreferencesPreviewsEnabledWhenSkinIsNotAvailable( bool $enabled ) {
+	public function testOnGetPreferencesPreviewsEnabledWhenSkinIsNotAvailable() {
 		$contextMock = $this->createMock( PopupsContext::class );
 		$contextMock->expects( $this->once() )
 			->method( 'showPreviewsOptInOnPreferencesPage' )
 			->willReturn( true );
-		$contextMock->expects( $this->exactly( $enabled ? 2 : 1 ) )
+		$contextMock->expects( $this->exactly( 2 ) )
 			->method( 'conflictsWithNavPopupsGadget' )
 			->willReturn( false );
 
@@ -159,9 +152,7 @@ class PopupsHooksTest extends MediaWikiIntegrationTestCase {
 		];
 
 		( new PopupsHooks(
-			new HashConfig( [
-				'PopupsReferencePreviews' => $enabled,
-			] ),
+			new HashConfig(),
 			$contextMock,
 			$this->getServiceContainer()->getService( 'Popups.Logger' ),
 			$this->getServiceContainer()->getUserOptionsManager()
@@ -317,9 +308,8 @@ class PopupsHooksTest extends MediaWikiIntegrationTestCase {
 
 	/**
 	 * @covers ::onUserGetDefaultOptions
-	 * @dataProvider provideReferencePreviewsFlag
 	 */
-	public function testOnUserGetDefaultOptions( bool $enabled ) {
+	public function testOnUserGetDefaultOptions() {
 		$userOptions = [
 			'test' => 'not_empty'
 		];
@@ -327,25 +317,15 @@ class PopupsHooksTest extends MediaWikiIntegrationTestCase {
 		( new PopupsHooks(
 			new HashConfig( [
 				'PopupsOptInDefaultState' => '1',
-				'PopupsReferencePreviews' => $enabled,
 			] ),
 			$this->getServiceContainer()->getService( 'Popups.Context' ),
 			$this->getServiceContainer()->getService( 'Popups.Logger' ),
 			$this->getServiceContainer()->getUserOptionsManager()
 		) )
 			->onUserGetDefaultOptions( $userOptions );
-		$this->assertCount( $enabled ? 3 : 2, $userOptions );
+		$this->assertCount( 3, $userOptions );
 		$this->assertSame( '1', $userOptions[ PopupsContext::PREVIEWS_OPTIN_PREFERENCE_NAME ] );
-		if ( $enabled ) {
-			$this->assertSame( '1', $userOptions[ PopupsContext::REFERENCE_PREVIEWS_PREFERENCE_NAME ] );
-		}
-	}
-
-	public static function provideReferencePreviewsFlag() {
-		return [
-			[ false ],
-			[ true ],
-		];
+		$this->assertSame( '1', $userOptions[ PopupsContext::REFERENCE_PREVIEWS_PREFERENCE_NAME ] );
 	}
 
 }