diff --git a/tests/phpunit/unit/MathWikibaseConnectorTestFactory.php b/tests/phpunit/unit/MathWikibaseConnectorTestFactory.php
index 6bc6fae1a..90901d1df 100644
--- a/tests/phpunit/unit/MathWikibaseConnectorTestFactory.php
+++ b/tests/phpunit/unit/MathWikibaseConnectorTestFactory.php
@@ -3,6 +3,7 @@
 namespace MediaWiki\Extension\Math\Tests;
 
 use DataValues\StringValue;
+use ExtensionRegistry;
 use Language;
 use MediaWiki\Config\ServiceOptions;
 use MediaWiki\Extension\Math\MathFormatter;
@@ -50,6 +51,13 @@ class MathWikibaseConnectorTestFactory extends MediaWikiUnitTestCase {
 			]
 		];
 
+	public static function setUpBeforeClass(): void {
+		if ( !ExtensionRegistry::getInstance()->isLoaded( 'WikibaseClient' ) ) {
+			self::markTestSkipped( 'WikibaseClient is not installed. Skipping tests.' );
+		}
+		parent::setUpBeforeClass();
+	}
+
 	public function getWikibaseConnectorWithExistingItems(
 		EntityRevision $entityRevision,
 		bool $storageExceptionOnQ3 = false,