Fix logger mocking in BackendTest.

module/VuFindSearch/tests/unit-tests/src/VuFindTest/Backend/Blender/BackendTest.php

@@ -34,7 +34,7 @@
 use Laminas\EventManager\EventManager;
 use Laminas\EventManager\SharedEventManager;
 use PHPUnit\Framework\TestCase;
-use VuFind\Log\Logger;
+use Laminas\Log\LoggerInterface;
 use VuFind\RecordDriver\EDS as EDSRecord;
 use VuFind\RecordDriver\SolrMarc as SolrRecord;
 use VuFindSearch\Backend\Blender\Backend;
@@ -814,17 +814,15 @@ public function testInvalidFilter(): void
         $backend = $this->getBackend();
         $params = $this->getSearchParams(['blender_backend:Foo']);
 
-        $logger = $this->getMockBuilder(Logger::class)
-            ->disableOriginalConstructor()
-            ->getMock();
+        $logger = $this->createMock(LoggerInterface::class);
         $logger->expects($this->once())
             ->method('warn')
             ->with(
                 'VuFindSearch\Backend\Blender\Backend:'
                 . ' Invalid blender_backend filter: Backend Foo not enabled',
                 []
             )
-            ->will($this->returnValue(null));
+            ->willReturn(null);
         $backend->setLogger($logger);
         $backend->search(new Query(), 0, 20, $params);
     }