diff --git a/Content/PageTreeArticleDataProvider.php b/Content/PageTreeArticleDataProvider.php
index 09ee53bd..6f631b2d 100644
--- a/Content/PageTreeArticleDataProvider.php
+++ b/Content/PageTreeArticleDataProvider.php
@@ -64,7 +64,7 @@ protected function createSearch(Search $search, array $filters, string $locale):
 
         if ($document instanceof BasePageDocument && $document->getResourceSegment()) {
             // the selected data-source could be removed
-            $search->addQuery(new PrefixQuery('route_path.raw', $document->getResourceSegment()));
+            $search->addQuery(new PrefixQuery('route_path.raw', $document->getResourceSegment() . '/'));
         }
 
         return $search;
diff --git a/Tests/Functional/Content/PageTreeArticleDataProviderTest.php b/Tests/Functional/Content/PageTreeArticleDataProviderTest.php
index 523a8d11..8de16897 100644
--- a/Tests/Functional/Content/PageTreeArticleDataProviderTest.php
+++ b/Tests/Functional/Content/PageTreeArticleDataProviderTest.php
@@ -51,7 +51,9 @@ public function setUp(): void
     public function testFilterByDataSource()
     {
         $page1 = $this->createPage('Test Page', '/page-1');
-        $page2 = $this->createPage('Test Page', '/page-2');
+
+        // Tests additionally that the trailing slash in the prefix query is there
+        $page2 = $this->createPage('Test Page', '/page-1-1');
 
         $articles = [
             $this->createArticle($page1, 'Test 1'),