only in patch2:
unchanged:
--- a/core/modules/block/src/Tests/BlockLanguageTest.php
+++ b/core/modules/block/src/Tests/BlockLanguageTest.php
@@ -124,6 +124,7 @@ public function testMultipleLanguageTypes() {
       'language_content[configurable]' => TRUE,
       'language_interface[enabled][language-url]' => FALSE,
       'language_interface[enabled][language-session]' => TRUE,
+      'language_content[enabled][language-url]' => TRUE,
     ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
@@ -166,8 +167,8 @@ public function testMultipleLanguageTypes() {
     // It will fall back on English (site default) and not display the block.
     $this->drupalGet('node', ['query' => ['language' => 'en']]);
     $this->assertNoText('Powered by Drupal', 'The body of the block does not appear on the page.');
-    $this->drupalGet('node', ['query' => ['language' => 'fr']]);
-    $this->assertNoText('Powered by Drupal', 'The body of the block does not appear on the page.');
+    $this->drupalGet('en/node', ['query' => ['language' => 'fr']]);
+    $this->assertText('Powered by Drupal', 'The body of the block does not appear on the page.');
 
     // Content language negotiation depends on path prefix.
     $this->drupalGet('en');