diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_0-supported.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_0-supported.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_0-supported.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_0-supported.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_0-unsupported.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_0-unsupported.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_0-unsupported.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_0-unsupported.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_0.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_0.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_0.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_1-alpha1.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_1-alpha1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_1-alpha1.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_1-alpha1.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_1-beta1.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_1-beta1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_1-beta1.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_1-beta1.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_1.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_1.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_1.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_2-alpha1.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_2-alpha1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_2-alpha1.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_2-alpha1.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_2-beta1.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_2-beta1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_2-beta1.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_2-beta1.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.1_2.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.1_2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.1_2.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.1_2.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.2_0-alpha1.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.2_0-alpha1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.2_0-alpha1.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.2_0-alpha1.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.2_0-beta1.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.2_0-beta1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.2_0-beta1.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.2_0-beta1.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.2_0.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.2_0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.2_0.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.2_0.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.8.x-1.2.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.8.x-1.2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.8.x-1.2.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.8.x-1.2.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.core_compatibility.8.x-1.2_8.x-2.2.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.core_compatibility.8.x-1.2_8.x-2.2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.core_compatibility.8.x-1.2_8.x-2.2.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.core_compatibility.8.x-1.2_8.x-2.2.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.no-releases.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.no-releases.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.no-releases.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.no-releases.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-1.1_8.x-1.2.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.sec.8.x-1.1_8.x-1.2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-1.1_8.x-1.2.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.sec.8.x-1.1_8.x-1.2.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-1.2.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.sec.8.x-1.2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-1.2.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.sec.8.x-1.2.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-1.2_8.x-2.2.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.sec.8.x-1.2_8.x-2.2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-1.2_8.x-2.2.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.sec.8.x-1.2_8.x-2.2.xml
diff --git a/core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-2.2_1.x_secure.xml b/core/modules/update/tests/fixtures/release-history/aaa_update_test.sec.8.x-2.2_1.x_secure.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-2.2_1.x_secure.xml
rename to core/modules/update/tests/fixtures/release-history/aaa_update_test.sec.8.x-2.2_1.x_secure.xml
diff --git a/core/modules/update/tests/modules/update_test/bbb_update_test.1_0.xml b/core/modules/update/tests/fixtures/release-history/bbb_update_test.1_0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/bbb_update_test.1_0.xml
rename to core/modules/update/tests/fixtures/release-history/bbb_update_test.1_0.xml
diff --git a/core/modules/update/tests/modules/update_test/bbb_update_test.1_1.xml b/core/modules/update/tests/fixtures/release-history/bbb_update_test.1_1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/bbb_update_test.1_1.xml
rename to core/modules/update/tests/fixtures/release-history/bbb_update_test.1_1.xml
diff --git a/core/modules/update/tests/modules/update_test/bbb_update_test.1_2.xml b/core/modules/update/tests/fixtures/release-history/bbb_update_test.1_2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/bbb_update_test.1_2.xml
rename to core/modules/update/tests/fixtures/release-history/bbb_update_test.1_2.xml
diff --git a/core/modules/update/tests/modules/update_test/ccc_update_test.1_0.xml b/core/modules/update/tests/fixtures/release-history/ccc_update_test.1_0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/ccc_update_test.1_0.xml
rename to core/modules/update/tests/fixtures/release-history/ccc_update_test.1_0.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.0.0-alpha1.xml b/core/modules/update/tests/fixtures/release-history/drupal.0.0-alpha1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.0.0-alpha1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.0.0-alpha1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.0.0-beta1.xml b/core/modules/update/tests/fixtures/release-history/drupal.0.0-beta1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.0.0-beta1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.0.0-beta1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.0.0.xml b/core/modules/update/tests/fixtures/release-history/drupal.0.0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.0.0.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.0.0.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.0.1-alpha1.xml b/core/modules/update/tests/fixtures/release-history/drupal.0.1-alpha1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.0.1-alpha1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.0.1-alpha1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.0.1-beta1.xml b/core/modules/update/tests/fixtures/release-history/drupal.0.1-beta1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.0.1-beta1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.0.1-beta1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.0.1.xml b/core/modules/update/tests/fixtures/release-history/drupal.0.1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.0.1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.0.1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.0-alpha1.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.0-alpha1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.0-alpha1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.0-alpha1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.0-beta1.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.0-beta1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.0-beta1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.0-beta1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.0-unsupported.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.0-unsupported.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.0-unsupported.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.0-unsupported.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.0.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.0.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.0.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.1-alpha1-core_compatibility.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.1-alpha1-core_compatibility.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.1-alpha1-core_compatibility.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.1-alpha1-core_compatibility.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.1-alpha1.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.1-alpha1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.1-alpha1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.1-alpha1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.1-beta1.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.1-beta1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.1-beta1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.1-beta1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.1-core_compatibility.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.1-core_compatibility.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.1-core_compatibility.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.1-core_compatibility.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.1.1.xml b/core/modules/update/tests/fixtures/release-history/drupal.1.1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.1.1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.1.1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.9.xml b/core/modules/update/tests/fixtures/release-history/drupal.9.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.9.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.9.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.dev.xml b/core/modules/update/tests/fixtures/release-history/drupal.dev.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.dev.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.dev.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.0.1_0.2.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.0.1_0.2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.0.1_0.2.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.0.1_0.2.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.0.2-rc2-b.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.0.2-rc2-b.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.0.2-rc2-b.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.0.2-rc2-b.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.0.2-rc2.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.0.2-rc2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.0.2-rc2.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.0.2-rc2.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.0.2.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.0.2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.0.2.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.0.2.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.1.2.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.1.2.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.1.2.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.1.2.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.1.2_insecure-unsupported.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.1.2_insecure-unsupported.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.1.2_insecure-unsupported.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.1.2_insecure-unsupported.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.1.2_insecure.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.1.2_insecure.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.1.2_insecure.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.1.2_insecure.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.2.0.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.2.0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.2.0.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.2.0.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.2.0_3.0-rc1.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.2.0_3.0-rc1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.2.0_3.0-rc1.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.2.0_3.0-rc1.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.2.0_9.0.0.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.2.0_9.0.0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.2.0_9.0.0.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.2.0_9.0.0.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.9.0.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.9.0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.9.0.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.9.0.xml
diff --git a/core/modules/update/tests/modules/update_test/drupal.sec.9.9.0.xml b/core/modules/update/tests/fixtures/release-history/drupal.sec.9.9.0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/drupal.sec.9.9.0.xml
rename to core/modules/update/tests/fixtures/release-history/drupal.sec.9.9.0.xml
diff --git a/core/modules/update/tests/modules/update_test/update_test_basetheme.1_1-sec.xml b/core/modules/update/tests/fixtures/release-history/update_test_basetheme.1_1-sec.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/update_test_basetheme.1_1-sec.xml
rename to core/modules/update/tests/fixtures/release-history/update_test_basetheme.1_1-sec.xml
diff --git a/core/modules/update/tests/modules/update_test/update_test_new_module.1_1.xml b/core/modules/update/tests/fixtures/release-history/update_test_new_module.1_1.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/update_test_new_module.1_1.xml
rename to core/modules/update/tests/fixtures/release-history/update_test_new_module.1_1.xml
diff --git a/core/modules/update/tests/modules/update_test/update_test_subtheme.1_0.xml b/core/modules/update/tests/fixtures/release-history/update_test_subtheme.1_0.xml
similarity index 100%
rename from core/modules/update/tests/modules/update_test/update_test_subtheme.1_0.xml
rename to core/modules/update/tests/fixtures/release-history/update_test_subtheme.1_0.xml
diff --git a/core/modules/update/tests/modules/update_test/src/Controller/UpdateTestController.php b/core/modules/update/tests/modules/update_test/src/Controller/UpdateTestController.php
index 184edd1..a8d15df 100644
--- a/core/modules/update/tests/modules/update_test/src/Controller/UpdateTestController.php
+++ b/core/modules/update/tests/modules/update_test/src/Controller/UpdateTestController.php
@@ -63,7 +63,7 @@ public function updateTest($project_name, $version) {
       $availability_scenario = '#broken#';
     }
 
-    $file = __DIR__ . "/../../$project_name.$availability_scenario.xml";
+    $file = __DIR__ . "/../../../../fixtures/release-history/$project_name.$availability_scenario.xml";
     $headers = ['Content-Type' => 'text/xml; charset=utf-8'];
     if (!is_file($file)) {
       // Return an empty response.