Return array not string.

tests/modules/integer_weight_test_views/integer_weight_test_views.info.yml

@@ -2,7 +2,7 @@ name: 'Integer weight test views'
 type: module
 description: 'Provides default views for integer weight views tests.'
 package: Testing
-core_version_requirement: ^9 || ^10
+core_version_requirement: ^8 || ^9 || ^10
 dependencies:
   - drupal:node
   - drupal:views

tests/src/Kernel/FedoraAdapterTest.php

@@ -235,7 +235,7 @@ class FedoraAdapterTest extends IslandoraKernelTestBase {
     $head_prophecy = $this->prophesize(Response::class);
     $head_prophecy->getStatusCode()->willReturn(410);
     $head_prophecy->getHeader('Link')
-      ->willReturn('<some-path-to-a-tombstone>; rel="hasTombstone"');
+      ->willReturn(['<some-path-to-a-tombstone>; rel="hasTombstone"']);
 
     $tombstone_prophecy = $this->prophesize(Response::class);
     $tombstone_prophecy->getStatusCode()->willReturn(204);
@@ -263,7 +263,7 @@ class FedoraAdapterTest extends IslandoraKernelTestBase {
     $head_prophecy = $this->prophesize(Response::class);
     $head_prophecy->getStatusCode()->willReturn(410);
     $head_prophecy->getHeader('Link')
-      ->willReturn('<some-path-to-a-tombstone>; rel="hasTombstone"');
+      ->willReturn(['<some-path-to-a-tombstone>; rel="hasTombstone"']);
 
     $tombstone_prophecy = $this->prophesize(Response::class);
     $tombstone_prophecy->getStatusCode()->willReturn(500);