Issue #3483057 by mstrelan, bbrala, smustgrave: Add void return type to all hook_install and hook_uninstall implementations

38 files changed, 46 insertions, 310 deletions

diff --git a/core/.phpstan-baseline.php b/core/.phpstan-baseline.php
index c4baab20522..77874ce9a17 100644
--- a/core/.phpstan-baseline.php
+++ b/core/.phpstan-baseline.php
@@ -12534,12 +12534,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function block_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/block/block.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function block_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/block/block.install',
@@ -14394,24 +14388,12 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function comment_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/comment/comment.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function comment_schema\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/comment/comment.install',
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function comment_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/comment/comment.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function comment_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/comment/comment.install',
@@ -16764,12 +16746,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function contact_storage_test_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function contact_storage_test_contact_form_form_builder\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module',
@@ -17730,12 +17706,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function content_moderation_test_resave_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/content_moderation/tests/modules/content_moderation_test_resave/content_moderation_test_resave.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function content_moderation_test_resave_entity_insert\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/content_moderation/tests/modules/content_moderation_test_resave/content_moderation_test_resave.module',
@@ -18366,12 +18336,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function content_translation_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/content_translation/content_translation.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function content_translation_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/content_translation/content_translation.install',
@@ -21036,18 +21000,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function field_layout_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/field_layout/field_layout.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
-	'message' => '#^Function field_layout_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/field_layout/field_layout.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function field_layout_entity_type_alter\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/field_layout/field_layout.module',
@@ -23928,24 +23880,12 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function image_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/image/image.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function image_requirements\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/image/image.install',
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function image_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/image/image.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function image_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/image/image.install',
@@ -24744,12 +24684,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function jsonapi_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/jsonapi/jsonapi.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function jsonapi_requirements\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/jsonapi/jsonapi.install',
@@ -26790,12 +26724,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function layout_builder_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/layout_builder/layout_builder.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function layout_builder_schema\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/layout_builder/layout_builder.install',
@@ -28638,12 +28566,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function locale_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/locale/locale.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function locale_requirements\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/locale/locale.install',
@@ -28656,12 +28578,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function locale_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/locale/locale.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function locale_update_10300\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/locale/locale.install',
@@ -29346,12 +29262,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function locale_test_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/locale/tests/modules/locale_test/locale_test.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function locale_test_countries_alter\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/locale/tests/modules/locale_test/locale_test.module',
@@ -29652,12 +29562,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function media_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/media/media.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function media_requirements\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/media/media.install',
@@ -30732,12 +30636,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function media_library_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/media_library/media_library.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function media_library_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/media_library/media_library.install',
@@ -33638,12 +33536,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function migrate_drupal_ui_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/migrate_drupal_ui/migrate_drupal_ui.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function migrate_drupal_ui_help\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/migrate_drupal_ui/migrate_drupal_ui.module',
@@ -34406,12 +34298,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function node_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/node/node.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function node_requirements\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/node/node.install',
@@ -34424,12 +34310,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function node_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/node/node.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function node_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/node/node.install',
@@ -39146,12 +39026,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function settings_tray_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/settings_tray/settings_tray.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function settings_tray_block_alter\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/settings_tray/settings_tray.module',
@@ -39308,24 +39182,12 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function shortcut_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/shortcut/shortcut.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function shortcut_schema\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/shortcut/shortcut.install',
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function shortcut_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/shortcut/shortcut.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function shortcut_help\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/shortcut/shortcut.module',
@@ -39920,12 +39782,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function syslog_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/syslog/syslog.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function syslog_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/syslog/syslog.install',
@@ -40754,12 +40610,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function system_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/system.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function system_requirements\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/system/system.install',
@@ -42430,12 +42280,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function entity_test_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/tests/modules/entity_test/entity_test.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function entity_test_schema\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/system/tests/modules/entity_test/entity_test.install',
@@ -44440,12 +44284,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function hold_test_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/tests/modules/hold_test/hold_test.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function hold_test_request\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/system/tests/modules/hold_test/hold_test.module',
@@ -44739,18 +44577,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function module_handler_test_multiple_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
-	'message' => '#^Function module_handler_test_multiple_child_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple_child/module_handler_test_multiple_child.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function module_required_test_system_info_alter\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/system/tests/modules/module_required_test/module_required_test.module',
@@ -44769,12 +44595,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function module_test_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/tests/modules/module_test/module_test.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function module_test_schema\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/system/tests/modules/module_test/module_test.install',
@@ -45203,12 +45023,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function router_test_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/tests/modules/router_test_directory/router_test.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function router_test_preprocess_page\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/system/tests/modules/router_test_directory/router_test.module',
@@ -45467,12 +45281,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function system_module_test_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/tests/modules/system_module_test/system_module_test.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function system_module_test_page_attachments_alter\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/system/tests/modules/system_module_test/system_module_test.module',
@@ -45647,12 +45455,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function test_batch_test_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/system/tests/modules/test_batch_test/test_batch_test.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Method Drupal\\\\test_page_test\\\\Controller\\\\Test\\:\\:deprecations\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/system/tests/modules/test_page_test/src/Controller/Test.php',
@@ -50243,24 +50045,12 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function update_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/update/update.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function update_requirements\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/update/update.install',
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function update_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/update/update.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function update_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/update/update.install',
@@ -52019,12 +51809,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function user_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/user/user.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function user_schema\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/user/user.install',
@@ -59117,12 +58901,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function views_test_data_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/views/tests/modules/views_test_data/views_test_data.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function views_test_data_schema\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/views/tests/modules/views_test_data/views_test_data.install',
@@ -60617,12 +60395,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function views_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/views/views.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function views_update_last_removed\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/views/views.install',
@@ -63839,12 +63611,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function workspaces_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/modules/workspaces/workspaces.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function workspaces_module_preinstall\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/modules/workspaces/workspaces.install',
@@ -63989,12 +63755,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function demo_umami_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/profiles/demo_umami/demo_umami.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function demo_umami_requirements\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/profiles/demo_umami/demo_umami.install',
@@ -64031,24 +63791,12 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function demo_umami_content_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/profiles/demo_umami/modules/demo_umami_content/demo_umami_content.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function demo_umami_content_module_preinstall\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/profiles/demo_umami/modules/demo_umami_content/demo_umami_content.install',
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function demo_umami_content_uninstall\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/profiles/demo_umami/modules/demo_umami_content/demo_umami_content.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Method Drupal\\\\demo_umami_content\\\\InstallHelper\\:\\:create\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/profiles/demo_umami/modules/demo_umami_content/src/InstallHelper.php',
@@ -64253,12 +64001,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function standard_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/profiles/standard/standard.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function standard_form_install_configure_form_alter\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/profiles/standard/standard.profile',
@@ -64331,12 +64073,6 @@ $ignoreErrors[] = [
 ];
 $ignoreErrors[] = [
 	// identifier: missingType.return
-	'message' => '#^Function testing_site_config_install\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/profiles/testing_site_config/testing_site_config.install',
-];
-$ignoreErrors[] = [
-	// identifier: missingType.return
 	'message' => '#^Function simpletest_script_execute_batch\\(\\) has no return type specified\\.$#',
 	'count' => 1,
 	'path' => __DIR__ . '/scripts/run-tests.sh',
diff --git a/core/lib/Drupal/Core/Extension/module.api.php b/core/lib/Drupal/Core/Extension/module.api.php
index abc3025a9bf..bfe5f5f62ba 100644
--- a/core/lib/Drupal/Core/Extension/module.api.php
+++ b/core/lib/Drupal/Core/Extension/module.api.php
@@ -255,7 +255,7 @@ function hook_modules_installed($modules, $is_syncing) {
  * @see hook_uninstall()
  * @see hook_modules_installed()
  */
-function hook_install($is_syncing) {
+function hook_install($is_syncing): void {
   // Set general module variables.
   \Drupal::state()->set('my_module.foo', 'bar');
 }
@@ -345,7 +345,7 @@ function hook_modules_uninstalled($modules, $is_syncing) {
  * @see hook_modules_uninstalled()
  * @see \Drupal\Core\Extension\ModuleUninstallValidatorInterface
  */
-function hook_uninstall($is_syncing) {
+function hook_uninstall($is_syncing): void {
   // Delete remaining general module variables.
   \Drupal::state()->delete('my_module.foo');
 }
diff --git a/core/modules/block/block.install b/core/modules/block/block.install
index 0a2717dabf3..0d2e66503fe 100644
--- a/core/modules/block/block.install
+++ b/core/modules/block/block.install
@@ -10,7 +10,7 @@ use Drupal\Core\Cache\Cache;
 /**
  * Implements hook_install().
  */
-function block_install() {
+function block_install(): void {
   // Because the Block module upon installation unconditionally overrides all
   // HTML output by selecting a different page display variant, we must
   // invalidate all cached HTML output.
diff --git a/core/modules/comment/comment.install b/core/modules/comment/comment.install
index 53a0c61d599..107b5a8f133 100644
--- a/core/modules/comment/comment.install
+++ b/core/modules/comment/comment.install
@@ -11,7 +11,7 @@ use Drupal\field\Entity\FieldStorageConfig;
 /**
  * Implements hook_uninstall().
  */
-function comment_uninstall() {
+function comment_uninstall(): void {
   // Remove the comment fields.
   $storage = \Drupal::entityTypeManager()->getStorage('field_storage_config');
   $fields = $storage->loadByProperties(['type' => 'comment']);
@@ -24,7 +24,7 @@ function comment_uninstall() {
 /**
  * Implements hook_install().
  */
-function comment_install() {
+function comment_install(): void {
   // By default, maintain entity statistics for comments.
   // @see \Drupal\comment\CommentStatisticsInterface
   \Drupal::state()->set('comment.maintain_entity_statistics', TRUE);
diff --git a/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install b/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install
index 1ccb97b58ad..708bbafcd62 100644
--- a/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install
+++ b/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install
@@ -12,7 +12,7 @@ use Drupal\Core\Entity\Sql\SqlContentEntityStorage;
 /**
  * Implements hook_install().
  */
-function contact_storage_test_install() {
+function contact_storage_test_install(): void {
   $entity_definition_update_manager = \Drupal::entityDefinitionUpdateManager();
 
   $original = $entity_definition_update_manager->getEntityType('contact_message');
diff --git a/core/modules/content_moderation/tests/modules/content_moderation_test_resave/content_moderation_test_resave.install b/core/modules/content_moderation/tests/modules/content_moderation_test_resave/content_moderation_test_resave.install
index aad9057f446..8682af1f763 100644
--- a/core/modules/content_moderation/tests/modules/content_moderation_test_resave/content_moderation_test_resave.install
+++ b/core/modules/content_moderation/tests/modules/content_moderation_test_resave/content_moderation_test_resave.install
@@ -10,7 +10,7 @@ declare(strict_types=1);
 /**
  * Implements hook_install().
  */
-function content_moderation_test_resave_install() {
+function content_moderation_test_resave_install(): void {
   // Make sure that this module's hooks are run before Content Moderation's
   // hooks.
   module_set_weight('content_moderation_test_resave', -10);
diff --git a/core/modules/content_translation/content_translation.install b/core/modules/content_translation/content_translation.install
index ba67d2141eb..85571166885 100644
--- a/core/modules/content_translation/content_translation.install
+++ b/core/modules/content_translation/content_translation.install
@@ -11,7 +11,7 @@ use Drupal\Core\Url;
 /**
  * Implements hook_install().
  */
-function content_translation_install() {
+function content_translation_install(): void {
   // Assign a fairly low weight to ensure our implementation of
   // hook_module_implements_alter() is run among the last ones.
   module_set_weight('content_translation', 10);
diff --git a/core/modules/field_layout/field_layout.install b/core/modules/field_layout/field_layout.install
index 88882d39289..15c47ef968e 100644
--- a/core/modules/field_layout/field_layout.install
+++ b/core/modules/field_layout/field_layout.install
@@ -14,7 +14,7 @@ use Drupal\field_layout\Display\EntityDisplayWithLayoutInterface;
 /**
  * Implements hook_install().
  */
-function field_layout_install() {
+function field_layout_install(): void {
   // Ensure each entity display has a layout.
   $entity_save = function (EntityDisplayInterface $entity) {
     if ($entity instanceof EntityDisplayWithLayoutInterface) {
@@ -31,7 +31,7 @@ function field_layout_install() {
 /**
  * Implements hook_uninstall().
  */
-function field_layout_uninstall() {
+function field_layout_uninstall(): void {
   // Reset each entity display to use the one-column layout to best approximate
   // the absence of layouts.
   $entity_save = function (EntityDisplayInterface $entity) {
diff --git a/core/modules/image/image.install b/core/modules/image/image.install
index a7e5d2fa58e..f4170dc6bc2 100644
--- a/core/modules/image/image.install
+++ b/core/modules/image/image.install
@@ -11,7 +11,7 @@ use Drupal\Core\File\FileSystemInterface;
 /**
  * Implements hook_install().
  */
-function image_install() {
+function image_install(): void {
   // Create the styles directory and ensure it's writable.
   $directory = \Drupal::config('system.file')->get('default_scheme') . '://styles';
   \Drupal::service('file_system')->prepareDirectory($directory, FileSystemInterface::CREATE_DIRECTORY | FileSystemInterface::MODIFY_PERMISSIONS);
@@ -20,7 +20,7 @@ function image_install() {
 /**
  * Implements hook_uninstall().
  */
-function image_uninstall() {
+function image_uninstall(): void {
   // Remove the styles directory and generated images.
   /** @var \Drupal\Core\File\FileSystemInterface $file_system */
   $file_system = \Drupal::service('file_system');
diff --git a/core/modules/jsonapi/jsonapi.install b/core/modules/jsonapi/jsonapi.install
index 48c0ed89aea..3cc0ee0a821 100644
--- a/core/modules/jsonapi/jsonapi.install
+++ b/core/modules/jsonapi/jsonapi.install
@@ -10,7 +10,7 @@ use Drupal\Core\Url;
 /**
  * Implements hook_install().
  */
-function jsonapi_install() {
+function jsonapi_install(): void {
   $module_handler = \Drupal::moduleHandler();
   $potential_conflicts = [
     'content_translation',
diff --git a/core/modules/layout_builder/layout_builder.install b/core/modules/layout_builder/layout_builder.install
index 18df64a2fbd..2629b72c096 100644
--- a/core/modules/layout_builder/layout_builder.install
+++ b/core/modules/layout_builder/layout_builder.install
@@ -13,7 +13,7 @@ use Drupal\layout_builder\Section;
 /**
  * Implements hook_install().
  */
-function layout_builder_install() {
+function layout_builder_install(): void {
   $display_changed = FALSE;
 
   $displays = LayoutBuilderEntityViewDisplay::loadMultiple();
diff --git a/core/modules/locale/locale.install b/core/modules/locale/locale.install
index 0b204f7103d..97422682472 100644
--- a/core/modules/locale/locale.install
+++ b/core/modules/locale/locale.install
@@ -13,7 +13,7 @@ use Drupal\Core\Url;
 /**
  * Implements hook_install().
  */
-function locale_install() {
+function locale_install(): void {
   // Create the interface translations directory and ensure it's writable.
   if (!$directory = \Drupal::config('locale.settings')->get('translation.path')) {
     $site_path = \Drupal::getContainer()->getParameter('site.path');
@@ -32,7 +32,7 @@ function locale_install() {
 /**
  * Implements hook_uninstall().
  */
-function locale_uninstall() {
+function locale_uninstall(): void {
   $config = \Drupal::config('locale.settings');
   // Delete all JavaScript translation files.
   $locale_js_directory = 'public://' . $config->get('javascript.directory');
diff --git a/core/modules/locale/tests/modules/locale_test/locale_test.install b/core/modules/locale/tests/modules/locale_test/locale_test.install
index d3045ec8a58..745771f22b4 100644
--- a/core/modules/locale/tests/modules/locale_test/locale_test.install
+++ b/core/modules/locale/tests/modules/locale_test/locale_test.install
@@ -10,7 +10,7 @@ declare(strict_types=1);
 /**
  * Implements hook_uninstall().
  */
-function locale_test_uninstall() {
+function locale_test_uninstall(): void {
   // Clear variables.
   \Drupal::state()->delete('locale.test_system_info_alter');
   \Drupal::state()->delete('locale.test_projects_alter');
diff --git a/core/modules/media/media.install b/core/modules/media/media.install
index ec43e36cb36..b901db70ebe 100644
--- a/core/modules/media/media.install
+++ b/core/modules/media/media.install
@@ -19,7 +19,7 @@ use Drupal\user\RoleInterface;
 /**
  * Implements hook_install().
  */
-function media_install() {
+function media_install(): void {
   $source = \Drupal::service('extension.list.module')->getPath('media') . '/images/icons';
   $destination = \Drupal::config('media.settings')->get('icon_base_uri');
   /** @var \Drupal\Core\File\FileSystemInterface $file_system */
diff --git a/core/modules/media_library/media_library.install b/core/modules/media_library/media_library.install
index c03aa041ef4..92dbf65385e 100644
--- a/core/modules/media_library/media_library.install
+++ b/core/modules/media_library/media_library.install
@@ -10,7 +10,7 @@ use Drupal\media\Entity\MediaType;
 /**
  * Implements hook_install().
  */
-function media_library_install($is_syncing) {
+function media_library_install($is_syncing): void {
   if (!$is_syncing) {
     foreach (MediaType::loadMultiple() as $type) {
       _media_library_configure_form_display($type);
diff --git a/core/modules/migrate_drupal_ui/migrate_drupal_ui.install b/core/modules/migrate_drupal_ui/migrate_drupal_ui.install
index 5962ee1f878..e993c64205d 100644
--- a/core/modules/migrate_drupal_ui/migrate_drupal_ui.install
+++ b/core/modules/migrate_drupal_ui/migrate_drupal_ui.install
@@ -10,7 +10,7 @@ use Drupal\Core\Url;
 /**
  * Implements hook_install().
  */
-function migrate_drupal_ui_install() {
+function migrate_drupal_ui_install(): void {
   $url = Url::fromRoute('migrate_drupal_ui.upgrade')->toString();
   \Drupal::messenger()->addStatus(t('The Migrate Drupal UI module has been enabled. Proceed to the <a href=":url">upgrade form</a>.', [':url' => $url]));
 }
diff --git a/core/modules/node/node.install b/core/modules/node/node.install
index 154ae4d9ded..85a3794b698 100644
--- a/core/modules/node/node.install
+++ b/core/modules/node/node.install
@@ -120,7 +120,7 @@ function node_schema() {
 /**
  * Implements hook_install().
  */
-function node_install() {
+function node_install(): void {
   // Enable default permissions for system roles.
   // IMPORTANT: Modules SHOULD NOT automatically grant any user role access
   // permissions in hook_install().
@@ -149,7 +149,7 @@ function node_install() {
 /**
  * Implements hook_uninstall().
  */
-function node_uninstall() {
+function node_uninstall(): void {
   // Delete remaining general module variables.
   \Drupal::state()->delete('node.node_access_needs_rebuild');
 }
diff --git a/core/modules/settings_tray/settings_tray.install b/core/modules/settings_tray/settings_tray.install
index c1d43355c99..3aeabf00e6b 100644
--- a/core/modules/settings_tray/settings_tray.install
+++ b/core/modules/settings_tray/settings_tray.install
@@ -8,7 +8,7 @@
 /**
  * Implements hook_install().
  */
-function settings_tray_install() {
+function settings_tray_install(): void {
   // \Drupal\Core\Menu\ContextualLinkManager caches per-group definitions
   // without associating the cache tag that would allow them to be cleared
   // by its clearCachedDefinitions() implementation that is automatically
diff --git a/core/modules/shortcut/shortcut.install b/core/modules/shortcut/shortcut.install
index bb61278a54a..5f1dd604c35 100644
--- a/core/modules/shortcut/shortcut.install
+++ b/core/modules/shortcut/shortcut.install
@@ -49,7 +49,7 @@ function shortcut_schema() {
 /**
  * Implements hook_install().
  */
-function shortcut_install() {
+function shortcut_install(): void {
   // Theme settings are not configuration entities and cannot depend on modules
   // so to set a module-specific setting, we need to set it with logic.
   if (\Drupal::service('theme_handler')->themeExists('claro')) {
@@ -63,7 +63,7 @@ function shortcut_install() {
 /**
  * Implements hook_uninstall().
  */
-function shortcut_uninstall() {
+function shortcut_uninstall(): void {
   // Theme settings are not configuration entities and cannot depend on modules
   // so to unset a module-specific setting, we need to unset it with logic.
   if (\Drupal::service('theme_handler')->themeExists('claro')) {
diff --git a/core/modules/syslog/syslog.install b/core/modules/syslog/syslog.install
index 2219bd507f2..6661887324e 100644
--- a/core/modules/syslog/syslog.install
+++ b/core/modules/syslog/syslog.install
@@ -8,7 +8,7 @@
 /**
  * Implements hook_install().
  */
-function syslog_install() {
+function syslog_install(): void {
   // The default facility setting depends on the operating system, so it needs
   // to be set dynamically during installation.
   \Drupal::configFactory()->getEditable('syslog.settings')->set('facility', defined('LOG_LOCAL0') ? LOG_LOCAL0 : LOG_USER)->save();
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 85324051c18..b903e574b5a 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -1618,7 +1618,7 @@ function system_requirements($phase) {
 /**
  * Implements hook_install().
  */
-function system_install() {
+function system_install(): void {
   // Populate the cron key state variable.
   $cron_key = Crypt::randomBytesBase64(55);
   \Drupal::state()->set('system.cron_key', $cron_key);
diff --git a/core/modules/system/tests/modules/entity_test/entity_test.install b/core/modules/system/tests/modules/entity_test/entity_test.install
index 7527384356f..667b630fc9c 100644
--- a/core/modules/system/tests/modules/entity_test/entity_test.install
+++ b/core/modules/system/tests/modules/entity_test/entity_test.install
@@ -13,7 +13,7 @@ use Drupal\field\Entity\FieldConfig;
 /**
  * Implements hook_install().
  */
-function entity_test_install() {
+function entity_test_install(): void {
   foreach (entity_test_entity_types() as $entity_type) {
     // Auto-create fields for testing.
     FieldStorageConfig::create([
diff --git a/core/modules/system/tests/modules/hold_test/hold_test.install b/core/modules/system/tests/modules/hold_test/hold_test.install
index cc7d9045e75..64ef37da270 100644
--- a/core/modules/system/tests/modules/hold_test/hold_test.install
+++ b/core/modules/system/tests/modules/hold_test/hold_test.install
@@ -10,7 +10,7 @@ declare(strict_types=1);
 /**
  * Implements hook_install().
  */
-function hold_test_install() {
+function hold_test_install(): void {
   hold_test_request(FALSE);
   hold_test_response(FALSE);
 }
diff --git a/core/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple.install b/core/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple.install
index f188d069859..c78001b255a 100644
--- a/core/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple.install
+++ b/core/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple.install
@@ -10,7 +10,7 @@ declare(strict_types=1);
 /**
  * Implements hook_install().
  */
-function module_handler_test_multiple_install() {
+function module_handler_test_multiple_install(): void {
   // Set weight of module.
   module_set_weight('module_handler_test_multiple', 1);
 }
diff --git a/core/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple_child/module_handler_test_multiple_child.install b/core/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple_child/module_handler_test_multiple_child.install
index 01e22777100..a264dba00ef 100644
--- a/core/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple_child/module_handler_test_multiple_child.install
+++ b/core/modules/system/tests/modules/module_handler_test_multiple/module_handler_test_multiple_child/module_handler_test_multiple_child.install
@@ -13,7 +13,7 @@ declare(strict_types=1);
 /**
  * Implements hook_install().
  */
-function module_handler_test_multiple_child_install() {
+function module_handler_test_multiple_child_install(): void {
   // Set weight of module.
   module_set_weight('module_handler_test_multiple_child', 1);
 }
diff --git a/core/modules/system/tests/modules/module_test/module_test.install b/core/modules/system/tests/modules/module_test/module_test.install
index 42ea0c45105..7c3638e88d9 100644
--- a/core/modules/system/tests/modules/module_test/module_test.install
+++ b/core/modules/system/tests/modules/module_test/module_test.install
@@ -31,7 +31,7 @@ function module_test_schema() {
 /**
  * Implements hook_install().
  */
-function module_test_install() {
+function module_test_install(): void {
   $schema = module_test_schema()['module_test'];
   Database::getConnection()->insert('module_test')
     ->fields([
diff --git a/core/modules/system/tests/modules/router_test_directory/router_test.install b/core/modules/system/tests/modules/router_test_directory/router_test.install
index 92fb50df8c3..c87947bea13 100644
--- a/core/modules/system/tests/modules/router_test_directory/router_test.install
+++ b/core/modules/system/tests/modules/router_test_directory/router_test.install
@@ -12,7 +12,7 @@ use Drupal\Core\Url;
 /**
  * Implements hook_install().
  */
-function router_test_install() {
+function router_test_install(): void {
   // Ensure a URL can be generated for routes provided by the module during
   // installation.
   \Drupal::state()->set(__FUNCTION__, Url::fromRoute('router_test.1')->toString());
diff --git a/core/modules/system/tests/modules/system_module_test/system_module_test.install b/core/modules/system/tests/modules/system_module_test/system_module_test.install
index 931488918a5..63aafddae4f 100644
--- a/core/modules/system/tests/modules/system_module_test/system_module_test.install
+++ b/core/modules/system/tests/modules/system_module_test/system_module_test.install
@@ -12,6 +12,6 @@ use Drupal\Core\Cache\Cache;
 /**
  * Implements hook_install().
  */
-function system_module_test_install() {
+function system_module_test_install(): void {
   Cache::invalidateTags(['rendered']);
 }
diff --git a/core/modules/system/tests/modules/test_batch_test/test_batch_test.install b/core/modules/system/tests/modules/test_batch_test/test_batch_test.install
index ccd805c1aae..4ddd787d15c 100644
--- a/core/modules/system/tests/modules/test_batch_test/test_batch_test.install
+++ b/core/modules/system/tests/modules/test_batch_test/test_batch_test.install
@@ -12,7 +12,7 @@ use Drupal\entity_test\Entity\EntityTest;
 /**
  * Implements hook_install().
  */
-function test_batch_test_install() {
+function test_batch_test_install(): void {
   $total = 2;
   $operations = [];
   for ($i = 1; $i <= $total; $i++) {
diff --git a/core/modules/update/update.install b/core/modules/update/update.install
index d7a95d60013..3fb6136ab70 100644
--- a/core/modules/update/update.install
+++ b/core/modules/update/update.install
@@ -73,7 +73,7 @@ function update_requirements($phase) {
 /**
  * Implements hook_install().
  */
-function update_install() {
+function update_install(): void {
   $queue = \Drupal::queue('update_fetch_tasks', TRUE);
   $queue->createQueue();
 }
@@ -81,7 +81,7 @@ function update_install() {
 /**
  * Implements hook_uninstall().
  */
-function update_uninstall() {
+function update_uninstall(): void {
   \Drupal::state()->delete('update.last_check');
   \Drupal::state()->delete('update.last_email_notification');
 
diff --git a/core/modules/user/user.install b/core/modules/user/user.install
index eb96432eef4..0475c47d375 100644
--- a/core/modules/user/user.install
+++ b/core/modules/user/user.install
@@ -68,7 +68,7 @@ function user_schema() {
 /**
  * Implements hook_install().
  */
-function user_install() {
+function user_install(): void {
   $storage = \Drupal::entityTypeManager()->getStorage('user');
   // Insert a row for the anonymous user.
   $storage
diff --git a/core/modules/views/tests/modules/views_test_data/views_test_data.install b/core/modules/views/tests/modules/views_test_data/views_test_data.install
index 0b2df3e2511..97535ef92ec 100644
--- a/core/modules/views/tests/modules/views_test_data/views_test_data.install
+++ b/core/modules/views/tests/modules/views_test_data/views_test_data.install
@@ -17,7 +17,7 @@ function views_test_data_schema() {
 /**
  * Implements hook_install().
  */
-function views_test_data_install() {
+function views_test_data_install(): void {
   // Add the marquee tag to possible html elements to test the field handler.
   $values = [
     'div' => 'DIV',
diff --git a/core/modules/views/views.install b/core/modules/views/views.install
index a7ed0b99a85..cef5efae59f 100644
--- a/core/modules/views/views.install
+++ b/core/modules/views/views.install
@@ -8,7 +8,7 @@
 /**
  * Implements hook_install().
  */
-function views_install() {
+function views_install(): void {
   module_set_weight('views', 10);
 }
 
diff --git a/core/modules/workspaces/workspaces.install b/core/modules/workspaces/workspaces.install
index 0223678a686..96f45aad5ba 100644
--- a/core/modules/workspaces/workspaces.install
+++ b/core/modules/workspaces/workspaces.install
@@ -49,7 +49,7 @@ function workspaces_module_preinstall($module) {
 /**
  * Implements hook_install().
  */
-function workspaces_install() {
+function workspaces_install(): void {
   // Set the owner of these default workspaces to be first user which has the
   // 'administrator' role. This way we avoid hard coding user ID 1 for sites
   // that prefer to not give it any special meaning.
diff --git a/core/profiles/demo_umami/demo_umami.install b/core/profiles/demo_umami/demo_umami.install
index 5404f934a2d..1e305aec723 100644
--- a/core/profiles/demo_umami/demo_umami.install
+++ b/core/profiles/demo_umami/demo_umami.install
@@ -32,7 +32,7 @@ function demo_umami_requirements($phase) {
  *
  * @see system_install()
  */
-function demo_umami_install() {
+function demo_umami_install(): void {
   // We install some menu links, so we have to rebuild the router, to ensure the
   // menu links are valid.
   \Drupal::service('router.builder')->rebuildIfNeeded();
diff --git a/core/profiles/demo_umami/modules/demo_umami_content/demo_umami_content.install b/core/profiles/demo_umami/modules/demo_umami_content/demo_umami_content.install
index f3df9bfc6e1..3a0a986c4be 100644
--- a/core/profiles/demo_umami/modules/demo_umami_content/demo_umami_content.install
+++ b/core/profiles/demo_umami/modules/demo_umami_content/demo_umami_content.install
@@ -21,7 +21,7 @@ function demo_umami_content_module_preinstall($module) {
 /**
  * Implements hook_install().
  */
-function demo_umami_content_install($is_syncing) {
+function demo_umami_content_install($is_syncing): void {
   if (!$is_syncing) {
     $query = \Drupal::entityQuery('node')->accessCheck(TRUE);
     $nids = $query->execute();
@@ -74,7 +74,7 @@ function demo_umami_content_install($is_syncing) {
 /**
  * Implements hook_uninstall().
  */
-function demo_umami_content_uninstall($is_syncing) {
+function demo_umami_content_uninstall($is_syncing): void {
   if (!$is_syncing) {
     \Drupal::classResolver(InstallHelper::class)->deleteImportedContent();
   }
diff --git a/core/profiles/standard/standard.install b/core/profiles/standard/standard.install
index 6fda4647f17..635f2c2b774 100644
--- a/core/profiles/standard/standard.install
+++ b/core/profiles/standard/standard.install
@@ -14,7 +14,7 @@ use Drupal\shortcut\Entity\Shortcut;
  *
  * @see system_install()
  */
-function standard_install() {
+function standard_install(): void {
   // Populate the default shortcut set.
   $shortcut = Shortcut::create([
     'shortcut_set' => 'default',
diff --git a/core/profiles/testing_site_config/testing_site_config.install b/core/profiles/testing_site_config/testing_site_config.install
index 0f718d0b8f4..548ff02b40d 100644
--- a/core/profiles/testing_site_config/testing_site_config.install
+++ b/core/profiles/testing_site_config/testing_site_config.install
@@ -8,7 +8,7 @@
 /**
  * Implements hook_install().
  */
-function testing_site_config_install() {
+function testing_site_config_install(): void {
   // Set the site email address to something that is not sendmail_from.
   \Drupal::configFactory()->getEditable('system.site')
     ->set('mail', 'profile-testing-site-config@example.com')