diff --git a/page_manager_ui/css/page-manager-ui-page-variants.css b/page_manager_ui/css/page-manager-ui-page-variants.css
index 71d0d66279b10e72fcbf1d1a1e4b5ac71975856e..8da059397d5aed8e350d8bcad74f160bc2129a2f 100644
--- a/page_manager_ui/css/page-manager-ui-page-variants.css
+++ b/page_manager_ui/css/page-manager-ui-page-variants.css
@@ -17,12 +17,16 @@
   cursor: pointer;
   text-decoration: underline;
 }
-.page-manager-wizard-tree .page__section_item__1 > .page__section__label.active {
+.page-manager-wizard-tree
+  .page__section_item__1
+  > .page__section__label.active {
   font-weight: bold;
 }
-.page-manager-wizard-tree .page__section_item__1 > .page__section__label.current_variant:before {
-  content: '\00bb';
-  font-weight: bold;
+.page-manager-wizard-tree
+  .page__section_item__1
+  > .page__section__label.current_variant::before {
+  content: "\00bb";
   color: black;
   font-size: 18px;
+  font-weight: bold;
 }
diff --git a/page_manager_ui/css/page-manager-ui.admin.css b/page_manager_ui/css/page-manager-ui.admin.css
index 820be5a6d109fda906c2eb91227b8c0c3e82ee60..2cf4579100714d2262a57d71fecbb69aa4fe3a73 100644
--- a/page_manager_ui/css/page-manager-ui.admin.css
+++ b/page_manager_ui/css/page-manager-ui.admin.css
@@ -26,8 +26,8 @@
   border-left: 1px solid black;
 }
 .page-manager-wizard-actions ul.inline li {
+  padding: 0.5em;
   border-right: 1px solid black;
-  padding: .5em;
 }
 
 /**
@@ -42,41 +42,41 @@
   margin-left: 1em;
 }
 .page-manager-wizard-tree > ul {
-  border: 1px solid black;
-  padding-bottom: .5em;
   margin-bottom: 20px;
+  padding-bottom: 0.5em;
+  border: 1px solid black;
 }
 .page-manager-wizard-tree li {
-  border-bottom: 1px solid black;
-  padding: .5em;
+  padding: 0.5em;
   padding-right: 0;
+  border-bottom: 1px solid black;
 }
 .page-manager-wizard-tree li:last-child {
-  border-bottom: 0;
   padding-bottom: 0;
+  border-bottom: 0;
 }
 
 /**
  * The wizard form.
  */
 .page-manager-wizard-form {
-  border: 1px solid black;
-  padding: 1em;
   margin-bottom: 20px;
+  padding: 1em;
+  border: 1px solid black;
 }
 
 /* Wide screens */
-@media screen and (min-width: 780px), (orientation: landscape) and (min-device-height: 780px) {
-
+@media screen and (min-width: 780px),
+  (orientation: landscape) and (min-device-height: 780px) {
   /* Overall layout. */
   .page-manager-wizard-main {
     display: flex;
   }
   .page-manager-wizard-tree {
-    flex: .2;
+    flex: 0.2;
   }
   .page-manager-wizard-form {
-    flex: .8;
+    flex: 0.8;
   }
   .page-manager-wizard-form-actions {
     margin-left: 20%; /* LTR */
@@ -93,8 +93,8 @@
     float: right;
   }
   [dir="rtl"] .page-manager-wizard-form-actions {
-    margin-left: 0;
     margin-right: 20%;
+    margin-left: 0;
   }
   [dir="rtl"] .page-manager-wizard-tree > ul {
     border-right: 1px solid black;
diff --git a/page_manager_ui/src/Form/VariantPluginAddBlockForm.php b/page_manager_ui/src/Form/VariantPluginAddBlockForm.php
index bae19ff5c6f181c721692ea70f139d814df77e69..de3566e762d635c3276d54366a7460de064be9ad 100644
--- a/page_manager_ui/src/Form/VariantPluginAddBlockForm.php
+++ b/page_manager_ui/src/Form/VariantPluginAddBlockForm.php
@@ -62,7 +62,7 @@ class VariantPluginAddBlockForm extends VariantPluginConfigureBlockFormBase {
   /**
    * {@inheritdoc}
    */
-  public function buildForm(array $form, FormStateInterface $form_state, $block_display = NULL, $block_id = NULL, Request $request = NULL) {
+  public function buildForm(array $form, FormStateInterface $form_state, $block_display = NULL, $block_id = NULL, ?Request $request = NULL) {
     $form = parent::buildForm($form, $form_state, $block_display, $block_id);
     $form['region']['#default_value'] = $request->query->get('region');
     return $form;
diff --git a/src/Entity/PageVariantViewBuilder.php b/src/Entity/PageVariantViewBuilder.php
index 79fe928cc32ca0b9f90c5941d57d50dc32e8fc55..f123b83983cfafa852c897fab4412096895ccfa3 100644
--- a/src/Entity/PageVariantViewBuilder.php
+++ b/src/Entity/PageVariantViewBuilder.php
@@ -43,7 +43,7 @@ class PageVariantViewBuilder implements EntityViewBuilderInterface {
   /**
    * {@inheritdoc}
    */
-  public function resetCache(array $entities = NULL) {
+  public function resetCache(?array $entities = NULL) {
     // Intentionally empty.
   }
 
diff --git a/src/Plugin/SectionStorage/PageManagerSectionStorage.php b/src/Plugin/SectionStorage/PageManagerSectionStorage.php
index 9ad98e4be9275db045179c69eb091e885a587816..5e9c2e6fee297c05cfc9e038f6f8d7375d9e3144 100644
--- a/src/Plugin/SectionStorage/PageManagerSectionStorage.php
+++ b/src/Plugin/SectionStorage/PageManagerSectionStorage.php
@@ -203,7 +203,7 @@ class PageManagerSectionStorage extends SectionStorageBase implements ContainerF
   /**
    * {@inheritdoc}
    */
-  public function access($operation, AccountInterface $account = NULL, $return_as_object = FALSE) {
+  public function access($operation, ?AccountInterface $account = NULL, $return_as_object = FALSE) {
     $result = AccessResult::allowedIf($this->isLayoutBuilderEnabled())->addCacheableDependency($this);
     return $return_as_object ? $result : $result->isAllowed();
   }
diff --git a/tests/src/Unit/PageBlockDisplayVariantTest.php b/tests/src/Unit/PageBlockDisplayVariantTest.php
index 362dab6995ce765e1ea386ea7c79a24b5b847b9a..8f0ee38584ad797e10cd5620ff8fbb7274ac1693 100644
--- a/tests/src/Unit/PageBlockDisplayVariantTest.php
+++ b/tests/src/Unit/PageBlockDisplayVariantTest.php
@@ -151,8 +151,18 @@ class PageBlockDisplayVariantTest extends UnitTestCase {
     $condition_manager = $this->prophesize(ConditionManager::class);
 
     $variant_plugin = $this->getMockBuilder(PageBlockDisplayVariant::class)
-      // phpcs:ignore
-      ->setConstructorArgs([['page_title' => $page_title, 'uuid' => 'UUID'], 'test', [], $context_handler->reveal(), $account->reveal(), $uuid_generator->reveal(), $token, $block_manager->reveal(), $condition_manager->reveal(), $module_handler->reveal()])
+      ->setConstructorArgs([
+        ['page_title' => $page_title, 'uuid' => 'UUID'],
+        'test',
+        [],
+        $context_handler->reveal(),
+        $account->reveal(),
+        $uuid_generator->reveal(),
+        $token,
+        $block_manager->reveal(),
+        $condition_manager->reveal(),
+        $module_handler->reveal(),
+      ])
       ->onlyMethods(['renderPageTitle'])
       ->getMock();
 
diff --git a/tests/src/Unit/PageManagerRoutesTest.php b/tests/src/Unit/PageManagerRoutesTest.php
index 1e7291a3e10ab8ea885f54b07b5527c8b589c985..04740fd087d5a609e1d17260693dbd6a59c1375d 100644
--- a/tests/src/Unit/PageManagerRoutesTest.php
+++ b/tests/src/Unit/PageManagerRoutesTest.php
@@ -190,8 +190,15 @@ class PageManagerRoutesTest extends UnitTestCase {
 
     $collection = new RouteCollection();
     $collection->add("$route_name.POST", new Route($existing_route_path, ['default_exists' => 'default_value'], $requirements, ['parameters' => ['foo' => ['type' => 'bar']]], '', [], ['POST']));
-    // phpcs:ignore
-    $collection->add("$route_name.POST_with_format", new Route($existing_route_path, ['default_exists' => 'default_value'], $requirements + ['_format' => 'json'], ['parameters' => ['foo' => ['type' => 'bar']]], '', [], ['GET', 'POST']));
+    $collection->add("$route_name.POST_with_format", new Route(
+      $existing_route_path,
+      ['default_exists' => 'default_value'],
+      $requirements + ['_format' => 'json'],
+      ['parameters' => ['foo' => ['type' => 'bar']]],
+      '',
+      [],
+      ['GET', 'POST']
+    ));
     $collection->add($route_name, new Route($existing_route_path, ['default_exists' => 'default_value'], $requirements, ['parameters' => ['foo' => ['type' => 'bar']]]));
     $route_event = new RouteBuildEvent($collection);
     $this->routeSubscriber->onAlterRoutes($route_event);
@@ -372,8 +379,18 @@ class PageManagerRoutesTest extends UnitTestCase {
     $page->id()->willReturn('page1');
     $page->label()->willReturn(NULL);
     $page->usesAdminTheme()->willReturn(FALSE);
-    // phpcs:ignore
-    $page->getParameters()->willReturn(['foo' => ['machine_name' => 'foo', 'type' => 'integer', 'label' => 'Foo'], 'test_route' => ['machine_name' => 'test_route', 'type' => '', 'label' => '']]);
+    $page->getParameters()->willReturn([
+      'foo' => [
+        'machine_name' => 'foo',
+        'type' => 'integer',
+        'label' => 'Foo',
+      ],
+      'test_route' => [
+        'machine_name' => 'test_route',
+        'type' => '',
+        'label' => '',
+      ],
+    ]);
 
     $variant1 = $this->prophesize(PageVariantInterface::class);
     $variant1->getWeight()->willReturn(0);
diff --git a/tests/src/Unit/RouteAttributesTest.php b/tests/src/Unit/RouteAttributesTest.php
index ed99960046ba1b00350610b1e7deda1336100b81..b157053c5fff057110737020a4e6ed2eb3075397 100644
--- a/tests/src/Unit/RouteAttributesTest.php
+++ b/tests/src/Unit/RouteAttributesTest.php
@@ -31,8 +31,13 @@ class RouteAttributesTest extends UnitTestCase {
     $data['no-parameters'] = [new Route('/prefix/a'), 'a_route', '/prefix', []];
     $data['no-matching-parameters'] = [new Route('/prefix/{x}'), 'a_route', '/different-prefix/b', []];
     $data['matching-parameters'] = [new Route('/prefix/{x}'), 'a_route', '/prefix/b', ['x' => 'b']];
-    // phpcs:ignore
-    $data['with-defaults'] = [new Route('/prefix/{x}', ['foo' => 'bar']), 'a_route', '/different-prefix/b', ['foo' => 'bar']];
+    $data['with-defaults'] = [new Route(
+      '/prefix/{x}',
+      ['foo' => 'bar']),
+      'a_route',
+      '/different-prefix/b',
+      ['foo' => 'bar'],
+    ];
     return $data;
   }
 
diff --git a/tests/src/Unit/VariantRouteFilterTest.php b/tests/src/Unit/VariantRouteFilterTest.php
index 9ee6b90c141a093b86745561d6dacbfd78c6ecb9..1cd38793a0d62a8f239b29492a6591580e7eecad 100644
--- a/tests/src/Unit/VariantRouteFilterTest.php
+++ b/tests/src/Unit/VariantRouteFilterTest.php
@@ -203,10 +203,18 @@ class VariantRouteFilterTest extends UnitTestCase {
     $route_collection = new RouteCollection();
     $request = new Request();
 
-    // phpcs:ignore
-    $route1 = new Route('/path/with/{slug}', ['_page_manager_page_variant' => 'variant_1', '_page_manager_page_variant_weight' => 0]);
-    // phpcs:ignore
-    $route2 = new Route('/path/with/{slug}', ['_page_manager_page_variant' => 'variant_2', '_page_manager_page_variant_weight' => 2]);
+    $route1 = new Route(
+      '/path/with/{slug}',
+      [
+        '_page_manager_page_variant' => 'variant_1',
+        '_page_manager_page_variant_weight' => 0,
+      ]);
+    $route2 = new Route(
+      '/path/with/{slug}',
+      [
+        '_page_manager_page_variant' => 'variant_2',
+        '_page_manager_page_variant_weight' => 2,
+      ]);
     // Add route2 first to ensure that the routes get sorted by weight.
     $route_collection->add('route_2', $route2);
     $route_collection->add('route_1', $route1);
@@ -239,8 +247,12 @@ class VariantRouteFilterTest extends UnitTestCase {
     $route_collection = new RouteCollection();
     $request = new Request();
 
-    // phpcs:ignore
-    $route1 = new Route('/path/with/{slug}', ['_page_manager_page_variant' => 'variant_1', '_page_manager_page_variant_weight' => 1]);
+    $route1 = new Route(
+      '/path/with/{slug}',
+      [
+        '_page_manager_page_variant' => 'variant_1',
+        '_page_manager_page_variant_weight' => 1,
+      ]);
     $defaults = [
       '_page_manager_page_variant' => 'variant_2',
       '_page_manager_page_variant_weight' => 2,
@@ -291,8 +303,12 @@ class VariantRouteFilterTest extends UnitTestCase {
     ];
     $route1 = new Route('/path/with/{slug}');
     $route2 = new Route('/path/with/{slug}', $defaults);
-    // phpcs:ignore
-    $route3 = new Route('/path/with/{slug}', ['_page_manager_page_variant' => 'variant2', '_page_manager_page_variant_weight' => -1]);
+    $route3 = new Route(
+      '/path/with/{slug}',
+      [
+        '_page_manager_page_variant' => 'variant2',
+        '_page_manager_page_variant_weight' => -1,
+      ]);
     $route4 = new Route('/path/with/{slug}');
     // Add routes in different order to test sorting.
     $route_collection->add('route_3', $route3);
@@ -407,10 +423,20 @@ class VariantRouteFilterTest extends UnitTestCase {
     $request = new Request();
 
     // Add routes in different order to also test order preserving.
-    // phpcs:ignore
-    $route1 = new Route('/path/with/{slug}', ['_page_manager_page_variant' => 'variant1', '_page_manager_page_variant_weight' => -10, '_overridden_route_name' => 'preserved_route_name']);
-    // phpcs:ignore
-    $route2 = new Route('/path/with/{slug}', ['_page_manager_page_variant' => 'variant2', '_page_manager_page_variant_weight' => -5]);
+    $route1 = new Route(
+      '/path/with/{slug}',
+      [
+        '_page_manager_page_variant' => 'variant1',
+        '_page_manager_page_variant_weight' => -10,
+        '_overridden_route_name' => 'preserved_route_name',
+      ]);
+    $route2 = new Route(
+      '/path/with/{slug}',
+      [
+        '_page_manager_page_variant' => 'variant2',
+        '_page_manager_page_variant_weight' => -5,
+      ]
+    );
     $route3 = new Route('/path/with/{slug}', []);
     $route4 = new Route('/path/with/{slug}', []);
     $route_collection->add('route_4', $route4);