diff --git a/core/modules/system/tests/modules/olivero_test/config/install/comment.type.comment.yml b/core/modules/system/tests/modules/olivero_test/config/install/comment.type.comment.yml
deleted file mode 100644
index ddcbbc986095a6bfd062679f0990d011b956db97..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/comment.type.comment.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-langcode: en
-status: true
-dependencies: {  }
-id: comment
-label: 'Default comments'
-target_entity_type_id: node
-description: 'Allows commenting on content'
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/contact.form.olivero_test_contact_form.yml b/core/modules/system/tests/modules/olivero_test/config/install/contact.form.olivero_test_contact_form.yml
deleted file mode 100644
index 5b12a0d6a9f24945ac4970f262990b69cc11a852..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/contact.form.olivero_test_contact_form.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-langcode: en
-status: true
-dependencies: {  }
-id: olivero_test_contact_form
-label: 'Olivero Test Contact Form'
-recipients:
-  - webmaster@example.com
-reply: ''
-weight: 0
-message: ''
-redirect: ''
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.comment.comment.default.yml b/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.comment.comment.default.yml
deleted file mode 100644
index 1010be292488569234b654548ba3234bf8d9ae1e..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.comment.comment.default.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - comment.type.comment
-    - field.field.comment.comment.comment_body
-  module:
-    - text
-id: comment.comment.default
-targetEntityType: comment
-bundle: comment
-mode: default
-content:
-  author:
-    weight: -2
-    region: content
-  comment_body:
-    type: text_textarea
-    weight: 11
-    region: content
-    settings:
-      rows: 5
-      placeholder: ''
-    third_party_settings: {  }
-  subject:
-    type: string_textfield
-    weight: 10
-    region: content
-    settings:
-      size: 60
-      placeholder: ''
-    third_party_settings: {  }
-hidden: {  }
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.contact_message.olivero_test_contact_form.default.yml b/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.contact_message.olivero_test_contact_form.default.yml
deleted file mode 100644
index 94ea7ba27532f2f4f3d4e22c1545b355888cb0d4..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.contact_message.olivero_test_contact_form.default.yml
+++ /dev/null
@@ -1,56 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - contact.form.olivero_test_contact_form
-    - field.field.contact_message.olivero_test_contact_form.field_multiple_value_form_field
-id: contact_message.olivero_test_contact_form.default
-targetEntityType: contact_message
-bundle: olivero_test_contact_form
-mode: default
-content:
-  copy:
-    weight: 50
-    settings: {  }
-    third_party_settings: {  }
-    region: content
-  field_multiple_value_form_field:
-    weight: 51
-    settings:
-      size: 60
-      placeholder: ''
-    third_party_settings: {  }
-    type: string_textfield
-    region: content
-  mail:
-    weight: -40
-    settings: {  }
-    third_party_settings: {  }
-    region: content
-  message:
-    type: string_textarea
-    weight: 0
-    settings:
-      rows: 12
-      placeholder: ''
-    region: content
-    third_party_settings: {  }
-  name:
-    weight: -50
-    settings: {  }
-    third_party_settings: {  }
-    region: content
-  preview:
-    weight: 40
-    settings: {  }
-    third_party_settings: {  }
-    region: content
-  subject:
-    type: string_textfield
-    weight: -10
-    region: content
-    settings:
-      size: 60
-      placeholder: ''
-    third_party_settings: {  }
-hidden: {  }
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.node.article.default.yml b/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.node.article.default.yml
deleted file mode 100644
index 1f7102dd49ed5e223d5f5664d0682b6c88f40f73..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_form_display.node.article.default.yml
+++ /dev/null
@@ -1,106 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - field.field.node.article.body
-    - field.field.node.article.comment
-    - field.field.node.article.field_image
-    - field.field.node.article.field_tags
-    - image.style.thumbnail
-    - node.type.article
-  module:
-    - comment
-    - image
-    - path
-    - text
-id: node.article.default
-targetEntityType: node
-bundle: article
-mode: default
-content:
-  body:
-    type: text_textarea_with_summary
-    weight: 1
-    region: content
-    settings:
-      rows: 9
-      summary_rows: 3
-      placeholder: ''
-      show_summary: false
-    third_party_settings: {  }
-  comment:
-    type: comment_default
-    weight: 20
-    region: content
-    settings: {  }
-    third_party_settings: {  }
-  created:
-    type: datetime_timestamp
-    weight: 10
-    region: content
-    settings: {  }
-    third_party_settings: {  }
-  field_image:
-    type: image_image
-    weight: 4
-    region: content
-    settings:
-      progress_indicator: throbber
-      preview_image_style: thumbnail
-    third_party_settings: {  }
-  field_tags:
-    type: entity_reference_autocomplete_tags
-    weight: 3
-    region: content
-    settings:
-      match_operator: CONTAINS
-      match_limit: 10
-      size: 60
-      placeholder: ''
-    third_party_settings: {  }
-  path:
-    type: path
-    weight: 30
-    region: content
-    settings: {  }
-    third_party_settings: {  }
-  promote:
-    type: boolean_checkbox
-    settings:
-      display_label: true
-    weight: 15
-    region: content
-    third_party_settings: {  }
-  status:
-    type: boolean_checkbox
-    settings:
-      display_label: true
-    weight: 120
-    region: content
-    third_party_settings: {  }
-  sticky:
-    type: boolean_checkbox
-    settings:
-      display_label: true
-    weight: 16
-    region: content
-    third_party_settings: {  }
-  title:
-    type: string_textfield
-    weight: 0
-    region: content
-    settings:
-      size: 60
-      placeholder: ''
-    third_party_settings: {  }
-  uid:
-    type: entity_reference_autocomplete
-    weight: 5
-    region: content
-    settings:
-      match_operator: CONTAINS
-      match_limit: 10
-      size: 60
-      placeholder: ''
-    third_party_settings: {  }
-hidden: {  }
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.comment.comment.default.yml b/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.comment.comment.default.yml
deleted file mode 100644
index 6ae213d3ee0d356970eb84dffb2ace80b6a79c93..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.comment.comment.default.yml
+++ /dev/null
@@ -1,24 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - comment.type.comment
-    - field.field.comment.comment.comment_body
-  module:
-    - text
-id: comment.comment.default
-targetEntityType: comment
-bundle: comment
-mode: default
-content:
-  comment_body:
-    label: hidden
-    type: text_default
-    weight: 0
-    region: content
-    settings: {  }
-    third_party_settings: {  }
-  links:
-    weight: 100
-    region: content
-hidden: {  }
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.default.yml b/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.default.yml
deleted file mode 100644
index 5019b6503d79308a2673fcf681445d885cd056a4..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.default.yml
+++ /dev/null
@@ -1,60 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - core.entity_view_display.comment.comment.default
-    - field.field.node.article.body
-    - field.field.node.article.comment
-    - field.field.node.article.field_image
-    - field.field.node.article.field_tags
-    - image.style.large
-    - node.type.article
-  module:
-    - comment
-    - image
-    - text
-    - user
-id: node.article.default
-targetEntityType: node
-bundle: article
-mode: default
-content:
-  body:
-    type: text_default
-    weight: 0
-    region: content
-    settings: {  }
-    third_party_settings: {  }
-    label: hidden
-  comment:
-    type: comment_default
-    weight: 110
-    region: content
-    label: above
-    settings:
-      view_mode: default
-      pager_id: 0
-    third_party_settings: {  }
-  field_image:
-    type: image
-    weight: -1
-    region: content
-    settings:
-      image_style: large
-      image_link: ''
-    third_party_settings: {  }
-    label: hidden
-  field_tags:
-    type: entity_reference_label
-    weight: 10
-    region: content
-    label: above
-    settings:
-      link: true
-    third_party_settings: {  }
-  links:
-    weight: 100
-    region: content
-    settings: {  }
-    third_party_settings: {  }
-hidden: {  }
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.rss.yml b/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.rss.yml
deleted file mode 100644
index 84660b6d2bd2b6ba734139b2472b1c54124652df..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.rss.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - core.entity_view_mode.node.rss
-    - field.field.node.article.body
-    - field.field.node.article.comment
-    - field.field.node.article.field_image
-    - field.field.node.article.field_tags
-    - node.type.article
-  module:
-    - user
-id: node.article.rss
-targetEntityType: node
-bundle: article
-mode: rss
-content:
-  links:
-    weight: 100
-    region: content
-hidden:
-  body: true
-  comment: true
-  field_image: true
-  field_tags: true
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.teaser.yml b/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.teaser.yml
deleted file mode 100644
index 7b96908bed1c460a0525aadebde8847400954d00..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/core.entity_view_display.node.article.teaser.yml
+++ /dev/null
@@ -1,52 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - core.entity_view_mode.node.teaser
-    - field.field.node.article.body
-    - field.field.node.article.comment
-    - field.field.node.article.field_image
-    - field.field.node.article.field_tags
-    - image.style.medium
-    - node.type.article
-  module:
-    - image
-    - text
-    - user
-id: node.article.teaser
-targetEntityType: node
-bundle: article
-mode: teaser
-content:
-  body:
-    type: text_summary_or_trimmed
-    weight: 0
-    region: content
-    settings:
-      trim_length: 600
-    third_party_settings: {  }
-    label: hidden
-  field_image:
-    type: image
-    weight: -1
-    region: content
-    settings:
-      image_style: medium
-      image_link: content
-    third_party_settings: {  }
-    label: hidden
-  field_tags:
-    type: entity_reference_label
-    weight: 10
-    region: content
-    settings:
-      link: true
-    third_party_settings: {  }
-    label: above
-  links:
-    weight: 100
-    region: content
-hidden:
-  comment: true
-  field_image: true
-  field_tags: true
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.field.comment.comment.comment_body.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.field.comment.comment.comment_body.yml
deleted file mode 100644
index 1337070d16b859309099244a0e475bc7b6be2d77..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.field.comment.comment.comment_body.yml
+++ /dev/null
@@ -1,20 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - comment.type.comment
-    - field.storage.comment.comment_body
-  module:
-    - text
-id: comment.comment.comment_body
-field_name: comment_body
-entity_type: comment
-bundle: comment
-label: Comment
-description: ''
-required: true
-translatable: true
-default_value: {  }
-default_value_callback: ''
-settings: {  }
-field_type: text_long
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.field.contact_message.olivero_test_contact_form.field_multiple_value_form_field.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.field.contact_message.olivero_test_contact_form.field_multiple_value_form_field.yml
deleted file mode 100644
index 48586444177ff68e47aaa276605307006b4ebc1f..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.field.contact_message.olivero_test_contact_form.field_multiple_value_form_field.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - contact.form.olivero_test_contact_form
-    - field.storage.contact_message.field_multiple_value_form_field
-id: contact_message.olivero_test_contact_form.field_multiple_value_form_field
-field_name: field_multiple_value_form_field
-entity_type: contact_message
-bundle: olivero_test_contact_form
-label: 'Multiple Value Form Field'
-description: ''
-required: true
-translatable: false
-default_value: {  }
-default_value_callback: ''
-settings: {  }
-field_type: string
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.body.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.body.yml
deleted file mode 100644
index b36fbd584493fcbd6c7d5a813b458845cdd67dd7..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.body.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - field.storage.node.body
-    - node.type.article
-  module:
-    - text
-id: node.article.body
-field_name: body
-entity_type: node
-bundle: article
-label: Body
-description: ''
-required: false
-translatable: true
-default_value: {  }
-default_value_callback: ''
-settings:
-  display_summary: true
-  required_summary: false
-field_type: text_with_summary
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.comment.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.comment.yml
deleted file mode 100644
index 922015ed9666552f9ca5cf68c06b1d9340917ff9..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.comment.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - field.storage.node.comment
-    - node.type.article
-  module:
-    - comment
-id: node.article.comment
-field_name: comment
-entity_type: node
-bundle: article
-label: Comments
-description: ''
-required: false
-translatable: true
-default_value:
-  -
-    status: 2
-    cid: 0
-    last_comment_name: null
-    last_comment_timestamp: 0
-    last_comment_uid: 0
-    comment_count: 0
-default_value_callback: ''
-settings:
-  default_mode: 1
-  per_page: 50
-  form_location: true
-  anonymous: 0
-  preview: 1
-field_type: comment
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.field_image.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.field_image.yml
deleted file mode 100644
index b4b1c1466b7dcf3e37f29dee9494a6d36796a359..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.field_image.yml
+++ /dev/null
@@ -1,37 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - field.storage.node.field_image
-    - node.type.article
-  module:
-    - image
-id: node.article.field_image
-field_name: field_image
-entity_type: node
-bundle: article
-label: Image
-description: ''
-required: false
-translatable: true
-default_value: {  }
-default_value_callback: ''
-settings:
-  file_directory: '[date:custom:Y]-[date:custom:m]'
-  file_extensions: 'png gif jpg jpeg'
-  max_filesize: ''
-  max_resolution: ''
-  min_resolution: ''
-  alt_field: true
-  title_field: false
-  alt_field_required: true
-  title_field_required: false
-  default_image:
-    uuid: null
-    alt: ''
-    title: ''
-    width: null
-    height: null
-  handler: 'default:file'
-  handler_settings: {  }
-field_type: image
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.field_tags.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.field_tags.yml
deleted file mode 100644
index 1b9c4cc4ee1e1143722aeac9ef20e9aaaf27199d..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.field.node.article.field_tags.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  config:
-    - field.storage.node.field_tags
-    - node.type.article
-    - taxonomy.vocabulary.tags
-id: node.article.field_tags
-field_name: field_tags
-entity_type: node
-bundle: article
-label: Tags
-description: 'Enter a comma-separated list. For example: Amsterdam, Mexico City, "Cleveland, Ohio"'
-required: false
-translatable: true
-default_value: {  }
-default_value_callback: ''
-settings:
-  handler: 'default:taxonomy_term'
-  handler_settings:
-    target_bundles:
-      tags: tags
-    sort:
-      field: _none
-    auto_create: true
-field_type: entity_reference
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.storage.contact_message.field_multiple_value_form_field.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.storage.contact_message.field_multiple_value_form_field.yml
deleted file mode 100644
index faef295203403e2755005d96489eec6584f33365..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.storage.contact_message.field_multiple_value_form_field.yml
+++ /dev/null
@@ -1,20 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  module:
-    - contact
-id: contact_message.field_multiple_value_form_field
-field_name: field_multiple_value_form_field
-entity_type: contact_message
-type: string
-settings:
-  max_length: 255
-  is_ascii: false
-  case_sensitive: false
-module: core
-locked: false
-cardinality: -1
-translatable: true
-indexes: {  }
-persist_with_no_fields: false
-custom_storage: false
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.comment.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.comment.yml
deleted file mode 100644
index c5eee2c2841d49ca883d3254094e95962b2cd78c..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.comment.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  module:
-    - comment
-    - node
-id: node.comment
-field_name: comment
-entity_type: node
-type: comment
-settings:
-  comment_type: comment
-module: comment
-locked: false
-cardinality: 1
-translatable: true
-indexes: {  }
-persist_with_no_fields: false
-custom_storage: false
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.field_image.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.field_image.yml
deleted file mode 100644
index e4da7085460c4a63141b904e0b2c2a676f78ae75..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.field_image.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  module:
-    - file
-    - image
-    - node
-id: node.field_image
-field_name: field_image
-entity_type: node
-type: image
-settings:
-  uri_scheme: public
-  default_image:
-    uuid: null
-    alt: ''
-    title: ''
-    width: null
-    height: null
-  target_type: file
-  display_field: false
-  display_default: false
-module: image
-locked: false
-cardinality: 1
-translatable: true
-indexes:
-  target_id:
-    - target_id
-persist_with_no_fields: false
-custom_storage: false
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.field_tags.yml b/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.field_tags.yml
deleted file mode 100644
index 73f821f2c0dea6f2e8cfbd7ddc14795dcda91acd..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/field.storage.node.field_tags.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  module:
-    - node
-    - taxonomy
-id: node.field_tags
-field_name: field_tags
-entity_type: node
-type: entity_reference
-settings:
-  target_type: taxonomy_term
-module: core
-locked: false
-cardinality: -1
-translatable: true
-indexes: {  }
-persist_with_no_fields: false
-custom_storage: false
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/node.type.article.yml b/core/modules/system/tests/modules/olivero_test/config/install/node.type.article.yml
deleted file mode 100644
index 1fd439ce71bf22657ff5b7e15805eb6f9b93ae05..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/node.type.article.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-langcode: en
-status: true
-dependencies: {  }
-name: Article
-type: article
-description: 'Use <em>articles</em> for time-sensitive content like news, press releases or blog posts.'
-help: ''
-new_revision: true
-preview_mode: 1
-display_submitted: true
diff --git a/core/modules/system/tests/modules/olivero_test/config/install/taxonomy.vocabulary.tags.yml b/core/modules/system/tests/modules/olivero_test/config/install/taxonomy.vocabulary.tags.yml
deleted file mode 100644
index 4c754e86c71598ec2002718b7568e91d413557ea..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/config/install/taxonomy.vocabulary.tags.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-langcode: en
-status: true
-dependencies: {  }
-name: Tags
-vid: tags
-description: 'Use tags to group articles on similar topics into categories.'
-weight: 0
diff --git a/core/modules/system/tests/modules/olivero_test/olivero_test.info.yml b/core/modules/system/tests/modules/olivero_test/olivero_test.info.yml
index 30e430d57c409ba4531a1b91f4035783798410ad..53451469da3e153cac82b69712cafed2e8d3505f 100644
--- a/core/modules/system/tests/modules/olivero_test/olivero_test.info.yml
+++ b/core/modules/system/tests/modules/olivero_test/olivero_test.info.yml
@@ -3,12 +3,3 @@ type: module
 description: 'Support module for testing the Olivero theme.'
 package: Testing
 version: VERSION
-dependencies:
-  - drupal:comment
-  - drupal:contact
-  - drupal:form_test
-  - drupal:image
-  - drupal:path
-  - drupal:search
-  - drupal:taxonomy
-  - drupal:views
diff --git a/core/modules/system/tests/modules/olivero_test/olivero_test.module b/core/modules/system/tests/modules/olivero_test/olivero_test.module
deleted file mode 100644
index 6be87370e6ebe090e8d346ac5eb716ec1b9136e2..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/olivero_test/olivero_test.module
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-/**
- * @file
- * Functions to support testing the Olivero theme.
- */
-
-/**
- * Implements hook_preprocess_field_multiple_value_form().
- */
-function olivero_test_preprocess_field_multiple_value_form(&$variables) {
-  // Set test multiple value form field to disabled
-  if ($variables["element"]["#field_name"] === "field_multiple_value_form_field") {
-    $variables['element']['#disabled'] = TRUE;
-  }
-}
diff --git a/core/tests/Drupal/FunctionalTests/Theme/OliveroTest.php b/core/tests/Drupal/FunctionalTests/Theme/OliveroTest.php
index ddae798c6fff5b4d34e8b4ac0dcf4f40d5b4aca9..1668bf253131d452a1b16cbe8ed24e52a5fbb9be 100644
--- a/core/tests/Drupal/FunctionalTests/Theme/OliveroTest.php
+++ b/core/tests/Drupal/FunctionalTests/Theme/OliveroTest.php
@@ -3,7 +3,6 @@
 namespace Drupal\FunctionalTests\Theme;
 
 use Drupal\Tests\BrowserTestBase;
-use Drupal\menu_link_content\Entity\MenuLinkContent;
 
 /**
  * Tests the Olivero theme.
@@ -15,18 +14,30 @@ class OliveroTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  protected $profile = 'minimal';
+  protected static $modules = ['system', 'block'];
 
   /**
    * {@inheritdoc}
+   *
+   * It should eventually be possible to set this to 'olivero' once the theme
+   * is in core.
    */
-  protected $defaultTheme = 'olivero';
+  protected $defaultTheme = 'stark';
 
   /**
    * {@inheritdoc}
    */
   protected function setUp(): void {
     parent::setUp();
+
+    // Install & set Olivero as default the theme.
+    // Note: it should be possible to remove this once Olivero can be set as
+    // the default theme above.
+    $this->container->get('theme_installer')->install(['olivero'], TRUE);
+    $system_theme_config = $this->container->get('config.factory')->getEditable('system.theme');
+    $system_theme_config
+      ->set('default', 'olivero')
+      ->save();
   }
 
   /**
@@ -64,67 +75,11 @@ public function testConfigSchema() {
     $this->assertSession()->elementExists('css', '#block-olivero-search-form-wide');
   }
 
-  /**
-   * Tests that olivero_preprocess_block is functioning as expected.
-   *
-   * @see olivero.libraries.yml
-   */
-  public function testPreprocessBlock() {
-    $this->drupalGet('');
-    $this->assertSession()->statusCodeEquals(200);
-
-    // Confirm that search narrow and search wide libraries haven't yet been
-    // added.
-    $this->assertSession()->responseNotContains('olivero/css/components/header-search-wide.css');
-    $this->assertSession()->responseNotContains('olivero/css/components/header-search-narrow.css');
-
-    // Enable modules that will exercise preprocess block logic.
-    \Drupal::service('module_installer')->install(
-      ['search', 'menu_link_content']
-    );
-
-    // Add at least one link to the main menu.
-    $parent_menu_link_content = MenuLinkContent::create([
-      'title' => 'Home',
-      'menu_name' => 'main',
-      'link' => ['uri' => 'route:<front>'],
-    ]);
-    $parent_menu_link_content->save();
-
-    // Set branding color.
-    $system_theme_config = $this->container->get('config.factory')->getEditable('olivero.settings');
-    $system_theme_config
-      ->set('site_branding_bg_color', 'gray')
-      ->save();
-
-    $this->rebuildAll();
-    $this->drupalLogin(
-      $this->drupalCreateUser(['search content'])
-    );
-
-    // Ensure region attribute was added for primary menu.
-    $this->assertSession()->elementExists('css', 'ul[region="primary_menu"]');
-
-    // Confirm that search narrow and search wide libraries were added by
-    // preprocess.
-    $this->assertSession()->responseContains('olivero/css/components/header-search-wide.css');
-    $this->assertSession()->responseContains('olivero/css/components/header-search-narrow.css');
-
-    // Confirm primary-nav class was added to main menu navigation block.
-    $this->assertSession()->elementExists('css', '#block-olivero-main-menu.primary-nav');
-
-    // Ensure branding background color class was added.
-    $this->assertSession()->elementExists('css', '#block-olivero-site-branding.site-branding--bg-gray');
-  }
-
   /**
    * Tests that the Olivero theme can be uninstalled.
    */
   public function testIsUninstallable() {
-    $this->drupalLogin($this->drupalCreateUser([
-      'access administration pages',
-      'administer themes',
-    ]));
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer themes']));
 
     $this->drupalGet('admin/appearance');
     $this->cssSelect('a[title="Install Bartik as default theme"]')[0]->click();
diff --git a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroCommentTest.js b/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroCommentTest.js
deleted file mode 100644
index 6b7195ca454741461c447616935328a5b9085351..0000000000000000000000000000000000000000
--- a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroCommentTest.js
+++ /dev/null
@@ -1,41 +0,0 @@
-const commentTitleSelector = 'h2.comments__title';
-const commentCountSelector = 'h2.comments__title .comments__count';
-
-module.exports = {
-  '@tags': ['core', 'olivero'],
-  before(browser) {
-    browser
-      .drupalInstall({
-        setupFile:
-          'core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php',
-        installProfile: 'minimal',
-      })
-      .drupalCreateUser({
-        name: 'user',
-        password: '123',
-        permissions: [
-          'access comments',
-          'post comments',
-          'skip comment approval',
-        ],
-      })
-      .drupalLogin({ name: 'user', password: '123' });
-  },
-  after(browser) {
-    browser.drupalUninstall();
-  },
-  'Article without comments should not display count': (browser) => {
-    browser
-      .drupalRelativeURL('/node/1')
-      .assert.containsText('body', 'Article without comments')
-      .assert.not.elementPresent(commentTitleSelector);
-  },
-  'Article with comments should display count': (browser) => {
-    browser
-      .drupalRelativeURL('/node/2')
-      .assert.containsText('body', 'Article with comments')
-      .assert.elementPresent(commentTitleSelector)
-      .assert.elementPresent(commentCountSelector)
-      .assert.containsText(commentCountSelector, '2');
-  },
-};
diff --git a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroDesktopMenuTest.js b/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroDesktopMenuTest.js
deleted file mode 100644
index faca431341d6ca001a653c367a4950399afb012f..0000000000000000000000000000000000000000
--- a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroDesktopMenuTest.js
+++ /dev/null
@@ -1,71 +0,0 @@
-const headerNavSelector = '#header-nav';
-const linkSubMenuId = 'home-submenu-1';
-const buttonSubMenuId = 'button-submenu-2';
-
-module.exports = {
-  '@tags': ['core', 'olivero'],
-  before(browser) {
-    browser.drupalInstall({
-      setupFile:
-        'core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php',
-      installProfile: 'minimal',
-    });
-    browser.resizeWindow(1600, 800);
-  },
-  after(browser) {
-    browser.drupalUninstall();
-  },
-  'Verify Olivero desktop menu click functionality': (browser) => {
-    browser
-      .drupalRelativeURL('/node')
-      .waitForElementVisible(headerNavSelector)
-      .assert.not.visible(`#${linkSubMenuId}`)
-      .assert.attributeEquals(
-        `[aria-controls="${linkSubMenuId}"]`,
-        'aria-expanded',
-        'false',
-      )
-      .click(`[aria-controls="${linkSubMenuId}"]`)
-      .assert.visible(`#${linkSubMenuId}`)
-      .assert.attributeEquals(
-        `[aria-controls="${linkSubMenuId}"]`,
-        'aria-expanded',
-        'true',
-      )
-
-      // Test interactions for route:<button> menu links.
-      .assert.not.visible(`#${buttonSubMenuId}`)
-      .assert.attributeEquals(
-        `[aria-controls="${buttonSubMenuId}"]`,
-        'aria-expanded',
-        'false',
-      )
-      .click(`[aria-controls="${buttonSubMenuId}"]`)
-      .assert.visible(`#${buttonSubMenuId}`)
-      .assert.attributeEquals(
-        `[aria-controls="${buttonSubMenuId}"]`,
-        'aria-expanded',
-        'true',
-      );
-  },
-  'Verify Olivero desktop menu hover functionality': (browser) => {
-    browser
-      .drupalRelativeURL('/node')
-      .waitForElementVisible(headerNavSelector)
-      .assert.visible(headerNavSelector)
-      .moveToElement('link text', 'home')
-      .assert.visible(`#${linkSubMenuId}`)
-      .assert.attributeEquals(
-        `[aria-controls="${linkSubMenuId}"]`,
-        'aria-expanded',
-        'true',
-      )
-      .moveToElement('link text', 'button')
-      .assert.visible(`#${buttonSubMenuId}`)
-      .assert.attributeEquals(
-        `[aria-controls="${buttonSubMenuId}"]`,
-        'aria-expanded',
-        'true',
-      );
-  },
-};
diff --git a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroPreprocessFieldMultipleValueFormTest.js b/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroPreprocessFieldMultipleValueFormTest.js
deleted file mode 100644
index 3bbdc7259073e959e97873816be0b018211c26ce..0000000000000000000000000000000000000000
--- a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroPreprocessFieldMultipleValueFormTest.js
+++ /dev/null
@@ -1,41 +0,0 @@
-const tableSelector = '#edit-field-multiple-value-form-field-wrapper table';
-const tableHeaderSelector = '#edit-field-multiple-value-form-field-wrapper th';
-const headerSelector = '#edit-field-multiple-value-form-field-wrapper h4';
-
-module.exports = {
-  '@tags': ['core', 'olivero'],
-  before(browser) {
-    browser
-      .drupalInstall({
-        setupFile:
-          'core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php',
-        installProfile: 'minimal',
-      })
-      .drupalCreateUser({
-        name: 'user',
-        password: '123',
-        permissions: ['access site-wide contact form'],
-      })
-      .drupalLogin({ name: 'user', password: '123' });
-  },
-  after(browser) {
-    browser.drupalUninstall();
-  },
-  'correct classes added to table and header': (browser) => {
-    browser
-      .resizeWindow(1400, 800)
-      .drupalRelativeURL('/contact/olivero_test_contact_form')
-      .waitForElementVisible(tableSelector, 1000)
-      .assert.cssClassPresent(tableSelector, [
-        'tabledrag-disabled',
-        'js-tabledrag-disabled',
-      ])
-      .assert.cssClassPresent(tableHeaderSelector, 'is-disabled')
-      .assert.cssClassPresent(headerSelector, [
-        'form-item__label',
-        'form-item__label--multiple-value-form',
-        'js-form-required',
-        'form-required',
-      ]);
-  },
-};
diff --git a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroPreprocessInputTest.js b/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroPreprocessInputTest.js
deleted file mode 100644
index 368b207d2d7cc7f966289931036fb10b4816c0ea..0000000000000000000000000000000000000000
--- a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroPreprocessInputTest.js
+++ /dev/null
@@ -1,112 +0,0 @@
-const checkboxSelector = '#edit-form-checkboxes-title-attribute';
-
-const inputTypes = [
-  {
-    selector: '#edit-form-textfield-test-title-and-required',
-    type: 'text',
-    api: 'textfield',
-  },
-  {
-    selector: '#edit-form-email-title-no-xss',
-    type: 'email',
-    api: 'email',
-  },
-  {
-    selector: '#edit-form-tel-title-no-xss',
-    type: 'tel',
-    api: 'tel',
-  },
-  {
-    selector: '#edit-form-number-title-no-xss',
-    type: 'number',
-    api: 'number',
-  },
-  {
-    selector: '#edit-form-search-title-no-xss',
-    type: 'search',
-    api: 'search',
-  },
-  {
-    selector: '#edit-form-password-title-no-xss',
-    type: 'password',
-    api: 'password',
-  },
-  {
-    selector: '#edit-form-date-title-no-xss',
-    type: 'date',
-    api: 'date',
-  },
-  {
-    selector: '#edit-form-datetime-title-no-xss-time',
-    type: 'time',
-    api: 'date',
-  },
-  {
-    selector: '#edit-form-file-title-no-xss',
-    type: 'file',
-    api: 'file',
-  },
-  {
-    selector: '#edit-form-color-title-no-xss',
-    type: 'color',
-    api: 'color',
-  },
-  {
-    selector: '#edit-form-url-title-no-xss',
-    type: 'url',
-    api: 'url',
-  },
-  // TODO - Cover datetime-local, month, week - no test form input examples are easily available
-];
-
-const booleanInputTypes = [
-  {
-    selector: '#edit-form-checkboxes-test-first-checkbox',
-    type: 'checkbox',
-  },
-  {
-    selector: '#edit-form-radios-title-attribute-first-radio',
-    type: 'radio',
-  },
-];
-
-module.exports = {
-  '@tags': ['core', 'olivero'],
-  before(browser) {
-    browser.drupalInstall({
-      setupFile:
-        'core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php',
-      installProfile: 'minimal',
-    });
-  },
-  after(browser) {
-    browser.drupalUninstall();
-  },
-  'Confirm that title attribute exists if set to display': (browser) => {
-    browser
-      .resizeWindow(1400, 800)
-      .drupalRelativeURL('/form_test/form-labels')
-      .waitForElementVisible(checkboxSelector, 1000)
-      .assert.attributeEquals(
-        checkboxSelector,
-        'title',
-        'Checkboxes test (Required)',
-      );
-  },
-  'Check form element classes by type': (browser) => {
-    browser.drupalRelativeURL('/form_test/form-labels');
-    inputTypes.forEach((inputType) => {
-      browser.assert.cssClassPresent(inputType.selector, [
-        'form-element',
-        `form-element--type-${inputType.type}`,
-        `form-element--api-${inputType.api}`,
-      ]);
-    });
-    booleanInputTypes.forEach((booleanInputType) => {
-      browser.assert.cssClassPresent(booleanInputType.selector, [
-        'form-boolean',
-        `form-boolean--type-${booleanInputType.type}`,
-      ]);
-    });
-  },
-};
diff --git a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroSearchFormTest.js b/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroSearchFormTest.js
deleted file mode 100644
index 0632b20a05340edbc9d3f78595e7328252ba5cb2..0000000000000000000000000000000000000000
--- a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroSearchFormTest.js
+++ /dev/null
@@ -1,82 +0,0 @@
-const mobileNavButtonSelector = 'button.mobile-nav-button';
-const headerNavSelector = '#header-nav';
-const searchButtonSelector = 'button.block-search-wide__button';
-const searchFormSelector = '.search-form.search-block-form';
-const searchWideSelector = '.block-search-wide__wrapper';
-const searchNarrowSelector = '.block-search-narrow';
-
-module.exports = {
-  '@tags': ['core', 'olivero'],
-  before(browser) {
-    browser
-      .drupalInstall({
-        setupFile:
-          'core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php',
-        installProfile: 'minimal',
-      })
-      // Create user that can search.
-      .drupalCreateUser({
-        name: 'user',
-        password: '123',
-        permissions: ['search content', 'use advanced search'],
-      })
-      .drupalLogin({ name: 'user', password: '123' });
-  },
-  after(browser) {
-    browser.drupalUninstall();
-  },
-  'search wide form is accessible and altered': (browser) => {
-    browser
-      .resizeWindow(1400, 800)
-      .drupalRelativeURL('/')
-      .click(searchButtonSelector)
-      .waitForElementVisible(`${searchWideSelector}`)
-      .waitForElementVisible(`${searchWideSelector} ${searchFormSelector}`)
-      .assert.attributeContains(
-        `${searchWideSelector} ${searchFormSelector} input[name=keys]`,
-        'placeholder',
-        'Search by keyword or phrase.',
-      )
-      .assert.attributeContains(
-        `${searchWideSelector} ${searchFormSelector} input[name=keys]`,
-        'title',
-        'Enter the terms you wish to search for.',
-      )
-      .assert.elementPresent('button.search-form__submit');
-  },
-  'search narrow form is accessible': (browser) => {
-    browser
-      .resizeWindow(1000, 800)
-      .drupalRelativeURL('/')
-      .click(mobileNavButtonSelector)
-      .waitForElementVisible(headerNavSelector)
-      .waitForElementVisible(`${searchNarrowSelector} ${searchFormSelector}`);
-  },
-  'submit button styled as primary on forms with <= 2 actions': (browser) => {
-    browser
-      .resizeWindow(1400, 800)
-      .drupalRelativeURL('/form-test/object-controller-builder')
-      .assert.elementPresent(
-        '#edit-actions input[type=submit].button--primary',
-      );
-  },
-  'search page is altered': (browser) => {
-    browser
-      .resizeWindow(1400, 800)
-      .drupalRelativeURL('/search')
-      .assert.attributeContains(
-        '.search-form input[name=keys]',
-        'placeholder',
-        'Search by keyword or phrase.',
-      )
-      .assert.attributeContains(
-        '.search-form input[name=keys]',
-        'title',
-        'Enter the terms you wish to search for.',
-      )
-      .assert.elementPresent('#edit-basic input[type=submit].button--primary')
-      .assert.elementPresent(
-        '#edit-advanced input[type=submit].button--primary',
-      );
-  },
-};
diff --git a/core/tests/Drupal/Nightwatch/Tests/oliveroDesktopMenuTest.js b/core/tests/Drupal/Nightwatch/Tests/oliveroDesktopMenuTest.js
new file mode 100644
index 0000000000000000000000000000000000000000..f581ef57344b062dbbc54f04e7d662dfb155c5d4
--- /dev/null
+++ b/core/tests/Drupal/Nightwatch/Tests/oliveroDesktopMenuTest.js
@@ -0,0 +1,159 @@
+const headerNavSelector = '#header-nav';
+const linkSubMenuId = 'home-submenu-1';
+const buttonSubMenuId = 'button-submenu-2';
+
+module.exports = {
+  '@tags': ['core', 'olivero'],
+  before(browser) {
+    browser.drupalInstall({
+      setupFile:
+        'core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php',
+      installProfile: 'minimal',
+    });
+    browser.resizeWindow(1600, 800);
+  },
+  after(browser) {
+    browser.drupalUninstall();
+  },
+  'Verify Olivero desktop menu click functionality': (browser) => {
+    browser
+      .drupalRelativeURL('/node')
+      .waitForElementVisible(headerNavSelector)
+      .assert.not.visible(`#${linkSubMenuId}`)
+      .assert.attributeEquals(
+        `[aria-controls="${linkSubMenuId}"]`,
+        'aria-expanded',
+        'false',
+      )
+      .click(`[aria-controls="${linkSubMenuId}"]`)
+      .assert.visible(`#${linkSubMenuId}`)
+      .assert.attributeEquals(
+        `[aria-controls="${linkSubMenuId}"]`,
+        'aria-expanded',
+        'true',
+      )
+
+      // Test interactions for route:<button> menu links.
+      .assert.not.visible(`#${buttonSubMenuId}`)
+      .assert.attributeEquals(
+        `[aria-controls="${buttonSubMenuId}"]`,
+        'aria-expanded',
+        'false',
+      )
+      .click(`[aria-controls="${buttonSubMenuId}"]`)
+      .assert.visible(`#${buttonSubMenuId}`)
+      .assert.attributeEquals(
+        `[aria-controls="${buttonSubMenuId}"]`,
+        'aria-expanded',
+        'true',
+      );
+  },
+  'Verify Olivero desktop menu hover functionality': (browser) => {
+    browser
+      .drupalRelativeURL('/node')
+      .waitForElementVisible(headerNavSelector)
+      .assert.visible(headerNavSelector)
+      .moveToElement('link text', 'home')
+      .assert.visible(`#${linkSubMenuId}`)
+      .assert.attributeEquals(
+        `[aria-controls="${linkSubMenuId}"]`,
+        'aria-expanded',
+        'true',
+      )
+      .moveToElement('link text', 'button')
+      .assert.visible(`#${buttonSubMenuId}`)
+      .assert.attributeEquals(
+        `[aria-controls="${buttonSubMenuId}"]`,
+        'aria-expanded',
+        'true',
+      );
+  },
+  'Verify secondary navigation close on blur': (browser) => {
+    browser
+      .drupalRelativeURL('/node')
+      .waitForElementVisible(headerNavSelector)
+      .click(`[aria-controls="${linkSubMenuId}"]`)
+      .assert.attributeEquals(
+        `[aria-controls="${linkSubMenuId}"]`,
+        'aria-expanded',
+        'true',
+      );
+    browser
+      .execute(
+        // eslint-disable-next-line func-names, prefer-arrow-callback, no-shadow
+        function () {
+          document.querySelector('.site-branding__name a').focus();
+        },
+        [],
+      )
+      .pause(400)
+      .assert.attributeEquals(
+        `[aria-controls="${linkSubMenuId}"]`,
+        'aria-expanded',
+        'false',
+      );
+  },
+  'Verify parent <button> focus on ESC in wide navigation': (browser) => {
+    browser
+      // Verify functionality on regular link's button.
+      .drupalRelativeURL('/node')
+      .waitForElementVisible(headerNavSelector)
+      .click(`[aria-controls="${linkSubMenuId}"]`)
+      .waitForElementVisible(`#${linkSubMenuId}`)
+      .keys(browser.Keys.TAB)
+      .pause(50)
+      .execute(
+        // eslint-disable-next-line func-names, prefer-arrow-callback, no-shadow
+        function (linkSubMenuId) {
+          return document.activeElement.matches(`#${linkSubMenuId} *`);
+        },
+        [linkSubMenuId],
+        (result) => {
+          browser.assert.ok(result.value);
+        },
+      )
+      .keys(browser.Keys.ESCAPE)
+      .pause(50)
+      .execute(
+        // eslint-disable-next-line func-names, prefer-arrow-callback, no-shadow
+        function (linkSubMenuId) {
+          return document.activeElement.matches(
+            `[aria-controls="${linkSubMenuId}"]`,
+          );
+        },
+        [linkSubMenuId],
+        (result) => {
+          browser.assert.ok(result.value);
+        },
+      )
+      // Verify functionality on route:<button> button.
+      .click(`[aria-controls="${buttonSubMenuId}"]`)
+      .waitForElementVisible(`#${buttonSubMenuId}`)
+      .keys(browser.Keys.TAB)
+      .pause(50)
+      .execute(
+        // eslint-disable-next-line func-names, prefer-arrow-callback, no-shadow
+        function (buttonSubMenuId) {
+          return document.activeElement.matches(`#${buttonSubMenuId} *`);
+        },
+        [buttonSubMenuId],
+        (result) => {
+          browser.assert.ok(result.value);
+        },
+      )
+      .keys(browser.Keys.ESCAPE)
+      .pause(50)
+      .execute(
+        // eslint-disable-next-line func-names, prefer-arrow-callback, no-shadow
+        function (buttonSubMenuId) {
+          return document.activeElement.matches(
+            `[aria-controls="${buttonSubMenuId}"]`,
+          );
+        },
+        [buttonSubMenuId],
+        (result) => {
+          browser.assert.ok(result.value);
+        },
+      );
+  },
+};
diff --git a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroMobileMenuTest.js b/core/tests/Drupal/Nightwatch/Tests/oliveroMobileMenuTest.js
similarity index 100%
rename from core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroMobileMenuTest.js
rename to core/tests/Drupal/Nightwatch/Tests/oliveroMobileMenuTest.js
diff --git a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroStickyHeaderToggleTest.js b/core/tests/Drupal/Nightwatch/Tests/oliveroStickyHeaderToggleTest.js
similarity index 90%
rename from core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroStickyHeaderToggleTest.js
rename to core/tests/Drupal/Nightwatch/Tests/oliveroStickyHeaderToggleTest.js
index edb169b821d6e88319883027844ee2faf78beafb..5d238e30a5a7badfed3d1bd940a880499117f69f 100644
--- a/core/tests/Drupal/Nightwatch/Tests/Olivero/oliveroStickyHeaderToggleTest.js
+++ b/core/tests/Drupal/Nightwatch/Tests/oliveroStickyHeaderToggleTest.js
@@ -17,6 +17,10 @@ module.exports = {
   'On scroll, menu collapses to burger 🍔 menu': (browser) => {
     browser
       .drupalRelativeURL('/node')
+      .assert.containsText(
+        '#block-olivero-content h2',
+        'Congratulations and welcome to the Drupal community!',
+      )
       .assert.not.visible(buttonSelector)
       .assert.attributeEquals(buttonSelector, 'aria-checked', 'false')
       .getLocationInView('footer.site-footer', () => {
diff --git a/core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php b/core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php
index a02c8d3a0430553edf88217ca154e22c38a5b13b..d1080d66f824e8bf80ddf9b97a2593de398bbbeb 100644
--- a/core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php
+++ b/core/tests/Drupal/TestSite/TestSiteOliveroInstallTestScript.php
@@ -4,8 +4,6 @@
 
 use Drupal\Core\Extension\ModuleInstallerInterface;
 use Drupal\Core\Extension\ThemeInstallerInterface;
-use Drupal\node\Entity\Node;
-use Drupal\comment\Entity\Comment;
 
 /**
  * Setup file used by TestSiteInstallTestScript.
@@ -21,7 +19,7 @@ public function setup() {
     // Install required module for the Olivero front page.
     $module_installer = \Drupal::service('module_installer');
     assert($module_installer instanceof ModuleInstallerInterface);
-    $module_installer->install(['olivero_test']);
+    $module_installer->install(['views', 'olivero_test']);
 
     // Install Olivero and set it as the default theme.
     $theme_installer = \Drupal::service('theme_installer');
@@ -29,40 +27,6 @@ public function setup() {
     $theme_installer->install(['olivero'], TRUE);
     $system_theme_config = \Drupal::configFactory()->getEditable('system.theme');
     $system_theme_config->set('default', 'olivero')->save();
-
-    // Create an article that will have no comments
-    $article_no_comments = Node::create(['type' => 'article']);
-    $article_no_comments->set('title', 'Article without comments');
-    // Enable comments
-    $article_no_comments->set('comment', 2);
-    $article_no_comments->save();
-
-    // Create an article that will have comments
-    $article_with_comments = Node::create(['type' => 'article']);
-    $article_with_comments->set('title', 'Article with comments');
-    // Enable comments
-    $article_with_comments->set('comment', 2);
-    $article_with_comments->save();
-
-    $values = [
-      // These values are for the entity that you're creating the comment for, not the comment itself.
-      'entity_type' => 'node',
-      'entity_id'   => 2,
-      'field_name'  => 'comment',
-      'uid' => 1,
-      // These values are for the comment itself.
-      'comment_type' => 'comment',
-      'subject' => 'A comment',
-      'comment_body' => 'Body of comment',
-      // Whether the comment is 'approved' or not.
-      'status' => 1,
-    ];
-    // Create comment entities out of our field values
-    $comment1 = Comment::create($values);
-    $comment1->save();
-
-    $comment2 = Comment::create($values);
-    $comment2->save();
   }
 
 }
diff --git a/core/themes/olivero/olivero.theme b/core/themes/olivero/olivero.theme
index 500ac751ff7a2aa7c4dc2f1c8fb1df67664b34ba..d0617dee55f402e412abc7ef788005d08fb4386b 100644
--- a/core/themes/olivero/olivero.theme
+++ b/core/themes/olivero/olivero.theme
@@ -188,7 +188,7 @@ function olivero_theme_suggestions_form_alter(array &$suggestions, array $variab
  * Implements hook_form_alter() for adding classes and placeholder text to the search forms.
  */
 function olivero_form_alter(&$form, FormStateInterface $form_state, $form_id) {
-  if (isset($form['actions']['submit']) && (count($form['actions'])) <= 2) {
+  if (isset($form['actions']) && (count($form['actions'])) <= 2) {
     $form['actions']['submit']['#attributes']['class'][] = 'button--primary';
   }
 
@@ -304,8 +304,6 @@ function olivero_preprocess_input(&$variables) {
     $variables['attributes']['class'][] = Html::getClass('form-element--type-' . $type_html);
     $variables['attributes']['class'][] = Html::getClass('form-element--api-' . $type_api);
 
-    // This logic is functioning as expected, but there is nothing in the theme that renders the result.
-    // As a result it can't currently be covered by a functional test.
     if (!empty($variables['element']['#autocomplete_route_name'])) {
       $variables['autocomplete_message'] = t('Loading…');
     }
@@ -372,7 +370,7 @@ function olivero_preprocess_field_multiple_value_form(&$variables) {
   // Make disabled available for the template.
   $variables['disabled'] = !empty($variables['element']['#disabled']);
 
-  if (!empty($variables['multiple'])) {
+  if ($variables['multiple']) {
     // Add an additional CSS class for the field label table cell.
     // This repeats the logic of template_preprocess_field_multiple_value_form()
     // without using '#prefix' and '#suffix' for the wrapper element.