diff --git a/app/assets/javascripts/environments/components/enable_review_app_modal.vue b/app/assets/javascripts/environments/components/enable_review_app_modal.vue
index d770a2302e8..b757c55bfdb 100644
--- a/app/assets/javascripts/environments/components/enable_review_app_modal.vue
+++ b/app/assets/javascripts/environments/components/enable_review_app_modal.vue
@@ -12,11 +12,20 @@ export default {
     ModalCopyButton,
   },
   inject: ['defaultBranchName'],
+  model: {
+    prop: 'visible',
+    event: 'change',
+  },
   props: {
     modalId: {
       type: String,
       required: true,
     },
+    visible: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
   },
   instructionText: {
     step1: s__(
@@ -57,12 +66,15 @@ export default {
 </script>
 <template>
   <gl-modal
+    :visible="visible"
     :modal-id="modalId"
     :title="$options.modalInfo.title"
+    static
     size="lg"
     ok-only
     ok-variant="light"
     :ok-title="$options.modalInfo.closeText"
+    @change="$emit('change', $event)"
   >
     <p>
       <gl-sprintf :message="$options.instructionText.step1">
diff --git a/app/assets/javascripts/environments/components/new_environments_app.vue b/app/assets/javascripts/environments/components/new_environments_app.vue
index bfb5689d623..fb86076b83c 100644
--- a/app/assets/javascripts/environments/components/new_environments_app.vue
+++ b/app/assets/javascripts/environments/components/new_environments_app.vue
@@ -1,12 +1,15 @@
 <script>
 import { GlBadge, GlTab, GlTabs } from '@gitlab/ui';
+import { s__ } from '~/locale';
 import environmentAppQuery from '../graphql/queries/environment_app.query.graphql';
 import pollIntervalQuery from '../graphql/queries/poll_interval.query.graphql';
 import EnvironmentFolder from './new_environment_folder.vue';
+import EnableReviewAppModal from './enable_review_app_modal.vue';
 
 export default {
   components: {
     EnvironmentFolder,
+    EnableReviewAppModal,
     GlBadge,
     GlTab,
     GlTabs,
@@ -22,22 +25,73 @@ export default {
       query: pollIntervalQuery,
     },
   },
+  inject: ['newEnvironmentPath', 'canCreateEnvironment'],
+  i18n: {
+    newEnvironmentButtonLabel: s__('Environments|New environment'),
+    reviewAppButtonLabel: s__('Environments|Enable review app'),
+  },
+  modalId: 'enable-review-app-info',
   data() {
-    return { interval: undefined };
+    return { interval: undefined, isReviewAppModalVisible: false };
   },
   computed: {
+    canSetupReviewApp() {
+      return this.environmentApp?.reviewApp?.canSetupReviewApp;
+    },
     folders() {
       return this.environmentApp?.environments.filter((e) => e.size > 1) ?? [];
     },
     availableCount() {
       return this.environmentApp?.availableCount;
     },
+    addEnvironment() {
+      if (!this.canCreateEnvironment) {
+        return null;
+      }
+
+      return {
+        text: this.$options.i18n.newEnvironmentButtonLabel,
+        attributes: {
+          href: this.newEnvironmentPath,
+          category: 'primary',
+          variant: 'confirm',
+        },
+      };
+    },
+    openReviewAppModal() {
+      if (!this.canSetupReviewApp) {
+        return null;
+      }
+
+      return {
+        text: this.$options.i18n.reviewAppButtonLabel,
+        attributes: {
+          category: 'secondary',
+          variant: 'confirm',
+        },
+      };
+    },
+  },
+  methods: {
+    showReviewAppModal() {
+      this.isReviewAppModalVisible = true;
+    },
   },
 };
 </script>
 <template>
   <div>
-    <gl-tabs>
+    <enable-review-app-modal
+      v-if="canSetupReviewApp"
+      v-model="isReviewAppModalVisible"
+      :modal-id="$options.modalId"
+      data-testid="enable-review-app-modal"
+    />
+    <gl-tabs
+      :action-secondary="addEnvironment"
+      :action-primary="openReviewAppModal"
+      @primary="showReviewAppModal"
+    >
       <gl-tab>
         <template #title>
           <span>{{ __('Available') }}</span>
diff --git a/app/assets/javascripts/invite_members/components/invite_members_modal.vue b/app/assets/javascripts/invite_members/components/invite_members_modal.vue
index 7163d1be773..91a139a5105 100644
--- a/app/assets/javascripts/invite_members/components/invite_members_modal.vue
+++ b/app/assets/javascripts/invite_members/components/invite_members_modal.vue
@@ -20,7 +20,6 @@ import { BV_SHOW_MODAL } from '~/lib/utils/constants';
 import { getParameterValues } from '~/lib/utils/url_utility';
 import { sprintf } from '~/locale';
 import {
-  INVITE_MEMBERS_IN_COMMENT,
   GROUP_FILTERS,
   USERS_FILTER_ALL,
   INVITE_MEMBERS_FOR_TASK,
@@ -254,11 +253,6 @@ export default {
         this.submitInviteMembers();
       }
     },
-    trackInvite() {
-      if (this.source === INVITE_MEMBERS_IN_COMMENT) {
-        this.trackEvent(INVITE_MEMBERS_IN_COMMENT, 'comment_invite_success');
-      }
-    },
     trackinviteMembersForTask() {
       const label = 'selected_tasks_to_be_done';
       const property = this.selectedTasksToBeDone.join(',');
@@ -312,7 +306,6 @@ export default {
 
         promises.push(apiAddByUserId(this.id, this.addByUserIdPostData(usersToAddById)));
       }
-      this.trackInvite();
       this.trackinviteMembersForTask();
 
       Promise.all(promises)
diff --git a/app/assets/javascripts/invite_members/components/invite_members_trigger.vue b/app/assets/javascripts/invite_members/components/invite_members_trigger.vue
index bf3250f63a5..7dd74f8803a 100644
--- a/app/assets/javascripts/invite_members/components/invite_members_trigger.vue
+++ b/app/assets/javascripts/invite_members/components/invite_members_trigger.vue
@@ -1,6 +1,5 @@
 <script>
 import { GlButton, GlLink, GlIcon } from '@gitlab/ui';
-import ExperimentTracking from '~/experimentation/experiment_tracking';
 import { s__ } from '~/locale';
 import eventHub from '../event_hub';
 import { TRIGGER_ELEMENT_BUTTON, TRIGGER_ELEMENT_SIDE_NAV } from '../constants';
@@ -32,11 +31,6 @@ export default {
       type: String,
       required: true,
     },
-    trackExperiment: {
-      type: String,
-      required: false,
-      default: undefined,
-    },
     triggerElement: {
       type: String,
       required: false,
@@ -72,9 +66,6 @@ export default {
       return baseAttributes;
     },
   },
-  mounted() {
-    this.trackExperimentOnShow();
-  },
   methods: {
     checkTrigger(targetTriggerElement) {
       return this.triggerElement === targetTriggerElement;
@@ -82,12 +73,6 @@ export default {
     openModal() {
       eventHub.$emit('openModal', { inviteeType: 'members', source: this.triggerSource });
     },
-    trackExperimentOnShow() {
-      if (this.trackExperiment) {
-        const tracking = new ExperimentTracking(this.trackExperiment);
-        tracking.event('comment_invite_shown');
-      }
-    },
   },
   TRIGGER_ELEMENT_BUTTON,
   TRIGGER_ELEMENT_SIDE_NAV,
diff --git a/app/assets/javascripts/invite_members/constants.js b/app/assets/javascripts/invite_members/constants.js
index 87d2fbc6aac..ec59b3909fe 100644
--- a/app/assets/javascripts/invite_members/constants.js
+++ b/app/assets/javascripts/invite_members/constants.js
@@ -2,7 +2,6 @@ import { __, s__ } from '~/locale';
 
 export const SEARCH_DELAY = 200;
 
-export const INVITE_MEMBERS_IN_COMMENT = 'invite_members_in_comment';
 export const INVITE_MEMBERS_FOR_TASK = {
   minimum_access_level: 30,
   name: 'invite_members_for_task',
diff --git a/app/assets/javascripts/repository/commits_service.js b/app/assets/javascripts/repository/commits_service.js
index 504efaea8cc..5fd9cfd4e53 100644
--- a/app/assets/javascripts/repository/commits_service.js
+++ b/app/assets/javascripts/repository/commits_service.js
@@ -52,14 +52,9 @@ export const loadCommits = async (projectPath, path, ref, offset) => {
   }
 
   // We fetch in batches of 25, so this ensures we don't refetch
-  Array.from(Array(COMMIT_BATCH_SIZE)).forEach((_, i) => {
-    addRequestedOffset(offset - i);
-    addRequestedOffset(offset + i);
-  });
+  Array.from(Array(COMMIT_BATCH_SIZE)).forEach((_, i) => addRequestedOffset(offset + i));
 
-  // Since a user could scroll either up or down, we want to support lazy loading in both directions
-  const commitsBatchUp = await fetchData(projectPath, path, ref, offset - COMMIT_BATCH_SIZE);
-  const commitsBatchDown = await fetchData(projectPath, path, ref, offset);
+  const commits = await fetchData(projectPath, path, ref, offset);
 
-  return commitsBatchUp.concat(commitsBatchDown);
+  return commits;
 };
diff --git a/app/assets/javascripts/repository/components/table/row.vue b/app/assets/javascripts/repository/components/table/row.vue
index bd06c064ab7..8fcec5fb893 100644
--- a/app/assets/javascripts/repository/components/table/row.vue
+++ b/app/assets/javascripts/repository/components/table/row.vue
@@ -13,7 +13,7 @@ import {
 import { escapeRegExp } from 'lodash';
 import paginatedTreeQuery from 'shared_queries/repository/paginated_tree.query.graphql';
 import { escapeFileUrl } from '~/lib/utils/url_utility';
-import { TREE_PAGE_SIZE } from '~/repository/constants';
+import { TREE_PAGE_SIZE, ROW_APPEAR_DELAY } from '~/repository/constants';
 import FileIcon from '~/vue_shared/components/file_icon.vue';
 import TimeagoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
 import glFeatureFlagMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
@@ -128,6 +128,7 @@ export default {
     return {
       commit: null,
       hasRowAppeared: false,
+      delayedRowAppear: null,
     };
   },
   computed: {
@@ -202,14 +203,19 @@ export default {
     rowAppeared() {
       this.hasRowAppeared = true;
 
+      if (this.commitInfo) {
+        return;
+      }
+
       if (this.glFeatures.lazyLoadCommits) {
-        this.$emit('row-appear', {
-          rowNumber: this.rowNumber,
-          hasCommit: Boolean(this.commitInfo),
-        });
+        this.delayedRowAppear = setTimeout(
+          () => this.$emit('row-appear', this.rowNumber),
+          ROW_APPEAR_DELAY,
+        );
       }
     },
     rowDisappeared() {
+      clearTimeout(this.delayedRowAppear);
       this.hasRowAppeared = false;
     },
   },
diff --git a/app/assets/javascripts/repository/components/tree_content.vue b/app/assets/javascripts/repository/components/tree_content.vue
index ffe8d5531f8..130ebf77361 100644
--- a/app/assets/javascripts/repository/components/tree_content.vue
+++ b/app/assets/javascripts/repository/components/tree_content.vue
@@ -3,7 +3,12 @@ import paginatedTreeQuery from 'shared_queries/repository/paginated_tree.query.g
 import createFlash from '~/flash';
 import glFeatureFlagMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
 import { __ } from '../../locale';
-import { TREE_PAGE_SIZE, TREE_INITIAL_FETCH_COUNT, TREE_PAGE_LIMIT } from '../constants';
+import {
+  TREE_PAGE_SIZE,
+  TREE_INITIAL_FETCH_COUNT,
+  TREE_PAGE_LIMIT,
+  COMMIT_BATCH_SIZE,
+} from '../constants';
 import getRefMixin from '../mixins/get_ref';
 import projectPathQuery from '../queries/project_path.query.graphql';
 import { readmeFile } from '../utils/readme';
@@ -151,11 +156,19 @@ export default {
         .concat(data.trees.pageInfo, data.submodules.pageInfo, data.blobs.pageInfo)
         .find(({ hasNextPage }) => hasNextPage);
     },
-    loadCommitData({ rowNumber = 0, hasCommit } = {}) {
-      if (!this.glFeatures.lazyLoadCommits || hasCommit || isRequested(rowNumber)) {
+    handleRowAppear(rowNumber) {
+      if (!this.glFeatures.lazyLoadCommits || isRequested(rowNumber)) {
         return;
       }
 
+      // Since a user could scroll either up or down, we want to support lazy loading in both directions
+      this.loadCommitData(rowNumber);
+
+      if (rowNumber - COMMIT_BATCH_SIZE >= 0) {
+        this.loadCommitData(rowNumber - COMMIT_BATCH_SIZE);
+      }
+    },
+    loadCommitData(rowNumber) {
       loadCommits(this.projectPath, this.path, this.ref, rowNumber)
         .then(this.setCommitData)
         .catch(() => {});
@@ -182,7 +195,7 @@ export default {
       :has-more="hasShowMore"
       :commits="commits"
       @showMore="handleShowMore"
-      @row-appear="loadCommitData"
+      @row-appear="handleRowAppear"
     />
     <file-preview v-if="readme" :blob="readme" />
   </div>
diff --git a/app/assets/javascripts/repository/constants.js b/app/assets/javascripts/repository/constants.js
index cdc4818e493..d01757d6141 100644
--- a/app/assets/javascripts/repository/constants.js
+++ b/app/assets/javascripts/repository/constants.js
@@ -23,3 +23,5 @@ export const I18N_COMMIT_DATA_FETCH_ERROR = __('An error occurred while fetching
 
 export const PDF_MAX_FILE_SIZE = 10000000; // 10 MB
 export const PDF_MAX_PAGE_LIMIT = 50;
+
+export const ROW_APPEAR_DELAY = 150;
diff --git a/app/assets/javascripts/vue_shared/components/markdown/toolbar.vue b/app/assets/javascripts/vue_shared/components/markdown/toolbar.vue
index 912aa8ce294..f1c293c87f4 100644
--- a/app/assets/javascripts/vue_shared/components/markdown/toolbar.vue
+++ b/app/assets/javascripts/vue_shared/components/markdown/toolbar.vue
@@ -1,18 +1,13 @@
 <script>
 import { GlButton, GlLink, GlLoadingIcon, GlSprintf, GlIcon } from '@gitlab/ui';
-import { isExperimentVariant } from '~/experimentation/utils';
-import InviteMembersTrigger from '~/invite_members/components/invite_members_trigger.vue';
-import { INVITE_MEMBERS_IN_COMMENT } from '~/invite_members/constants';
 
 export default {
-  inviteMembersInComment: INVITE_MEMBERS_IN_COMMENT,
   components: {
     GlButton,
     GlLink,
     GlLoadingIcon,
     GlSprintf,
     GlIcon,
-    InviteMembersTrigger,
   },
   props: {
     markdownDocsPath: {
@@ -34,9 +29,6 @@ export default {
     hasQuickActionsDocsPath() {
       return this.quickActionsDocsPath !== '';
     },
-    inviteCommentEnabled() {
-      return isExperimentVariant(INVITE_MEMBERS_IN_COMMENT, 'invite_member_link');
-    },
   },
 };
 </script>
@@ -67,16 +59,6 @@ export default {
       </template>
     </div>
     <span v-if="canAttachFile" class="uploading-container">
-      <invite-members-trigger
-        v-if="inviteCommentEnabled"
-        classes="gl-mr-3 gl-vertical-align-text-bottom"
-        :display-text="s__('InviteMember|Invite Member')"
-        icon="assignee"
-        variant="link"
-        :track-experiment="$options.inviteMembersInComment"
-        :trigger-source="$options.inviteMembersInComment"
-        data-track-action="comment_invite_click"
-      />
       <span class="uploading-progress-container hide">
         <gl-icon name="media" />
         <span class="attaching-file-message"></span>
diff --git a/app/assets/stylesheets/highlight/common.scss b/app/assets/stylesheets/highlight/common.scss
index fb4266a2f41..97dd7edef13 100644
--- a/app/assets/stylesheets/highlight/common.scss
+++ b/app/assets/stylesheets/highlight/common.scss
@@ -45,12 +45,12 @@
   }
 }
 
-@mixin line-number-hover($color) {
-  background-color: $color;
-  border-color: darken($color, 5%);
+@mixin line-number-hover {
+  background-color: $purple-100;
+  border-color: $purple-200;
 
   a {
-    color: darken($color, 15%);
+    color: $gray-600;
   }
 }
 
diff --git a/app/assets/stylesheets/highlight/themes/dark.scss b/app/assets/stylesheets/highlight/themes/dark.scss
index 2d180f49f97..156f7ec3802 100644
--- a/app/assets/stylesheets/highlight/themes/dark.scss
+++ b/app/assets/stylesheets/highlight/themes/dark.scss
@@ -22,7 +22,6 @@ $dark-highlight-bg: #ffe792;
 $dark-highlight-color: $black;
 $dark-pre-hll-bg: #373b41;
 $dark-hll-bg: #373b41;
-$dark-over-bg: #9f9ab5;
 $dark-expanded-bg: #3e3e3e;
 $dark-coverage: #b3e841;
 $dark-no-coverage: #ff4f33;
@@ -93,7 +92,7 @@ $dark-il: #de935f;
   .file-line-num {
     @include line-number-link($dark-line-num-color);
   }
-  
+
   .line-numbers,
   .diff-line-num {
     background-color: $dark-main-bg;
@@ -171,14 +170,14 @@ $dark-il: #de935f;
     .diff-grid-left:hover,
     .diff-grid-right:hover {
       .diff-line-num:not(.empty-cell) {
-        @include line-number-hover($dark-over-bg);
+        @include line-number-hover;
       }
     }
 
     .diff-line-num {
       &.is-over,
       &.hll:not(.empty-cell).is-over {
-        @include line-number-hover($dark-over-bg);
+        @include line-number-hover;
       }
     }
 
diff --git a/app/assets/stylesheets/highlight/themes/monokai.scss b/app/assets/stylesheets/highlight/themes/monokai.scss
index c0931188cc3..5e259b72442 100644
--- a/app/assets/stylesheets/highlight/themes/monokai.scss
+++ b/app/assets/stylesheets/highlight/themes/monokai.scss
@@ -15,7 +15,6 @@ $monokai-line-empty-bg: #49483e;
 $monokai-line-empty-border: darken($monokai-line-empty-bg, 15%);
 $monokai-diff-border: #808080;
 $monokai-highlight-bg: #ffe792;
-$monokai-over-bg: #9f9ab5;
 $monokai-expanded-bg: #3e3e3e;
 $monokai-coverage: #a6e22e;
 $monokai-no-coverage: #fd971f;
@@ -172,14 +171,14 @@ $monokai-gh: #75715e;
     .diff-grid-left:hover,
     .diff-grid-right:hover {
       .diff-line-num:not(.empty-cell) {
-        @include line-number-hover($monokai-over-bg);
+        @include line-number-hover;
       }
     }
 
     .diff-line-num {
       &.is-over,
       &.hll:not(.empty-cell).is-over {
-        @include line-number-hover($monokai-over-bg);
+        @include line-number-hover;
       }
     }
 
diff --git a/app/assets/stylesheets/highlight/themes/none.scss b/app/assets/stylesheets/highlight/themes/none.scss
index ef7eb244b61..999719685b6 100644
--- a/app/assets/stylesheets/highlight/themes/none.scss
+++ b/app/assets/stylesheets/highlight/themes/none.scss
@@ -43,7 +43,6 @@
   }
 
   // Diff line
-  $none-over-bg: #ded7fc;
   $none-expanded-border: #e0e0e0;
   $none-expanded-bg: #e0e0e0;
 
@@ -69,7 +68,7 @@
     .diff-grid-left:hover,
     .diff-grid-right:hover {
       .diff-line-num:not(.empty-cell) {
-        @include line-number-hover($none-over-bg);
+        @include line-number-hover;
       }
     }
 
@@ -88,7 +87,7 @@
 
       &.is-over,
       &.hll:not(.empty-cell).is-over {
-        @include line-number-hover($none-over-bg);
+        @include line-number-hover;
       }
 
       &.hll:not(.empty-cell) {
diff --git a/app/assets/stylesheets/highlight/themes/solarized-dark.scss b/app/assets/stylesheets/highlight/themes/solarized-dark.scss
index 8f09a178af1..8a20b323332 100644
--- a/app/assets/stylesheets/highlight/themes/solarized-dark.scss
+++ b/app/assets/stylesheets/highlight/themes/solarized-dark.scss
@@ -19,7 +19,6 @@ $solarized-dark-line-color-new: #5a766c;
 $solarized-dark-line-color-old: #7a6c71;
 $solarized-dark-highlight: #094554;
 $solarized-dark-hll-bg: #174652;
-$solarized-dark-over-bg: #9f9ab5;
 $solarized-dark-expanded-bg: #010d10;
 $solarized-dark-coverage: #859900;
 $solarized-dark-no-coverage: #cb4b16;
@@ -151,7 +150,7 @@ $solarized-dark-il: #2aa198;
     .diff-grid-left:hover,
     .diff-grid-right:hover {
       .diff-line-num:not(.empty-cell) {
-        @include line-number-hover($solarized-dark-over-bg);
+        @include line-number-hover;
       }
     }
 
@@ -182,7 +181,7 @@ $solarized-dark-il: #2aa198;
     .diff-line-num {
       &.is-over,
       &.hll:not(.empty-cell).is-over {
-        @include line-number-hover($solarized-dark-over-bg);
+        @include line-number-hover;
       }
     }
 
diff --git a/app/assets/stylesheets/highlight/themes/solarized-light.scss b/app/assets/stylesheets/highlight/themes/solarized-light.scss
index 747cc639f91..1f1b13d0faa 100644
--- a/app/assets/stylesheets/highlight/themes/solarized-light.scss
+++ b/app/assets/stylesheets/highlight/themes/solarized-light.scss
@@ -20,7 +20,6 @@ $solarized-light-line-color-new: #a1a080;
 $solarized-light-line-color-old: #ad9186;
 $solarized-light-highlight: #eee8d5;
 $solarized-light-hll-bg: #ddd8c5;
-$solarized-light-over-bg: #ded7fc;
 $solarized-light-expanded-border: #d2cdbd;
 $solarized-light-expanded-bg: #ece6d4;
 $solarized-light-coverage: #859900;
@@ -171,7 +170,7 @@ $solarized-light-il: #2aa198;
     .diff-grid-left:hover,
     .diff-grid-right:hover {
       .diff-line-num:not(.empty-cell) {
-        @include line-number-hover($solarized-light-over-bg);
+        @include line-number-hover;
       }
     }
 
@@ -190,7 +189,7 @@ $solarized-light-il: #2aa198;
     .diff-line-num {
       &.is-over,
       &.hll:not(.empty-cell).is-over {
-        @include line-number-hover($solarized-light-over-bg);
+        @include line-number-hover;
       }
     }
 
diff --git a/app/assets/stylesheets/highlight/white_base.scss b/app/assets/stylesheets/highlight/white_base.scss
index 86b01926dd7..f13c8bb3891 100644
--- a/app/assets/stylesheets/highlight/white_base.scss
+++ b/app/assets/stylesheets/highlight/white_base.scss
@@ -9,7 +9,6 @@ $white-code-color: $gl-text-color;
 $white-highlight: #fafe3d;
 $white-pre-hll-bg: #f8eec7;
 $white-hll-bg: #f8f8f8;
-$white-over-bg: #ded7fc;
 $white-expanded-border: #e0e0e0;
 $white-expanded-bg: #f7f7f7;
 $white-c: #998;
@@ -131,7 +130,7 @@ pre.code,
   .diff-grid-left:hover,
   .diff-grid-right:hover {
     .diff-line-num:not(.empty-cell):not(.conflict_marker_their):not(.conflict_marker_our) {
-      @include line-number-hover($white-over-bg);
+      @include line-number-hover;
     }
   }
 
@@ -156,7 +155,7 @@ pre.code,
 
     &.is-over,
     &.hll:not(.empty-cell).is-over {
-      @include line-number-hover($white-over-bg);
+      @include line-number-hover;
     }
 
     &.hll:not(.empty-cell) {
diff --git a/app/assets/stylesheets/pages/profile.scss b/app/assets/stylesheets/pages/profile.scss
index af9f10c9a26..a7ed7172f5f 100644
--- a/app/assets/stylesheets/pages/profile.scss
+++ b/app/assets/stylesheets/pages/profile.scss
@@ -329,16 +329,6 @@ table.u2f-registrations {
   }
 }
 
-.email-badge {
-  display: inline;
-  margin-right: $gl-padding / 2;
-
-  .email-badge-email {
-    display: inline;
-    margin-right: $gl-padding / 4;
-  }
-}
-
 .edit-user {
   svg {
     fill: $gl-text-color-secondary;
diff --git a/app/controllers/projects/issues_controller.rb b/app/controllers/projects/issues_controller.rb
index 345e4434f4d..d2d7ecfab6f 100644
--- a/app/controllers/projects/issues_controller.rb
+++ b/app/controllers/projects/issues_controller.rb
@@ -52,15 +52,6 @@ class Projects::IssuesController < Projects::ApplicationController
     push_frontend_feature_flag(:confidential_notes, @project, default_enabled: :yaml)
     push_frontend_feature_flag(:issue_assignees_widget, @project, default_enabled: :yaml)
     push_frontend_feature_flag(:paginated_issue_discussions, @project, default_enabled: :yaml)
-
-    experiment(:invite_members_in_comment, namespace: @project.root_ancestor) do |experiment_instance|
-      experiment_instance.exclude! unless helpers.can_admin_project_member?(@project)
-
-      experiment_instance.use {}
-      experiment_instance.try(:invite_member_link) {}
-
-      experiment_instance.track(:view, property: @project.root_ancestor.id.to_s)
-    end
   end
 
   around_action :allow_gitaly_ref_name_caching, only: [:discussions]
diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index 3cffa9136d6..ccc34e2940e 100644
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -47,15 +47,6 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
     push_frontend_feature_flag(:users_expanding_widgets_usage_data, @project, default_enabled: :yaml)
     push_frontend_feature_flag(:diff_settings_usage_data, default_enabled: :yaml)
     push_frontend_feature_flag(:diff_searching_usage_data, @project, default_enabled: :yaml)
-
-    experiment(:invite_members_in_comment, namespace: @project.root_ancestor) do |experiment_instance|
-      experiment_instance.exclude! unless helpers.can_admin_project_member?(@project)
-
-      experiment_instance.use {}
-      experiment_instance.try(:invite_member_link) {}
-
-      experiment_instance.track(:view, property: @project.root_ancestor.id.to_s)
-    end
   end
 
   before_action do
diff --git a/app/views/projects/mirrors/_regenerate_public_ssh_key_confirm_modal.html.haml b/app/views/projects/mirrors/_regenerate_public_ssh_key_confirm_modal.html.haml
deleted file mode 100644
index e6f3060af3e..00000000000
--- a/app/views/projects/mirrors/_regenerate_public_ssh_key_confirm_modal.html.haml
+++ /dev/null
@@ -1,13 +0,0 @@
-.modal.js-regenerate-public-ssh-key-confirm-modal{ tabindex: -1 }
-  .modal-dialog
-    .modal-content
-      .modal-header
-        %h3.modal-title.page-title
-          Regenerate public SSH key?
-        %button.close.js-cancel{ type: 'button', 'data-dismiss': 'modal', 'aria-label' => _('Close') }
-          %span{ 'aria-hidden': true } &times;
-      .modal-body
-        %p= _('Are you sure you want to regenerate the public key? You will have to update the public key on the remote server before mirroring will work again.')
-      .form-actions.modal-footer
-        = button_tag _('Cancel'), type: 'button', class: 'btn gl-button js-cancel'
-        = button_tag _('Regenerate key'), type: 'button', class: 'btn gl-button btn-inverted btn-warning js-confirm'
diff --git a/app/views/shared/_email_with_badge.html.haml b/app/views/shared/_email_with_badge.html.haml
index 8b9ca966ed6..5d837657943 100644
--- a/app/views/shared/_email_with_badge.html.haml
+++ b/app/views/shared/_email_with_badge.html.haml
@@ -1,8 +1,5 @@
-- css_classes = %w(badge gl-badge)
-- css_classes << (verified ? 'badge-success': 'badge-danger')
+- variant = verified ? :success : :danger
 - text = verified ? _('Verified') : _('Unverified')
 
-.email-badge
-  .email-badge-email= email
-  %div{ class: css_classes }
-    = text
+= email
+= gl_badge_tag text, { variant: variant }, { class: 'gl-ml-3' }
diff --git a/bin/metrics-server b/bin/metrics-server
index 48d3a6402c3..16c98f65f52 100755
--- a/bin/metrics-server
+++ b/bin/metrics-server
@@ -8,8 +8,9 @@ begin
   raise "Required: METRICS_SERVER_TARGET=[sidekiq]" unless target == 'sidekiq'
 
   metrics_dir = ENV["prometheus_multiproc_dir"] || File.absolute_path("tmp/prometheus_multiproc_dir/#{target}")
+  wipe_metrics_dir = Gitlab::Utils.to_boolean(ENV['WIPE_METRICS_DIR']) || false
 
   # Re-raise exceptions in threads on the main thread.
   Thread.abort_on_exception = true
-  MetricsServer.new(target, metrics_dir).start
+  MetricsServer.new(target, metrics_dir, wipe_metrics_dir).start
 end
diff --git a/config/feature_flags/experiment/invite_members_in_comment.yml b/config/feature_flags/experiment/invite_members_in_comment.yml
deleted file mode 100644
index 521574ad71b..00000000000
--- a/config/feature_flags/experiment/invite_members_in_comment.yml
+++ /dev/null
@@ -1,8 +0,0 @@
----
-name: invite_members_in_comment
-introduced_by_url: 'https://gitlab.com/gitlab-org/gitlab/-/merge_requests/51400'
-rollout_issue_url: 'https://gitlab.com/gitlab-org/growth/team-tasks/-/issues/300'
-milestone: '13.10'
-type: experiment
-group: group::expansion
-default_enabled: false
diff --git a/lib/gitlab/process_management.rb b/lib/gitlab/process_management.rb
index 2c2aaadb29a..604b6129648 100644
--- a/lib/gitlab/process_management.rb
+++ b/lib/gitlab/process_management.rb
@@ -70,11 +70,17 @@ module Gitlab
     end
 
     def self.process_alive?(pid)
+      return false if pid.nil?
+
       # Signal 0 tests whether the process exists and we have access to send signals
       # but is otherwise a noop (doesn't actually send a signal to the process)
       signal(pid, 0)
     end
 
+    def self.process_died?(pid)
+      !process_alive?(pid)
+    end
+
     def self.write_pid(path)
       File.open(path, 'w') do |handle|
         handle.write(Process.pid.to_s)
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index a4518e914ec..323287837f3 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -4619,9 +4619,6 @@ msgstr ""
 msgid "Are you sure you want to re-deploy this environment?"
 msgstr ""
 
-msgid "Are you sure you want to regenerate the public key? You will have to update the public key on the remote server before mirroring will work again."
-msgstr ""
-
 msgid "Are you sure you want to reindex?"
 msgstr ""
 
@@ -19317,9 +19314,6 @@ msgstr ""
 msgid "InviteMember|Add members to this project and start collaborating with your team."
 msgstr ""
 
-msgid "InviteMember|Invite Member"
-msgstr ""
-
 msgid "InviteMember|Invite Members (optional)"
 msgstr ""
 
@@ -28858,9 +28852,6 @@ msgstr ""
 msgid "Regenerate instance ID"
 msgstr ""
 
-msgid "Regenerate key"
-msgstr ""
-
 msgid "Regenerate recovery codes"
 msgstr ""
 
diff --git a/metrics_server/dependencies.rb b/metrics_server/dependencies.rb
index ecfef502feb..80e68b95ed1 100644
--- a/metrics_server/dependencies.rb
+++ b/metrics_server/dependencies.rb
@@ -13,6 +13,7 @@ require 'rack'
 require_relative 'settings_overrides'
 
 require_relative '../lib/gitlab/daemon'
+require_relative '../lib/gitlab/utils'
 require_relative '../lib/gitlab/utils/strong_memoize'
 require_relative '../lib/prometheus/cleanup_multiproc_dir_service'
 require_relative '../lib/gitlab/metrics/prometheus'
diff --git a/metrics_server/metrics_server.rb b/metrics_server/metrics_server.rb
index 09171d8220b..9dc3ba91536 100644
--- a/metrics_server/metrics_server.rb
+++ b/metrics_server/metrics_server.rb
@@ -1,16 +1,17 @@
 # frozen_string_literal: true
 
-require_relative '../config/bundler_setup'
+require_relative '../config/boot'
 
 require_relative 'dependencies'
 
 class MetricsServer # rubocop:disable Gitlab/NamespacedClass
   class << self
-    def spawn(target, gitlab_config: nil)
+    def spawn(target, gitlab_config: nil, wipe_metrics_dir: false)
       cmd = "#{Rails.root}/bin/metrics-server"
       env = {
         'METRICS_SERVER_TARGET' => target,
-        'GITLAB_CONFIG' => gitlab_config
+        'GITLAB_CONFIG' => gitlab_config,
+        'WIPE_METRICS_DIR' => wipe_metrics_dir.to_s
       }
 
       Process.spawn(env, cmd, err: $stderr, out: $stdout).tap do |pid|
@@ -19,9 +20,10 @@ class MetricsServer # rubocop:disable Gitlab/NamespacedClass
     end
   end
 
-  def initialize(target, metrics_dir)
+  def initialize(target, metrics_dir, wipe_metrics_dir)
     @target = target
     @metrics_dir = metrics_dir
+    @wipe_metrics_dir = wipe_metrics_dir
   end
 
   def start
@@ -30,7 +32,7 @@ class MetricsServer # rubocop:disable Gitlab/NamespacedClass
     end
 
     FileUtils.mkdir_p(@metrics_dir, mode: 0700)
-    ::Prometheus::CleanupMultiprocDirService.new.execute
+    ::Prometheus::CleanupMultiprocDirService.new.execute if @wipe_metrics_dir
 
     settings = Settings.monitoring.sidekiq_exporter
     exporter_class = "Gitlab::Metrics::Exporter::#{@target.camelize}Exporter".constantize
diff --git a/qa/qa/service/kubernetes_cluster.rb b/qa/qa/service/kubernetes_cluster.rb
index ec53b9d8163..dafce4acc33 100644
--- a/qa/qa/service/kubernetes_cluster.rb
+++ b/qa/qa/service/kubernetes_cluster.rb
@@ -77,7 +77,7 @@ module QA
         install_ingress
 
         # need to wait since the ingress-nginx service has an initial delay set of 10 seconds
-        sleep 10
+        sleep 12
         ingress_ip = `kubectl get svc --all-namespaces --no-headers=true -l  app.kubernetes.io/name=ingress-nginx -o custom-columns=:'status.loadBalancer.ingress[0].ip' | grep -v 'none'`
         QA::Runtime::Logger.debug "Has ingress address set to: #{ingress_ip}"
         ingress_ip
diff --git a/sidekiq_cluster/cli.rb b/sidekiq_cluster/cli.rb
index 2dbb1e9c7c7..274b7c03e14 100644
--- a/sidekiq_cluster/cli.rb
+++ b/sidekiq_cluster/cli.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require_relative '../config/bundler_setup'
+
 require 'optparse'
 require 'logger'
 require 'time'
@@ -12,6 +14,7 @@ require_relative '../lib/gitlab/sidekiq_config/cli_methods'
 require_relative '../lib/gitlab/sidekiq_config/worker_matcher'
 require_relative '../lib/gitlab/sidekiq_logging/json_formatter'
 require_relative '../lib/gitlab/process_management'
+require_relative '../metrics_server/metrics_server'
 require_relative 'sidekiq_cluster'
 
 module Gitlab
@@ -89,6 +92,8 @@ module Gitlab
           @logger.info("Starting cluster with #{queue_groups.length} processes")
         end
 
+        start_metrics_server(wipe_metrics_dir: true)
+
         @processes = SidekiqCluster.start(
           queue_groups,
           env: @environment,
@@ -154,17 +159,69 @@ module Gitlab
         while @alive
           sleep(@interval)
 
+          if metrics_server_enabled? && ProcessManagement.process_died?(@metrics_server_pid)
+            @logger.warn('Metrics server went away')
+            start_metrics_server(wipe_metrics_dir: false)
+          end
+
           unless ProcessManagement.all_alive?(@processes)
             # If a child process died we'll just terminate the whole cluster. It's up to
             # runit and such to then restart the cluster.
             @logger.info('A worker terminated, shutting down the cluster')
 
+            stop_metrics_server
             ProcessManagement.signal_processes(@processes, :TERM)
             break
           end
         end
       end
 
+      def start_metrics_server(wipe_metrics_dir: false)
+        return unless metrics_server_enabled?
+
+        @logger.info("Starting metrics server on port #{sidekiq_exporter_port}")
+        @metrics_server_pid = MetricsServer.spawn('sidekiq', wipe_metrics_dir: wipe_metrics_dir)
+      end
+
+      def sidekiq_exporter_enabled?
+        ::Settings.monitoring.sidekiq_exporter.enabled
+      rescue Settingslogic::MissingSetting
+        nil
+      end
+
+      def exporter_has_a_unique_port?
+        # In https://gitlab.com/gitlab-org/gitlab/-/issues/345802 we added settings for sidekiq_health_checks.
+        # These settings default to the same values as sidekiq_exporter for backwards compatibility.
+        # If a different port for sidekiq_health_checks has been set up, we know that the
+        # user wants to serve health checks and metrics from different servers.
+        return false if sidekiq_health_check_port.nil? || sidekiq_exporter_port.nil?
+
+        sidekiq_exporter_port != sidekiq_health_check_port
+      end
+
+      def sidekiq_exporter_port
+        ::Settings.monitoring.sidekiq_exporter.port
+      rescue Settingslogic::MissingSetting
+        nil
+      end
+
+      def sidekiq_health_check_port
+        ::Settings.monitoring.sidekiq_health_checks.port
+      rescue Settingslogic::MissingSetting
+        nil
+      end
+
+      def metrics_server_enabled?
+        !@dryrun && sidekiq_exporter_enabled? && exporter_has_a_unique_port?
+      end
+
+      def stop_metrics_server
+        return unless @metrics_server_pid
+
+        @logger.info("Stopping metrics server (PID #{@metrics_server_pid})")
+        ProcessManagement.signal(@metrics_server_pid, :TERM)
+      end
+
       def option_parser
         OptionParser.new do |opt|
           opt.banner = "#{File.basename(__FILE__)} [QUEUE,QUEUE] [QUEUE] ... [OPTIONS]"
diff --git a/sidekiq_cluster/dependencies.rb b/sidekiq_cluster/dependencies.rb
deleted file mode 100644
index 91e91475f15..00000000000
--- a/sidekiq_cluster/dependencies.rb
+++ /dev/null
@@ -1,6 +0,0 @@
-# rubocop:disable Naming/FileName
-# frozen_string_literal: true
-
-require 'shellwords'
-
-# rubocop:enable Naming/FileName
diff --git a/sidekiq_cluster/sidekiq_cluster.rb b/sidekiq_cluster/sidekiq_cluster.rb
index c3aa9e05a09..c5139ab8874 100644
--- a/sidekiq_cluster/sidekiq_cluster.rb
+++ b/sidekiq_cluster/sidekiq_cluster.rb
@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require_relative 'dependencies'
 require_relative '../lib/gitlab/process_management'
 
 module Gitlab
@@ -67,14 +66,19 @@ module Gitlab
         return
       end
 
-      pid = Process.spawn(
-        { 'ENABLE_SIDEKIQ_CLUSTER' => '1',
-          'SIDEKIQ_WORKER_ID' => worker_id.to_s },
-        *cmd,
-        pgroup: true,
-        err: $stderr,
-        out: $stdout
-      )
+      # We need to remove Bundler specific env vars, since otherwise the
+      # child process will think we are passing an alternative Gemfile
+      # and will clear and reset LOAD_PATH.
+      pid = Bundler.with_original_env do
+        Process.spawn(
+          { 'ENABLE_SIDEKIQ_CLUSTER' => '1',
+            'SIDEKIQ_WORKER_ID' => worker_id.to_s },
+          *cmd,
+          pgroup: true,
+          err: $stderr,
+          out: $stdout
+        )
+      end
 
       ProcessManagement.wait_async(pid)
 
diff --git a/spec/commands/metrics_server/metrics_server_spec.rb b/spec/commands/metrics_server/metrics_server_spec.rb
index 4eff9136f2b..7a03ff3fe75 100644
--- a/spec/commands/metrics_server/metrics_server_spec.rb
+++ b/spec/commands/metrics_server/metrics_server_spec.rb
@@ -29,7 +29,7 @@ RSpec.describe 'bin/metrics-server', :aggregate_failures do
 
       config_file.write(YAML.dump(config))
       config_file.close
-      @pid = MetricsServer.spawn('sidekiq', gitlab_config: config_file.path)
+      @pid = MetricsServer.spawn('sidekiq', gitlab_config: config_file.path, wipe_metrics_dir: true)
     end
 
     after do
diff --git a/spec/commands/sidekiq_cluster/cli_spec.rb b/spec/commands/sidekiq_cluster/cli_spec.rb
index f5642c00ca4..c0576608088 100644
--- a/spec/commands/sidekiq_cluster/cli_spec.rb
+++ b/spec/commands/sidekiq_cluster/cli_spec.rb
@@ -12,8 +12,23 @@ RSpec.describe Gitlab::SidekiqCluster::CLI do # rubocop:disable RSpec/FilePath
     { env: 'test', directory: Dir.pwd, max_concurrency: 50, min_concurrency: 0, dryrun: false, timeout: timeout }
   end
 
+  let(:sidekiq_exporter_enabled) { false }
+  let(:sidekiq_exporter_port) { '3807' }
+  let(:sidekiq_health_checks_port) { '3807' }
+
   before do
     stub_env('RAILS_ENV', 'test')
+    stub_config(
+      monitoring: {
+        sidekiq_exporter: {
+          enabled: sidekiq_exporter_enabled,
+          port: sidekiq_exporter_port
+        },
+        sidekiq_health_checks: {
+          port: sidekiq_health_checks_port
+        }
+      }
+    )
   end
 
   describe '#run' do
@@ -241,6 +256,163 @@ RSpec.describe Gitlab::SidekiqCluster::CLI do # rubocop:disable RSpec/FilePath
         end
       end
     end
+
+    context 'metrics server' do
+      context 'starting the server' do
+        context 'without --dryrun' do
+          context 'when there are no sidekiq_health_checks settings set' do
+            before do
+              stub_config(
+                monitoring: {
+                  sidekiq_exporter: {
+                    enabled: true,
+                    port: sidekiq_exporter_port
+                  }
+                }
+              )
+
+              allow(Gitlab::SidekiqCluster).to receive(:start)
+              allow(cli).to receive(:write_pid)
+              allow(cli).to receive(:trap_signals)
+              allow(cli).to receive(:start_loop)
+            end
+
+            it 'does not start a sidekiq metrics server' do
+              expect(MetricsServer).not_to receive(:spawn)
+
+              cli.run(%w(foo))
+            end
+
+            it 'rescues Settingslogic::MissingSetting' do
+              expect { cli.run(%w(foo)) }.not_to raise_error(Settingslogic::MissingSetting)
+            end
+          end
+
+          context 'when the sidekiq_exporter.port setting is not set' do
+            before do
+              stub_config(
+                monitoring: {
+                  sidekiq_exporter: {
+                    enabled: true
+                  },
+                  sidekiq_health_checks: {
+                    port: sidekiq_health_checks_port
+                  }
+                }
+              )
+
+              allow(Gitlab::SidekiqCluster).to receive(:start)
+              allow(cli).to receive(:write_pid)
+              allow(cli).to receive(:trap_signals)
+              allow(cli).to receive(:start_loop)
+            end
+
+            it 'does not start a sidekiq metrics server' do
+              expect(MetricsServer).not_to receive(:spawn)
+
+              cli.run(%w(foo))
+            end
+
+            it 'rescues Settingslogic::MissingSetting' do
+              expect { cli.run(%w(foo)) }.not_to raise_error(Settingslogic::MissingSetting)
+            end
+          end
+
+          context 'when sidekiq_exporter.enabled setting is not set' do
+            before do
+              stub_config(
+                monitoring: {
+                  sidekiq_exporter: {},
+                  sidekiq_health_checks: {
+                    port: sidekiq_health_checks_port
+                  }
+                }
+              )
+
+              allow(Gitlab::SidekiqCluster).to receive(:start)
+              allow(cli).to receive(:write_pid)
+              allow(cli).to receive(:trap_signals)
+              allow(cli).to receive(:start_loop)
+            end
+
+            it 'does not start a sidekiq metrics server' do
+              expect(MetricsServer).not_to receive(:spawn)
+
+              cli.run(%w(foo))
+            end
+          end
+
+          using RSpec::Parameterized::TableSyntax
+
+          where(:sidekiq_exporter_enabled, :sidekiq_exporter_port, :sidekiq_health_checks_port, :start_metrics_server) do
+            true  | '3807' | '3907' | true
+            true  | '3807' | '3807' | false
+            false | '3807' | '3907' | false
+            false | '3807' | '3907' | false
+          end
+
+          with_them do
+            before do
+              allow(Gitlab::SidekiqCluster).to receive(:start)
+              allow(cli).to receive(:write_pid)
+              allow(cli).to receive(:trap_signals)
+              allow(cli).to receive(:start_loop)
+            end
+
+            specify do
+              if start_metrics_server
+                expect(MetricsServer).to receive(:spawn).with('sidekiq', wipe_metrics_dir: true)
+              else
+                expect(MetricsServer).not_to receive(:spawn)
+              end
+
+              cli.run(%w(foo))
+            end
+          end
+        end
+
+        context 'with --dryrun set' do
+          let(:sidekiq_exporter_enabled) { true }
+
+          it 'does not start the server' do
+            expect(MetricsServer).not_to receive(:spawn)
+
+            cli.run(%w(foo --dryrun))
+          end
+        end
+      end
+
+      context 'supervising the server' do
+        let(:sidekiq_exporter_enabled) { true }
+        let(:sidekiq_health_checks_port) { '3907' }
+
+        before do
+          allow(cli).to receive(:sleep).with(a_kind_of(Numeric))
+          allow(MetricsServer).to receive(:spawn).with('sidekiq', wipe_metrics_dir: false).and_return(99)
+          cli.start_metrics_server
+        end
+
+        it 'stops the metrics server when one of the processes has been terminated' do
+          allow(Gitlab::ProcessManagement).to receive(:process_died?).and_return(false)
+          allow(Gitlab::ProcessManagement).to receive(:all_alive?).with(an_instance_of(Array)).and_return(false)
+          allow(Gitlab::ProcessManagement).to receive(:signal_processes).with(an_instance_of(Array), :TERM)
+
+          expect(Process).to receive(:kill).with(:TERM, 99)
+
+          cli.start_loop
+        end
+
+        it 'starts the metrics server when it is down' do
+          allow(Gitlab::ProcessManagement).to receive(:process_died?).and_return(true)
+          allow(Gitlab::ProcessManagement).to receive(:all_alive?).with(an_instance_of(Array)).and_return(false)
+          allow(cli).to receive(:stop_metrics_server)
+
+          expect(MetricsServer).to receive(:spawn).with('sidekiq', wipe_metrics_dir: false)
+
+          cli.start_loop
+        end
+      end
+    end
   end
 
   describe '#write_pid' do
diff --git a/spec/controllers/projects/issues_controller_spec.rb b/spec/controllers/projects/issues_controller_spec.rb
index ce8bbf92cdf..763c3e43e27 100644
--- a/spec/controllers/projects/issues_controller_spec.rb
+++ b/spec/controllers/projects/issues_controller_spec.rb
@@ -201,32 +201,6 @@ RSpec.describe Projects::IssuesController do
       expect(response).to have_gitlab_http_status(:ok)
       expect(json_response['issue_email_participants']).to contain_exactly({ "email" => participants[0].email }, { "email" => participants[1].email })
     end
-
-    context 'with the invite_members_in_comment experiment', :experiment do
-      context 'when user can invite' do
-        before do
-          stub_experiments(invite_members_in_comment: :invite_member_link)
-          project.add_maintainer(user)
-        end
-
-        it 'assigns the candidate experience and tracks the event' do
-          expect(experiment(:invite_members_in_comment)).to track(:view, property: project.root_ancestor.id.to_s)
-            .for(:invite_member_link)
-            .with_context(namespace: project.root_ancestor)
-            .on_next_instance
-
-          get :show, params: { namespace_id: project.namespace, project_id: project, id: issue.iid }
-        end
-      end
-
-      context 'when user can not invite' do
-        it 'does not track the event' do
-          expect(experiment(:invite_members_in_comment)).not_to track(:view)
-
-          get :show, params: { namespace_id: project.namespace, project_id: project, id: issue.iid }
-        end
-      end
-    end
   end
 
   describe 'GET #new' do
diff --git a/spec/controllers/projects/merge_requests_controller_spec.rb b/spec/controllers/projects/merge_requests_controller_spec.rb
index f4a5044c049..36b6df59ef5 100644
--- a/spec/controllers/projects/merge_requests_controller_spec.rb
+++ b/spec/controllers/projects/merge_requests_controller_spec.rb
@@ -42,32 +42,6 @@ RSpec.describe Projects::MergeRequestsController do
       get :show, params: params.merge(extra_params)
     end
 
-    context 'with the invite_members_in_comment experiment', :experiment do
-      context 'when user can invite' do
-        before do
-          stub_experiments(invite_members_in_comment: :invite_member_link)
-          project.add_maintainer(user)
-        end
-
-        it 'assigns the candidate experience and tracks the event' do
-          expect(experiment(:invite_members_in_comment)).to track(:view, property: project.root_ancestor.id.to_s)
-            .for(:invite_member_link)
-            .with_context(namespace: project.root_ancestor)
-            .on_next_instance
-
-          go
-        end
-      end
-
-      context 'when user can not invite' do
-        it 'does not track the event' do
-          expect(experiment(:invite_members_in_comment)).not_to track(:view)
-
-          go
-        end
-      end
-    end
-
     context 'with view param' do
       before do
         go(view: 'parallel')
diff --git a/spec/features/issues/user_invites_from_a_comment_spec.rb b/spec/features/issues/user_invites_from_a_comment_spec.rb
deleted file mode 100644
index 82061f6ed79..00000000000
--- a/spec/features/issues/user_invites_from_a_comment_spec.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-# frozen_string_literal: true
-
-require "spec_helper"
-
-RSpec.describe "User invites from a comment", :js do
-  let_it_be(:project) { create(:project_empty_repo, :public) }
-  let_it_be(:issue) { create(:issue, project: project) }
-  let_it_be(:user) { project.owner }
-
-  before do
-    sign_in(user)
-  end
-
-  it "launches the invite modal from invite link on a comment" do
-    stub_experiments(invite_members_in_comment: :invite_member_link)
-
-    visit project_issue_path(project, issue)
-
-    page.within(".new-note") do
-      click_button 'Invite Member'
-    end
-
-    expect(page).to have_content("You're inviting members to the")
-  end
-end
diff --git a/spec/features/merge_request/user_invites_from_a_comment_spec.rb b/spec/features/merge_request/user_invites_from_a_comment_spec.rb
deleted file mode 100644
index 79865094fd0..00000000000
--- a/spec/features/merge_request/user_invites_from_a_comment_spec.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-# frozen_string_literal: true
-
-require "spec_helper"
-
-RSpec.describe "User invites from a comment", :js do
-  let_it_be(:project) { create(:project, :public, :repository) }
-  let_it_be(:merge_request) { create(:merge_request, source_project: project) }
-  let_it_be(:user) { project.owner }
-
-  before do
-    sign_in(user)
-  end
-
-  it "launches the invite modal from invite link on a comment" do
-    stub_experiments(invite_members_in_comment: :invite_member_link)
-
-    visit project_merge_request_path(project, merge_request)
-
-    page.within(".new-note") do
-      click_button 'Invite Member'
-    end
-
-    expect(page).to have_content("You're inviting members to the")
-  end
-end
diff --git a/spec/frontend/environments/enable_review_app_modal_spec.js b/spec/frontend/environments/enable_review_app_modal_spec.js
index 9a3f13f19d5..17ae10a2884 100644
--- a/spec/frontend/environments/enable_review_app_modal_spec.js
+++ b/spec/frontend/environments/enable_review_app_modal_spec.js
@@ -1,10 +1,12 @@
 import { shallowMount } from '@vue/test-utils';
+import { GlModal } from '@gitlab/ui';
 import { extendedWrapper } from 'helpers/vue_test_utils_helper';
 import EnableReviewAppButton from '~/environments/components/enable_review_app_modal.vue';
 import ModalCopyButton from '~/vue_shared/components/modal_copy_button.vue';
 
 describe('Enable Review App Button', () => {
   let wrapper;
+  let modal;
 
   afterEach(() => {
     wrapper.destroy();
@@ -16,12 +18,15 @@ describe('Enable Review App Button', () => {
         shallowMount(EnableReviewAppButton, {
           propsData: {
             modalId: 'fake-id',
+            visible: true,
           },
           provide: {
             defaultBranchName: 'main',
           },
         }),
       );
+
+      modal = wrapper.findComponent(GlModal);
     });
 
     it('renders the defaultBranchName copy', () => {
@@ -32,5 +37,15 @@ describe('Enable Review App Button', () => {
     it('renders the copyToClipboard button', () => {
       expect(wrapper.findComponent(ModalCopyButton).exists()).toBe(true);
     });
+
+    it('emits change events from the modal up', () => {
+      modal.vm.$emit('change', false);
+
+      expect(wrapper.emitted('change')).toEqual([[false]]);
+    });
+
+    it('passes visible to the modal', () => {
+      expect(modal.props('visible')).toBe(true);
+    });
   });
 });
diff --git a/spec/frontend/environments/new_environments_app_spec.js b/spec/frontend/environments/new_environments_app_spec.js
index 0ad8e8f442c..c4613bfe182 100644
--- a/spec/frontend/environments/new_environments_app_spec.js
+++ b/spec/frontend/environments/new_environments_app_spec.js
@@ -1,8 +1,9 @@
 import Vue from 'vue';
 import VueApollo from 'vue-apollo';
-import { mount } from '@vue/test-utils';
+import { mountExtended } from 'helpers/vue_test_utils_helper';
 import createMockApollo from 'helpers/mock_apollo_helper';
 import waitForPromises from 'helpers/wait_for_promises';
+import { s__ } from '~/locale';
 import EnvironmentsApp from '~/environments/components/new_environments_app.vue';
 import EnvironmentsFolder from '~/environments/components/new_environment_folder.vue';
 import { resolvedEnvironmentsApp, resolvedFolder } from './graphql/mock_data';
@@ -22,7 +23,16 @@ describe('~/environments/components/new_environments_app.vue', () => {
     return createMockApollo([], mockResolvers);
   };
 
-  const createWrapper = (apolloProvider) => mount(EnvironmentsApp, { apolloProvider });
+  const createWrapper = ({ provide = {}, apolloProvider } = {}) =>
+    mountExtended(EnvironmentsApp, {
+      provide: {
+        newEnvironmentPath: '/environments/new',
+        canCreateEnvironment: true,
+        defaultBranchName: 'main',
+        ...provide,
+      },
+      apolloProvider,
+    });
 
   beforeEach(() => {
     environmentAppMock = jest.fn();
@@ -37,7 +47,7 @@ describe('~/environments/components/new_environments_app.vue', () => {
     environmentAppMock.mockReturnValue(resolvedEnvironmentsApp);
     environmentFolderMock.mockReturnValue(resolvedFolder);
     const apolloProvider = createApolloProvider();
-    wrapper = createWrapper(apolloProvider);
+    wrapper = createWrapper({ apolloProvider });
 
     await waitForPromises();
     await Vue.nextTick();
@@ -47,4 +57,66 @@ describe('~/environments/components/new_environments_app.vue', () => {
     expect(text).toContainEqual(expect.stringMatching('review'));
     expect(text).not.toContainEqual(expect.stringMatching('production'));
   });
+
+  it('should show a button to create a new environment', async () => {
+    environmentAppMock.mockReturnValue(resolvedEnvironmentsApp);
+    environmentFolderMock.mockReturnValue(resolvedFolder);
+    const apolloProvider = createApolloProvider();
+    wrapper = createWrapper({ apolloProvider });
+
+    await waitForPromises();
+    await Vue.nextTick();
+
+    const button = wrapper.findByRole('link', { name: s__('Environments|New environment') });
+    expect(button.attributes('href')).toBe('/environments/new');
+  });
+
+  it('should not show a button to create a new environment if the user has no permissions', async () => {
+    environmentAppMock.mockReturnValue(resolvedEnvironmentsApp);
+    environmentFolderMock.mockReturnValue(resolvedFolder);
+    const apolloProvider = createApolloProvider();
+    wrapper = createWrapper({
+      apolloProvider,
+      provide: { canCreateEnvironment: false, newEnvironmentPath: '' },
+    });
+
+    await waitForPromises();
+    await Vue.nextTick();
+
+    const button = wrapper.findByRole('link', { name: s__('Environments|New environment') });
+    expect(button.exists()).toBe(false);
+  });
+
+  it('should show a button to open the review app modal', async () => {
+    environmentAppMock.mockReturnValue(resolvedEnvironmentsApp);
+    environmentFolderMock.mockReturnValue(resolvedFolder);
+    const apolloProvider = createApolloProvider();
+    wrapper = createWrapper({ apolloProvider });
+
+    await waitForPromises();
+    await Vue.nextTick();
+
+    const button = wrapper.findByRole('button', { name: s__('Environments|Enable review app') });
+    button.trigger('click');
+
+    await Vue.nextTick();
+
+    expect(wrapper.findByText(s__('ReviewApp|Enable Review App')).exists()).toBe(true);
+  });
+
+  it('should not show a button to open the review app modal if review apps are configured', async () => {
+    environmentAppMock.mockReturnValue({
+      ...resolvedEnvironmentsApp,
+      reviewApp: { canSetupReviewApp: false },
+    });
+    environmentFolderMock.mockReturnValue(resolvedFolder);
+    const apolloProvider = createApolloProvider();
+    wrapper = createWrapper({ apolloProvider });
+
+    await waitForPromises();
+    await Vue.nextTick();
+
+    const button = wrapper.findByRole('button', { name: s__('Environments|Enable review app') });
+    expect(button.exists()).toBe(false);
+  });
 });
diff --git a/spec/frontend/invite_members/components/invite_members_modal_spec.js b/spec/frontend/invite_members/components/invite_members_modal_spec.js
index f3cad3fc066..e190ddf243e 100644
--- a/spec/frontend/invite_members/components/invite_members_modal_spec.js
+++ b/spec/frontend/invite_members/components/invite_members_modal_spec.js
@@ -17,7 +17,6 @@ import InviteMembersModal from '~/invite_members/components/invite_members_modal
 import ModalConfetti from '~/invite_members/components/confetti.vue';
 import MembersTokenSelect from '~/invite_members/components/members_token_select.vue';
 import {
-  INVITE_MEMBERS_IN_COMMENT,
   INVITE_MEMBERS_FOR_TASK,
   CANCEL_BUTTON_TEXT,
   INVITE_BUTTON_TEXT,
@@ -746,7 +745,6 @@ describe('InviteMembersModal', () => {
           wrapper.vm.$toast = { show: jest.fn() };
           jest.spyOn(Api, 'inviteGroupMembersByEmail').mockResolvedValue({ data: postData });
           jest.spyOn(Api, 'addGroupMembersByUserId').mockResolvedValue({ data: postData });
-          jest.spyOn(wrapper.vm, 'trackInvite');
         });
 
         describe('when triggered from regular mounting', () => {
@@ -864,31 +862,6 @@ describe('InviteMembersModal', () => {
         jest.spyOn(Api, 'inviteGroupMembersByEmail').mockResolvedValue({});
       });
 
-      it('tracks the invite', () => {
-        eventHub.$emit('openModal', { inviteeType: 'members', source: INVITE_MEMBERS_IN_COMMENT });
-
-        clickInviteButton();
-
-        expect(ExperimentTracking).toHaveBeenCalledWith(INVITE_MEMBERS_IN_COMMENT);
-        expect(ExperimentTracking.prototype.event).toHaveBeenCalledWith('comment_invite_success');
-      });
-
-      it('does not track invite for unknown source', () => {
-        eventHub.$emit('openModal', { inviteeType: 'members', source: 'unknown' });
-
-        clickInviteButton();
-
-        expect(ExperimentTracking).not.toHaveBeenCalledWith(INVITE_MEMBERS_IN_COMMENT);
-      });
-
-      it('does not track invite undefined source', () => {
-        eventHub.$emit('openModal', { inviteeType: 'members' });
-
-        clickInviteButton();
-
-        expect(ExperimentTracking).not.toHaveBeenCalledWith(INVITE_MEMBERS_IN_COMMENT);
-      });
-
       it('tracks the view for learn_gitlab source', () => {
         eventHub.$emit('openModal', { inviteeType: 'members', source: LEARN_GITLAB });
 
diff --git a/spec/frontend/invite_members/components/invite_members_trigger_spec.js b/spec/frontend/invite_members/components/invite_members_trigger_spec.js
index 3fce23f854c..429b6fad24a 100644
--- a/spec/frontend/invite_members/components/invite_members_trigger_spec.js
+++ b/spec/frontend/invite_members/components/invite_members_trigger_spec.js
@@ -1,6 +1,5 @@
 import { GlButton, GlLink, GlIcon } from '@gitlab/ui';
 import { shallowMount } from '@vue/test-utils';
-import ExperimentTracking from '~/experimentation/experiment_tracking';
 import InviteMembersTrigger from '~/invite_members/components/invite_members_trigger.vue';
 import eventHub from '~/invite_members/event_hub';
 import { TRIGGER_ELEMENT_BUTTON, TRIGGER_ELEMENT_SIDE_NAV } from '~/invite_members/constants';
@@ -79,19 +78,6 @@ describe.each(triggerItems)('with triggerElement as %s', (triggerItem) => {
   });
 
   describe('tracking', () => {
-    it('tracks on mounting', () => {
-      createComponent({ trackExperiment: '_track_experiment_' });
-
-      expect(ExperimentTracking).toHaveBeenCalledWith('_track_experiment_');
-      expect(ExperimentTracking.prototype.event).toHaveBeenCalledWith('comment_invite_shown');
-    });
-
-    it('does not track on mounting', () => {
-      createComponent();
-
-      expect(ExperimentTracking).not.toHaveBeenCalledWith('_track_experiment_');
-    });
-
     it('does not add tracking attributes', () => {
       createComponent();
 
diff --git a/spec/frontend/repository/commits_service_spec.js b/spec/frontend/repository/commits_service_spec.js
index d924974aede..697fa7c4fd1 100644
--- a/spec/frontend/repository/commits_service_spec.js
+++ b/spec/frontend/repository/commits_service_spec.js
@@ -52,13 +52,6 @@ describe('commits service', () => {
     expect(axios.get.mock.calls.length).toEqual(1);
   });
 
-  it('calls axios get twice if an offset is larger than 25', async () => {
-    await requestCommits(100);
-
-    expect(axios.get.mock.calls[0][1]).toEqual({ params: { format: 'json', offset: 75 } });
-    expect(axios.get.mock.calls[1][1]).toEqual({ params: { format: 'json', offset: 100 } });
-  });
-
   it('updates the list of requested offsets', async () => {
     await requestCommits(200);
 
diff --git a/spec/frontend/repository/components/table/row_spec.js b/spec/frontend/repository/components/table/row_spec.js
index 76e9f7da011..7f59dbfe0d1 100644
--- a/spec/frontend/repository/components/table/row_spec.js
+++ b/spec/frontend/repository/components/table/row_spec.js
@@ -4,6 +4,7 @@ import { createMockDirective, getBinding } from 'helpers/vue_mock_directive';
 import TableRow from '~/repository/components/table/row.vue';
 import FileIcon from '~/vue_shared/components/file_icon.vue';
 import { FILE_SYMLINK_MODE } from '~/vue_shared/constants';
+import { ROW_APPEAR_DELAY } from '~/repository/constants';
 
 const COMMIT_MOCK = { lockLabel: 'Locked by Root', committedDate: '2019-01-01' };
 
@@ -17,12 +18,12 @@ function factory(propsData = {}) {
 
   vm = shallowMount(TableRow, {
     propsData: {
+      commitInfo: COMMIT_MOCK,
       ...propsData,
       name: propsData.path,
       projectPath: 'gitlab-org/gitlab-ce',
       url: `https://test.com`,
       totalEntries: 10,
-      commitInfo: COMMIT_MOCK,
       rowNumber: 123,
     },
     directives: {
@@ -251,6 +252,8 @@ describe('Repository table row component', () => {
   });
 
   describe('row visibility', () => {
+    beforeAll(() => jest.useFakeTimers());
+
     beforeEach(() => {
       factory({
         id: '1',
@@ -258,18 +261,20 @@ describe('Repository table row component', () => {
         path: 'test',
         type: 'tree',
         currentPath: '/',
+        commitInfo: null,
       });
     });
-    it('emits a `row-appear` event', () => {
+
+    afterAll(() => jest.useRealTimers());
+
+    it('emits a `row-appear` event', async () => {
       findIntersectionObserver().vm.$emit('appear');
-      expect(vm.emitted('row-appear')).toEqual([
-        [
-          {
-            hasCommit: true,
-            rowNumber: 123,
-          },
-        ],
-      ]);
+
+      jest.runAllTimers();
+
+      expect(setTimeout).toHaveBeenCalledTimes(1);
+      expect(setTimeout).toHaveBeenLastCalledWith(expect.any(Function), ROW_APPEAR_DELAY);
+      expect(vm.emitted('row-appear')).toEqual([[123]]);
     });
   });
 });
diff --git a/spec/frontend/repository/components/tree_content_spec.js b/spec/frontend/repository/components/tree_content_spec.js
index bc12577fa8e..9c5d07eede3 100644
--- a/spec/frontend/repository/components/tree_content_spec.js
+++ b/spec/frontend/repository/components/tree_content_spec.js
@@ -190,14 +190,28 @@ describe('Repository table component', () => {
     });
   });
 
-  it('loads commit data when row-appear event is emitted', () => {
+  describe('commit data', () => {
     const path = 'some/path';
-    const rowNumber = 1;
 
-    factory(path);
-    findFileTable().vm.$emit('row-appear', { hasCommit: false, rowNumber });
+    it('loads commit data for both top and bottom batches when row-appear event is emitted', () => {
+      const rowNumber = 50;
 
-    expect(isRequested).toHaveBeenCalledWith(rowNumber);
-    expect(loadCommits).toHaveBeenCalledWith('', path, '', rowNumber);
+      factory(path);
+      findFileTable().vm.$emit('row-appear', rowNumber);
+
+      expect(isRequested).toHaveBeenCalledWith(rowNumber);
+
+      expect(loadCommits.mock.calls).toEqual([
+        ['', path, '', rowNumber],
+        ['', path, '', rowNumber - 25],
+      ]);
+    });
+
+    it('loads commit data once if rowNumber is zero', () => {
+      factory(path);
+      findFileTable().vm.$emit('row-appear', 0);
+
+      expect(loadCommits.mock.calls).toEqual([['', path, '', 0]]);
+    });
   });
 });
diff --git a/spec/frontend/vue_shared/components/markdown/toolbar_spec.js b/spec/frontend/vue_shared/components/markdown/toolbar_spec.js
index eddc4033a65..8bff85b0bda 100644
--- a/spec/frontend/vue_shared/components/markdown/toolbar_spec.js
+++ b/spec/frontend/vue_shared/components/markdown/toolbar_spec.js
@@ -1,24 +1,17 @@
 import { mount } from '@vue/test-utils';
-import { isExperimentVariant } from '~/experimentation/utils';
-import InviteMembersTrigger from '~/invite_members/components/invite_members_trigger.vue';
-import { INVITE_MEMBERS_IN_COMMENT } from '~/invite_members/constants';
 import Toolbar from '~/vue_shared/components/markdown/toolbar.vue';
 
-jest.mock('~/experimentation/utils', () => ({ isExperimentVariant: jest.fn() }));
-
 describe('toolbar', () => {
   let wrapper;
 
   const createMountedWrapper = (props = {}) => {
     wrapper = mount(Toolbar, {
       propsData: { markdownDocsPath: '', ...props },
-      stubs: { 'invite-members-trigger': true },
     });
   };
 
   afterEach(() => {
     wrapper.destroy();
-    isExperimentVariant.mockReset();
   });
 
   describe('user can attach file', () => {
@@ -40,36 +33,4 @@ describe('toolbar', () => {
       expect(wrapper.vm.$el.querySelector('.uploading-container')).toBeNull();
     });
   });
-
-  describe('user can invite member', () => {
-    const findInviteLink = () => wrapper.find(InviteMembersTrigger);
-
-    beforeEach(() => {
-      isExperimentVariant.mockReturnValue(true);
-      createMountedWrapper();
-    });
-
-    it('should render the invite members trigger', () => {
-      expect(findInviteLink().exists()).toBe(true);
-    });
-
-    it('should have correct props', () => {
-      expect(findInviteLink().props().displayText).toBe('Invite Member');
-      expect(findInviteLink().props().trackExperiment).toBe(INVITE_MEMBERS_IN_COMMENT);
-      expect(findInviteLink().props().triggerSource).toBe(INVITE_MEMBERS_IN_COMMENT);
-    });
-  });
-
-  describe('user can not invite member', () => {
-    const findInviteLink = () => wrapper.find(InviteMembersTrigger);
-
-    beforeEach(() => {
-      isExperimentVariant.mockReturnValue(false);
-      createMountedWrapper();
-    });
-
-    it('should render the invite members trigger', () => {
-      expect(findInviteLink().exists()).toBe(false);
-    });
-  });
 });
diff --git a/spec/lib/gitlab/process_management_spec.rb b/spec/lib/gitlab/process_management_spec.rb
index 71c4acdecb9..4e367e258f2 100644
--- a/spec/lib/gitlab/process_management_spec.rb
+++ b/spec/lib/gitlab/process_management_spec.rb
@@ -78,7 +78,7 @@ RSpec.describe Gitlab::ProcessManagement do
   end
 
   describe '.process_alive?' do
-    it 'returns true if the proces is alive' do
+    it 'returns true if the process is alive' do
       process = Process.pid
 
       expect(described_class.process_alive?(process)).to eq(true)
@@ -89,6 +89,32 @@ RSpec.describe Gitlab::ProcessManagement do
 
       expect(described_class.process_alive?(process)).to eq(false)
     end
+
+    it 'returns false when no pid is given' do
+      process = nil
+
+      expect(described_class.process_alive?(process)).to eq(false)
+    end
+  end
+
+  describe '.process_died?' do
+    it 'returns false if the process is alive' do
+      process = Process.pid
+
+      expect(described_class.process_died?(process)).to eq(false)
+    end
+
+    it 'returns true when a thread was not alive' do
+      process = -2
+
+      expect(described_class.process_died?(process)).to eq(true)
+    end
+
+    it 'returns true when no pid is given' do
+      process = nil
+
+      expect(described_class.process_died?(process)).to eq(true)
+    end
   end
 
   describe '.pids_alive' do
diff --git a/spec/metrics_server/metrics_server_spec.rb b/spec/metrics_server/metrics_server_spec.rb
index 58556d2cf5a..fcd5b911d2a 100644
--- a/spec/metrics_server/metrics_server_spec.rb
+++ b/spec/metrics_server/metrics_server_spec.rb
@@ -12,7 +12,8 @@ RSpec.describe MetricsServer do # rubocop:disable RSpec/FilePath
     let(:env) do
       {
         'METRICS_SERVER_TARGET' => 'sidekiq',
-        'GITLAB_CONFIG' => nil
+        'GITLAB_CONFIG' => nil,
+        'WIPE_METRICS_DIR' => 'false'
       }
     end
 
@@ -32,7 +33,7 @@ RSpec.describe MetricsServer do # rubocop:disable RSpec/FilePath
     let(:metrics_dir) { Dir.mktmpdir }
     let(:settings_double) { double(:settings, sidekiq_exporter: {}) }
 
-    subject(:metrics_server) { described_class.new('fake', metrics_dir)}
+    subject(:metrics_server) { described_class.new('fake', metrics_dir, true)}
 
     before do
       stub_env('prometheus_multiproc_dir', metrics_dir)
@@ -42,6 +43,7 @@ RSpec.describe MetricsServer do # rubocop:disable RSpec/FilePath
     end
 
     after do
+      ::Prometheus::CleanupMultiprocDirService.new.execute
       Dir.rmdir(metrics_dir)
     end
 
@@ -59,10 +61,24 @@ RSpec.describe MetricsServer do # rubocop:disable RSpec/FilePath
       metrics_server.start
     end
 
-    it 'removes any old metrics files' do
-      FileUtils.touch("#{metrics_dir}/remove_this.db")
+    context 'when wipe_metrics_dir is true' do
+      subject(:metrics_server) { described_class.new('fake', metrics_dir, true)}
 
-      expect { metrics_server.start }.to change { Dir.empty?(metrics_dir) }.from(false).to(true)
+      it 'removes any old metrics files' do
+        FileUtils.touch("#{metrics_dir}/remove_this.db")
+
+        expect { metrics_server.start }.to change { Dir.empty?(metrics_dir) }.from(false).to(true)
+      end
+    end
+
+    context 'when wipe_metrics_dir is false' do
+      subject(:metrics_server) { described_class.new('fake', metrics_dir, false)}
+
+      it 'does not remove any old metrics files' do
+        FileUtils.touch("#{metrics_dir}/remove_this.db")
+
+        expect { metrics_server.start }.not_to change { Dir.empty?(metrics_dir) }.from(false)
+      end
     end
 
     it 'starts a metrics server' do
diff --git a/spec/sidekiq_cluster/sidekiq_cluster_spec.rb b/spec/sidekiq_cluster/sidekiq_cluster_spec.rb
index 86b3fc6a48c..c0a919a4aec 100644
--- a/spec/sidekiq_cluster/sidekiq_cluster_spec.rb
+++ b/spec/sidekiq_cluster/sidekiq_cluster_spec.rb
@@ -13,6 +13,8 @@ RSpec.describe Gitlab::SidekiqCluster do # rubocop:disable RSpec/FilePath
         out: $stdout
       }
 
+      expect(Bundler).to receive(:with_original_env).and_call_original.twice
+
       expect(Process).to receive(:spawn).ordered.with({
           "ENABLE_SIDEKIQ_CLUSTER" => "1",
           "SIDEKIQ_WORKER_ID" => "0"
diff --git a/spec/tooling/quality/test_level_spec.rb b/spec/tooling/quality/test_level_spec.rb
index 3348e495732..8a944a473d7 100644
--- a/spec/tooling/quality/test_level_spec.rb
+++ b/spec/tooling/quality/test_level_spec.rb
@@ -28,7 +28,7 @@ RSpec.describe Quality::TestLevel do
     context 'when level is unit' do
       it 'returns a pattern' do
         expect(subject.pattern(:unit))
-          .to eq("spec/{bin,channels,config,db,dependencies,elastic,elastic_integration,experiments,factories,finders,frontend,graphql,haml_lint,helpers,initializers,javascripts,lib,metrics_server,models,policies,presenters,rack_servers,replicators,routing,rubocop,scripts,serializers,services,sidekiq,spam,support_specs,tasks,uploaders,validators,views,workers,tooling}{,/**/}*_spec.rb")
+          .to eq("spec/{bin,channels,config,db,dependencies,elastic,elastic_integration,experiments,factories,finders,frontend,graphql,haml_lint,helpers,initializers,javascripts,lib,metrics_server,models,policies,presenters,rack_servers,replicators,routing,rubocop,scripts,serializers,services,sidekiq,sidekiq_cluster,spam,support_specs,tasks,uploaders,validators,views,workers,tooling}{,/**/}*_spec.rb")
       end
     end
 
@@ -110,7 +110,7 @@ RSpec.describe Quality::TestLevel do
     context 'when level is unit' do
       it 'returns a regexp' do
         expect(subject.regexp(:unit))
-          .to eq(%r{spec/(bin|channels|config|db|dependencies|elastic|elastic_integration|experiments|factories|finders|frontend|graphql|haml_lint|helpers|initializers|javascripts|lib|metrics_server|models|policies|presenters|rack_servers|replicators|routing|rubocop|scripts|serializers|services|sidekiq|spam|support_specs|tasks|uploaders|validators|views|workers|tooling)})
+          .to eq(%r{spec/(bin|channels|config|db|dependencies|elastic|elastic_integration|experiments|factories|finders|frontend|graphql|haml_lint|helpers|initializers|javascripts|lib|metrics_server|models|policies|presenters|rack_servers|replicators|routing|rubocop|scripts|serializers|services|sidekiq|sidekiq_cluster|spam|support_specs|tasks|uploaders|validators|views|workers|tooling)})
       end
     end
 
diff --git a/tooling/quality/test_level.rb b/tooling/quality/test_level.rb
index 3cc1d87eb36..50cbc69beb2 100644
--- a/tooling/quality/test_level.rb
+++ b/tooling/quality/test_level.rb
@@ -45,6 +45,7 @@ module Quality
         serializers
         services
         sidekiq
+        sidekiq_cluster
         spam
         support_specs
         tasks