diff --git a/app/assets/images/ci_favicons/dev/favicon_status_canceled.ico b/app/assets/images/ci_favicons/dev/favicon_status_canceled.ico
new file mode 100644
index 00000000000..4af3582b60d
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_canceled.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_created.ico b/app/assets/images/ci_favicons/dev/favicon_status_created.ico
new file mode 100644
index 00000000000..13639da2e8a
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_created.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_failed.ico b/app/assets/images/ci_favicons/dev/favicon_status_failed.ico
new file mode 100644
index 00000000000..5f0e711b104
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_failed.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_manual.ico b/app/assets/images/ci_favicons/dev/favicon_status_manual.ico
new file mode 100644
index 00000000000..8b1168a1267
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_manual.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_not_found.ico b/app/assets/images/ci_favicons/dev/favicon_status_not_found.ico
new file mode 100644
index 00000000000..ed19b69e1c5
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_not_found.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_pending.ico b/app/assets/images/ci_favicons/dev/favicon_status_pending.ico
new file mode 100644
index 00000000000..5dfefd4cc5a
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_pending.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_running.ico b/app/assets/images/ci_favicons/dev/favicon_status_running.ico
new file mode 100644
index 00000000000..a41539c0e3e
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_running.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_skipped.ico b/app/assets/images/ci_favicons/dev/favicon_status_skipped.ico
new file mode 100644
index 00000000000..2c1ae552b93
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_skipped.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_success.ico b/app/assets/images/ci_favicons/dev/favicon_status_success.ico
new file mode 100644
index 00000000000..70f0ca61eca
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_success.ico differ
diff --git a/app/assets/images/ci_favicons/dev/favicon_status_warning.ico b/app/assets/images/ci_favicons/dev/favicon_status_warning.ico
new file mode 100644
index 00000000000..db289e03eb1
Binary files /dev/null and b/app/assets/images/ci_favicons/dev/favicon_status_warning.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_canceled.ico b/app/assets/images/ci_favicons/favicon_status_canceled.ico
old mode 100755
new mode 100644
index 5a19458f2a2..23adcffff50
Binary files a/app/assets/images/ci_favicons/favicon_status_canceled.ico and b/app/assets/images/ci_favicons/favicon_status_canceled.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_created.ico b/app/assets/images/ci_favicons/favicon_status_created.ico
old mode 100755
new mode 100644
index 4dca9640cb3..f9d93b390d8
Binary files a/app/assets/images/ci_favicons/favicon_status_created.ico and b/app/assets/images/ci_favicons/favicon_status_created.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_failed.ico b/app/assets/images/ci_favicons/favicon_status_failed.ico
old mode 100755
new mode 100644
index c961ff9a69b..28a22ebf724
Binary files a/app/assets/images/ci_favicons/favicon_status_failed.ico and b/app/assets/images/ci_favicons/favicon_status_failed.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_manual.ico b/app/assets/images/ci_favicons/favicon_status_manual.ico
old mode 100755
new mode 100644
index 5fbbc99ea7c..dbbf1abf30c
Binary files a/app/assets/images/ci_favicons/favicon_status_manual.ico and b/app/assets/images/ci_favicons/favicon_status_manual.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_not_found.ico b/app/assets/images/ci_favicons/favicon_status_not_found.ico
old mode 100755
new mode 100644
index 21afa9c72e6..49b9b232dd1
Binary files a/app/assets/images/ci_favicons/favicon_status_not_found.ico and b/app/assets/images/ci_favicons/favicon_status_not_found.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_pending.ico b/app/assets/images/ci_favicons/favicon_status_pending.ico
old mode 100755
new mode 100644
index 8be32dab85a..05962f3f148
Binary files a/app/assets/images/ci_favicons/favicon_status_pending.ico and b/app/assets/images/ci_favicons/favicon_status_pending.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_running.ico b/app/assets/images/ci_favicons/favicon_status_running.ico
old mode 100755
new mode 100644
index f328ff1a5ed..7fa3d4d48d4
Binary files a/app/assets/images/ci_favicons/favicon_status_running.ico and b/app/assets/images/ci_favicons/favicon_status_running.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_skipped.ico b/app/assets/images/ci_favicons/favicon_status_skipped.ico
old mode 100755
new mode 100644
index b4394e1b4af..b0c26b62068
Binary files a/app/assets/images/ci_favicons/favicon_status_skipped.ico and b/app/assets/images/ci_favicons/favicon_status_skipped.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_success.ico b/app/assets/images/ci_favicons/favicon_status_success.ico
old mode 100755
new mode 100644
index 4f436c95242..b150960b5be
Binary files a/app/assets/images/ci_favicons/favicon_status_success.ico and b/app/assets/images/ci_favicons/favicon_status_success.ico differ
diff --git a/app/assets/images/ci_favicons/favicon_status_warning.ico b/app/assets/images/ci_favicons/favicon_status_warning.ico
old mode 100755
new mode 100644
index 805cc20cdec..7e71d71684d
Binary files a/app/assets/images/ci_favicons/favicon_status_warning.ico and b/app/assets/images/ci_favicons/favicon_status_warning.ico differ
diff --git a/app/serializers/status_entity.rb b/app/serializers/status_entity.rb
index 944472f3e51..188c3747f18 100644
--- a/app/serializers/status_entity.rb
+++ b/app/serializers/status_entity.rb
@@ -7,6 +7,9 @@ class StatusEntity < Grape::Entity
   expose :details_path
 
   expose :favicon do |status|
-    ActionController::Base.helpers.image_path(File.join('ci_favicons', "#{status.favicon}.ico"))
+    dir = 'ci_favicons'
+    dir = File.join(dir, 'dev') if Rails.env.development?
+
+    ActionController::Base.helpers.image_path(File.join(dir, "#{status.favicon}.ico"))
   end
 end
diff --git a/changelogs/unreleased/add-tanuki-ci-status-favicons.yml b/changelogs/unreleased/add-tanuki-ci-status-favicons.yml
new file mode 100644
index 00000000000..b60ad81947a
--- /dev/null
+++ b/changelogs/unreleased/add-tanuki-ci-status-favicons.yml
@@ -0,0 +1,4 @@
+---
+title: Updated CI status favicons to include the tanuki
+merge_request: 10923
+author:
diff --git a/spec/serializers/status_entity_spec.rb b/spec/serializers/status_entity_spec.rb
index c94902dbab8..3964b998084 100644
--- a/spec/serializers/status_entity_spec.rb
+++ b/spec/serializers/status_entity_spec.rb
@@ -18,6 +18,12 @@ describe StatusEntity do
     it 'contains status details' do
       expect(subject).to include :text, :icon, :favicon, :label, :group
       expect(subject).to include :has_details, :details_path
+      expect(subject[:favicon]).to eq('/assets/ci_favicons/favicon_status_success.ico')
+    end
+
+    it 'contains a dev namespaced favicon if dev env' do
+      allow(Rails.env).to receive(:development?) { true }
+      expect(entity.as_json[:favicon]).to eq('/assets/ci_favicons/dev/favicon_status_success.ico')
     end
   end
 end