diff --git a/plinth/modules/mediawiki/tests/test_functional.py b/plinth/modules/mediawiki/tests/test_functional.py
index a01d0faeb..149c90ce9 100644
--- a/plinth/modules/mediawiki/tests/test_functional.py
+++ b/plinth/modules/mediawiki/tests/test_functional.py
@@ -70,8 +70,9 @@ class TestMediawikiApp(functional.BaseAppTests):
 
     def test_upload_images(self, session_browser, login):
         """Test uploading an image."""
-        _upload_image(session_browser, 'admin', 'whatever123', 'noise.png')
-        assert _image_exists(session_browser, 'Noise.png')
+        _upload_image(session_browser, 'admin', 'whatever123',
+                      'freedombox-logo-250px.png')
+        assert _image_exists(session_browser, 'Freedombox-logo-250px.png')
 
     def test_upload_svg_image(self, session_browser, login):
         """Test uploading an SVG image."""
@@ -81,20 +82,22 @@ class TestMediawikiApp(functional.BaseAppTests):
 
     def test_backup_restore(self, session_browser, login):
         """Test backup and restore of pages and images."""
-        if not _image_exists(session_browser, 'Noise.png'):
-            _upload_image(session_browser, 'admin', 'whatever123', 'Noise.png')
+        if not _image_exists(session_browser, 'Freedombox-logo-250px.png'):
+            _upload_image(session_browser, 'admin', 'whatever123',
+                          'freedombox-logo-250px.png')
 
         functional.backup_create(session_browser, 'mediawiki',
                                  'test_mediawiki')
 
         _enable_public_registrations(session_browser)
-        _delete_image(session_browser, 'admin', 'whatever123', 'Noise.png')
+        _delete_image(session_browser, 'admin', 'whatever123',
+                      'Freedombox-logo-250px.png')
         _delete_main_page(session_browser, 'admin', 'whatever123')
         functional.backup_restore(session_browser, 'mediawiki',
                                   'test_mediawiki')
 
         assert _has_main_page(session_browser)
-        assert _image_exists(session_browser, 'Noise.png')
+        assert _image_exists(session_browser, 'Freedombox-logo-250px.png')
         _verify_create_account_link(session_browser)
 
     def test_uninstall(self, session_browser):
diff --git a/static/themes/default/css/main.css b/static/themes/default/css/main.css
index 4d199d2e9..0b39cd9aa 100644
--- a/static/themes/default/css/main.css
+++ b/static/themes/default/css/main.css
@@ -183,19 +183,6 @@ body {
     padding-top: 6rem;
     position: relative;
     font-family: Lato, sans-serif;
-    background: url('../img/noise.png') var(--background-color);
-}
-
-@media (max-width: 767px) {
-    body {
-        background: none;
-    }
-
-    body.index-page,
-    body.apps-page,
-    body.system-page {
-        background: url('../img/noise.png') var(--background-color);
-    }
 }
 
 .multiple-checkbox li {
@@ -560,7 +547,7 @@ a.menu_link_active {
     display: block;
     line-height: 1.42857143;
     text-align: center;
-    box-shadow: 0 0.1875rem 0.3125rem 0 rgba(0,0,0,0.12);
+    box-shadow: 0 0.1875rem 0.3125rem 0 rgba(0,0,0,0.2);
     width: 10rem;
     padding: 0.5rem 0.25rem;
     margin: 0 0.625rem 1.25rem;
diff --git a/static/themes/default/img/noise.png b/static/themes/default/img/noise.png
deleted file mode 100644
index 4b89438e9..000000000
Binary files a/static/themes/default/img/noise.png and /dev/null differ