diff --git a/.github/actions/install_solidus/action.yml b/.github/actions/install_solidus/action.yml
index c29bf6fae1a..c3a24a5fee7 100644
--- a/.github/actions/install_solidus/action.yml
+++ b/.github/actions/install_solidus/action.yml
@@ -57,6 +57,15 @@ runs:
       run: |
         cd $RUNNER_TEMP/my_app
         bundle add solidus --path "$(ruby -e"puts File.expand_path ENV['GITHUB_WORKSPACE']")"
+        bundle add solidus_admin --path "$(ruby -e"puts File.expand_path File.join(ENV['GITHUB_WORKSPACE'], 'admin')")"
+
+        # The released `solidus_admin` gem ships a prebuilt `app/assets/builds/solidus_admin/tailwind.css`,
+        # but it's gitignored, so bundling the gem from the checkout above leaves
+        # `solidus_admin/application.css` unable to resolve its `require solidus_admin/tailwind.css`.
+        # The installer only needs the file to exist, not to be styled.
+        mkdir -p "$GITHUB_WORKSPACE/admin/app/assets/builds/solidus_admin"
+        touch "$GITHUB_WORKSPACE/admin/app/assets/builds/solidus_admin/tailwind.css"
+
         unset RAILS_ENV # avoid doing everything on the test environment
 
         # Due to [a bug in `sprockets-rails`](https://github.com/rails/sprockets-rails/pull/546) we need to manually add
diff --git a/admin/app/components/concerns/solidus_admin/slotable_default.rb b/admin/app/components/concerns/solidus_admin/slotable_default.rb
deleted file mode 100644
index b7971ee6e87..00000000000
--- a/admin/app/components/concerns/solidus_admin/slotable_default.rb
+++ /dev/null
@@ -1,42 +0,0 @@
-# frozen_string_literal: true
-
-# ViewComponent v3 provided experimental functionality to define default content for slots
-#  https://viewcomponent.org/guide/slots.html#default_slot_name, but unfortunately
-#  it did not quite work: https://github.com/ViewComponent/view_component/issues/2169.
-# Good news the issue has been resolved, not so good news - it's targeted to be released in v4,
-#  so we have to patch the functionality until we upgrade.
-# The solution has been copied from here https://github.com/ViewComponent/view_component/pull/2291/files.
-
-require "view_component/version"
-if Gem::Version.new(ViewComponent::VERSION::STRING) >= Gem::Version.new("4")
-  raise "The fix is included in ViewComponent v4, please remove this patch #{__FILE__}"
-end
-
-module SolidusAdmin
-  module SlotableDefault
-    def get_slot(slot_name)
-      @__vc_set_slots ||= {}
-      content unless content_evaluated? # ensure content is loaded so slots will be defined
-
-      # If the slot is set, return it
-      return @__vc_set_slots[slot_name] if @__vc_set_slots[slot_name]
-
-      # If there is a default method for the slot, call it
-      if (default_method = registered_slots[slot_name][:default_method])
-        renderable_value = send(default_method)
-        slot = ViewComponent::Slot.new(self)
-
-        if renderable_value.respond_to?(:render_in)
-          slot.__vc_component_instance = renderable_value
-        else
-          slot.__vc_content = renderable_value
-        end
-
-        slot
-      elsif self.class.registered_slots[slot_name][:collection]
-        # If empty slot is a collection, return an empty array
-        []
-      end
-    end
-  end
-end
diff --git a/admin/app/components/solidus_admin/base_component.rb b/admin/app/components/solidus_admin/base_component.rb
index 49d3f27272b..4f40cbaafce 100644
--- a/admin/app/components/solidus_admin/base_component.rb
+++ b/admin/app/components/solidus_admin/base_component.rb
@@ -16,6 +16,15 @@ def icon_tag(name, **attrs)
       render component("ui/icon").new(name:, **attrs)
     end
 
+    # Log missing translations instead of rendering ActionView's
+    # `translation_missing` span, falling back to the English translation.
+    def translate(key = nil, **options)
+      super(key, **options, raise: true)
+    rescue ::I18n::MissingTranslationData
+      missing_translation(self.class.__vc_i18n_key(key, options[:scope]), options.except(:scope))
+    end
+    alias_method :t, :translate
+
     def missing_translation(key, options)
       keys = I18n.normalize_keys(options[:locale] || I18n.locale, key, options[:scope])
 
@@ -28,8 +37,11 @@ def missing_translation(key, options)
       end
     end
 
-    def self.i18n_scope
-      @i18n_scope ||= name.underscore.tr("/", ".")
+    # ViewComponent assigns `virtual_path` in its `inherited` hook, which runs
+    # before an anonymous subclass has been given a name. Resolve it lazily so
+    # that translation scopes also work for dynamically built components.
+    def self.virtual_path
+      @virtual_path ||= name&.underscore
     end
 
     def self.stimulus_id
diff --git a/admin/app/components/solidus_admin/ui/forms/address/component.rb b/admin/app/components/solidus_admin/ui/forms/address/component.rb
index 92c0decc6e6..a1d1801e2c2 100644
--- a/admin/app/components/solidus_admin/ui/forms/address/component.rb
+++ b/admin/app/components/solidus_admin/ui/forms/address/component.rb
@@ -3,8 +3,6 @@
 class SolidusAdmin::UI::Forms::Address::Component < SolidusAdmin::BaseComponent
   DefaultNamedFieldsetNotFound = Class.new(NameError)
 
-  include SolidusAdmin::SlotableDefault
-
   renders_one :fieldset
 
   # @param fieldset [Symbol] use a default named fieldset, component of the same name must be defined
diff --git a/admin/config/initializers/view_component.rb b/admin/config/initializers/view_component.rb
index 8aa5596a4b8..4eb02b35ca5 100644
--- a/admin/config/initializers/view_component.rb
+++ b/admin/config/initializers/view_component.rb
@@ -1,10 +1,7 @@
 # frozen_string_literal: true
 
-Rails.application.config.view_component.capture_compatibility_patch_enabled = true
-
 if Rails.env.development? || Rails.env.test?
   Rails.application.config.view_component.instrumentation_enabled = true
-  Rails.application.config.view_component.use_deprecated_instrumentation_name = false
 
   bold = "\e[1m"
   clear = "\e[0m"
@@ -13,7 +10,7 @@
     next unless args.last[:name]&.starts_with?("SolidusAdmin::")
 
     event = ActiveSupport::Notifications::Event.new(*args)
-    SolidusAdmin::BaseComponent.logger.debug \
+    Rails.logger.debug \
       "  Rendered #{bold}#{event.payload[:name]}#{clear}" \
       " (Duration: #{event.duration.round(1)}ms)"
   end
diff --git a/admin/lib/solidus_admin/engine.rb b/admin/lib/solidus_admin/engine.rb
index 013b1b02803..5181fccaee4 100644
--- a/admin/lib/solidus_admin/engine.rb
+++ b/admin/lib/solidus_admin/engine.rb
@@ -16,10 +16,10 @@ class Engine < ::Rails::Engine
     config.autoload_paths << SolidusAdmin::Engine.root.join("spec/components/previews")
 
     initializer "solidus_admin.view_component" do |app|
-      app.config.view_component.preview_paths << SolidusAdmin::Engine.root.join("spec/components/previews").to_s
+      app.config.view_component.previews.paths << SolidusAdmin::Engine.root.join("spec/components/previews").to_s
 
       app.config.to_prepare do
-        preview_controller_class = app.config.view_component.preview_controller.constantize
+        preview_controller_class = app.config.view_component.previews.controller.constantize
 
         # This is needed to make the preview controller have access to the same
         # set of helpers that are available to the Preview class.
diff --git a/admin/lib/solidus_admin/testing_support/component_helpers.rb b/admin/lib/solidus_admin/testing_support/component_helpers.rb
index f56960561dd..23d10c35942 100644
--- a/admin/lib/solidus_admin/testing_support/component_helpers.rb
+++ b/admin/lib/solidus_admin/testing_support/component_helpers.rb
@@ -3,6 +3,12 @@
 module SolidusAdmin
   module TestingSupport
     module ComponentHelpers
+      # Renders components through the admin's base controller, so that the
+      # admin helpers and layout context are available.
+      def vc_test_controller_class
+        SolidusAdmin::BaseController
+      end
+
       # Mocks a component class with the given definition.
       #
       # @param definition [Proc] the component definition
diff --git a/admin/solidus_admin.gemspec b/admin/solidus_admin.gemspec
index d9290e887de..db4132e7453 100644
--- a/admin/solidus_admin.gemspec
+++ b/admin/solidus_admin.gemspec
@@ -35,5 +35,5 @@ Gem::Specification.new do |s|
   s.add_dependency "solidus_core", "> 4.2"
   s.add_dependency "stimulus-rails", "~> 1.2"
   s.add_dependency "turbo-rails", "~> 2.0"
-  s.add_dependency "view_component", "~> 3.9"
+  s.add_dependency "view_component", "~> 4.0"
 end
diff --git a/admin/spec/components/solidus_admin/base_component_spec.rb b/admin/spec/components/solidus_admin/base_component_spec.rb
index 9c76df23b90..b6b5141a181 100644
--- a/admin/spec/components/solidus_admin/base_component_spec.rb
+++ b/admin/spec/components/solidus_admin/base_component_spec.rb
@@ -46,17 +46,33 @@ def call
   end
 
   describe "missing translations" do
-    it "logs and shows the full chain of keys" do
-      debug_logs = []
+    let(:debug_logs) { [] }
+    let(:component) { mock_component { erb_template "" } }
 
+    before do
       allow(Rails.logger).to receive(:debug) { debug_logs << _1 }
 
-      component = mock_component { erb_template "" }
       render_inline(component)
+    end
+    it "logs and shows the full chain of keys" do
       translation = component.translate("foo.bar.baz")
 
       expect(translation).to eq("translation missing: en.foo.bar.baz")
       expect(debug_logs).to include(%(  [Foo::Component] Missing translation: en.foo.bar.baz))
     end
+
+    it "retries in English when an explicit non-English locale is given" do
+      translation = component.translate("foo.bar.baz", locale: :de)
+
+      expect(translation).to eq("translation missing: en.foo.bar.baz")
+      expect(debug_logs).to include(
+        %(  [Foo::Component] Missing translation: de.foo.bar.baz),
+        %(  [Foo::Component] Missing translation: en.foo.bar.baz)
+      )
+    end
+
+    it "resolves relative keys through `t` as well as `translate`" do
+      expect(component.t("foo.bar.baz")).to eq("translation missing: en.foo.bar.baz")
+    end
   end
 end
diff --git a/admin/spec/spec_helper.rb b/admin/spec/spec_helper.rb
index 0bd65d5102e..ecf6263ca6b 100644
--- a/admin/spec/spec_helper.rb
+++ b/admin/spec/spec_helper.rb
@@ -63,7 +63,6 @@
 Spree::TestingSupport::FactoryBot.add_paths_and_load!
 
 # VIEW COMPONENTS
-Rails.application.config.view_component.test_controller = "SolidusAdmin::BaseController"
 require "view_component/test_helpers"
 require "view_component/system_test_helpers"
 
diff --git a/legacy_promotions/spec/rails_helper.rb b/legacy_promotions/spec/rails_helper.rb
index 47c74b8b888..c598dedd02f 100644
--- a/legacy_promotions/spec/rails_helper.rb
+++ b/legacy_promotions/spec/rails_helper.rb
@@ -56,8 +56,8 @@
 Capybara.enable_aria_label = true
 
 # VIEW COMPONENTS
-Rails.application.config.view_component.test_controller = "SolidusAdmin::BaseController"
 require "view_component/test_helpers"
+require "solidus_admin/testing_support/component_helpers"
 
 RSpec.configure do |config|
   config.fixture_path = File.join(__dir__, "fixtures")
@@ -85,6 +85,7 @@
   end
 
   config.include ViewComponent::TestHelpers, type: :component
+  config.include SolidusAdmin::TestingSupport::ComponentHelpers, type: :component
 
   config.include ActiveJob::TestHelper
   config.include SolidusAdmin::TestingSupport::FeatureHelpers, type: :feature
diff --git a/promotions/lib/components/admin/solidus_promotions/promotion_categories/edit/component.rb b/promotions/lib/components/admin/solidus_promotions/promotion_categories/edit/component.rb
index e76c10cbca4..a16b9149185 100644
--- a/promotions/lib/components/admin/solidus_promotions/promotion_categories/edit/component.rb
+++ b/promotions/lib/components/admin/solidus_promotions/promotion_categories/edit/component.rb
@@ -2,7 +2,6 @@
 
 class SolidusPromotions::PromotionCategories::Edit::Component < SolidusAdmin::BaseComponent
   def initialize(record)
-    super
     @promotion_category = record
   end
 
diff --git a/promotions/lib/components/admin/solidus_promotions/promotion_categories/new/component.rb b/promotions/lib/components/admin/solidus_promotions/promotion_categories/new/component.rb
index 7797374d04b..e61032c3dbe 100644
--- a/promotions/lib/components/admin/solidus_promotions/promotion_categories/new/component.rb
+++ b/promotions/lib/components/admin/solidus_promotions/promotion_categories/new/component.rb
@@ -2,7 +2,6 @@
 
 class SolidusPromotions::PromotionCategories::New::Component < SolidusAdmin::BaseComponent
   def initialize(record)
-    super
     @promotion_category = record
   end
 
diff --git a/storefront/template.rb b/storefront/template.rb
index 7b6e07a03ce..b135037d2a9 100644
--- a/storefront/template.rb
+++ b/storefront/template.rb
@@ -75,7 +75,7 @@
 
   gem "responders"
   gem "solidus_support", ">= 0.12.0"
-  gem "view_component", "~> 3.0"
+  gem "view_component", "~> 4.0"
   gem "tailwindcss-rails", "~> 3.0"
 
   gem_group :test do
diff --git a/storefront/templates/spec/components/link_to_cart_component_spec.rb b/storefront/templates/spec/components/link_to_cart_component_spec.rb
index 9a6d764979c..4cef893868c 100644
--- a/storefront/templates/spec/components/link_to_cart_component_spec.rb
+++ b/storefront/templates/spec/components/link_to_cart_component_spec.rb
@@ -1,10 +1,8 @@
 require "solidus_storefront_spec_helper"
 
 RSpec.describe LinkToCartComponent, type: :component do
-  let(:text) { "" }
-
   let(:link_to_cart_component) do
-    described_class.new(text)
+    described_class.new
   end
 
   let(:current_order) { nil }