diff --git a/.rubocop.yml b/.rubocop.yml
index 8192bf0b..7c34ff50 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -6,4 +6,7 @@ AllCops:
   TargetRubyVersion: 2.7
 
 Style/ExplicitBlockArgument:
-  Enabled: false
\ No newline at end of file
+  Enabled: false
+
+Style/MixinUsage:
+  Enabled: false
diff --git a/gd/phlex/sgml/attributes.rb b/gd/phlex/sgml/attributes.rb
new file mode 100644
index 00000000..81f16aec
--- /dev/null
+++ b/gd/phlex/sgml/attributes.rb
@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+include TestHelper
+
+class ToStrable
+	def to_str
+		"foo"
+	end
+end
+
+test "with symbol-keyed hash attributes" do
+	component = build_component_with_template do
+		div data: { name: { first_name: "Joel" } }
+	end
+
+	expect(component.new).to_render %(<div data-name-first-name="Joel"></div>)
+end
+
+test "with string-keyed hash attributes" do
+	component = build_component_with_template do
+		div data: { "name" => { "first_name" => "Joel" } }
+	end
+
+	expect(component.new).to_render %(<div data-name-first_name="Joel"></div>)
+end
+
+test "with an array of symbols and strings" do
+	component = build_component_with_template do
+		div class: ["bg-red-500", :rounded]
+	end
+
+	expect(component.new).to_render %(<div class="bg-red-500 rounded"></div>)
+end
+
+test "with a set of symbols and strings" do
+	component = build_component_with_template do
+		div class: Set.new(["bg-red-500", :rounded])
+	end
+
+	expect(component.new).to_render %(<div class="bg-red-500 rounded"></div>)
+end
+
+test "with a to_str-able object" do
+	component = build_component_with_template do
+		div class: ToStrable.new
+	end
+
+	expect(component.new).to_render %(<div class="foo"></div>)
+end
+
+test "with numeric integer/float" do
+	component = build_component_with_template do
+		input type: "range", min: 0, max: 10, step: 0.5
+	end
+
+	expect(component.new).to_render %(<input type="range" min="0" max="10" step="0.5">)
+end
+
+if RUBY_ENGINE == "ruby"
+	context "with unique tag attributes" do
+		let def component
+			build_component_with_template do
+				div class: SecureRandom.hex
+			end
+		end
+
+		let def report
+			component.call
+
+			MemoryProfiler.report do
+				2.times { component.call }
+			end
+		end
+
+		test "doesn't leak memory" do
+			expect(report.total_retained) == 0
+		end
+	end
+end
diff --git a/gd/support/helper.rb b/gd/support/helper.rb
index 91ec90a9..292d1725 100644
--- a/gd/support/helper.rb
+++ b/gd/support/helper.rb
@@ -1,3 +1,23 @@
 # frozen_string_literal: true
 
 require "phlex"
+require "bundler"
+
+Bundler.require :test
+
+module TestHelper
+	def build_component_with_template(&block)
+		Class.new(Phlex::HTML) { define_method(:template, &block) }
+	end
+end
+
+module ToRender
+	def to_render(expected_output)
+		output = subject.call
+		assert(output == expected_output) { "Expected `#{output.inspect}` to equal `#{expected_output.inspect}`." }
+	end
+end
+
+GreenDots.configure do |config|
+	config.register_matcher ToRender, Phlex::SGML
+end
diff --git a/test/phlex/view/attributes.rb b/test/phlex/view/attributes.rb
deleted file mode 100644
index dfcd217c..00000000
--- a/test/phlex/view/attributes.rb
+++ /dev/null
@@ -1,129 +0,0 @@
-# frozen_string_literal: true
-
-class ToStrable
-	def to_str
-		"foo"
-	end
-end
-
-describe Phlex::HTML do
-	extend ViewHelper
-
-	with "hash attributes" do
-		view do
-			def template
-				div data: { name: { first_name: "Joel" } }
-			end
-		end
-
-		it "flattens the attributes" do
-			expect(output).to be == %(<div data-name-first-name="Joel"></div>)
-		end
-	end
-
-	with "string keyed hash attributes" do
-		view do
-			def template
-				div data: { "name_first_name" => "Joel" }
-			end
-		end
-
-		it "flattens the attributes without dasherizing them" do
-			expect(output).to be == %(<div data-name_first_name="Joel"></div>)
-		end
-	end
-
-	with "an array of string attributes" do
-		view do
-			def template
-				div(class: %w(bg-red-500 rounded))
-			end
-		end
-
-		it "joins the array with a space" do
-			expect(output).to be == %(<div class="bg-red-500 rounded"></div>)
-		end
-	end
-
-	with "an array of symbol attributes" do
-		view do
-			def template
-				div(class: %i(bg-red-500 rounded))
-			end
-		end
-
-		it "joins the array with a space" do
-			expect(output).to be == %(<div class="bg-red-500 rounded"></div>)
-		end
-	end
-
-	with "an array of symbol and string attributes" do
-		view do
-			def template
-				div(class: ["bg-red-500", :rounded])
-			end
-		end
-
-		it "joins the array with a space" do
-			expect(output).to be == %(<div class="bg-red-500 rounded"></div>)
-		end
-	end
-
-	with "a set of string attributes" do
-		view do
-			def template
-				div(class: Set["bg-red-500", "rounded"])
-			end
-		end
-
-		it "joins the array with a space" do
-			expect(output).to be == %(<div class="bg-red-500 rounded"></div>)
-		end
-	end
-
-	with "an object that is not a boolean, String, Symbol, Array, or Hash" do
-		view do
-			def template
-				div(class: ToStrable.new)
-			end
-		end
-
-		it "coerces the object to a string" do
-			expect(output).to be == %(<div class="foo"></div>)
-		end
-	end
-
-	with "an integer and a float" do
-		view do
-			def template
-				input type: "range", min: 0, max: 10, step: 0.5
-			end
-		end
-
-		it "converts the attribute values to strings" do
-			expect(output).to be == %(<input type="range" min="0" max="10" step="0.5">)
-		end
-	end
-
-	if RUBY_ENGINE == "ruby"
-		with "unique tag attributes" do
-			view do
-				def template
-					div class: SecureRandom.hex
-				end
-			end
-
-			let :report do
-				view.new.call
-
-				MemoryProfiler.report do
-					2.times { view.new.call }
-				end
-			end
-
-			it "doesn't leak memory" do
-				expect(report.total_retained).to be == 0
-			end
-		end
-	end
-end