diff --git a/test/units/sprites/engine_test.rb b/test/units/sprites/engine_test.rb
new file mode 100644
index 00000000..a172c518
--- /dev/null
+++ b/test/units/sprites/engine_test.rb
@@ -0,0 +1,43 @@
+require 'test_helper'
+
+class EngineTest < Test::Unit::TestCase
+  
+  def setup
+    sprite_filename = 'squares/ten-by-ten.png'
+    @images = [
+       Compass::SassExtensions::Sprites::Image.new(nil, File.join(sprite_filename), {}) 
+      ]
+    @engine = Compass::SassExtensions::Sprites::Engine.new(100, 100, @images)
+  end
+  
+  
+  test "should have width of 100" do
+    assert_equal 100, @engine.width
+  end
+  
+  test "should have height of 100" do
+    assert_equal 100, @engine.height
+  end
+  
+  test "should have correct images" do
+    assert_equal @images, @engine.images
+  end
+  
+  test "raises Compass::Error when calling save" do
+    begin 
+      @engine.save('foo')
+      assert false, '#save did not raise an exception'
+    rescue Compass::Error
+      assert true
+    end
+  end
+  
+  test "raises Compass::Error when calling construct_sprite" do
+    begin 
+      @engine.construct_sprite
+      assert false, '#construct_sprite did not raise an exception'
+    rescue Compass::Error
+      assert true
+    end
+  end
+end
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