diff --git a/spec/lib/factory_burgers/builder_spec.rb b/spec/lib/factory_burgers/builder_spec.rb
new file mode 100644
index 0000000..69ea4d9
--- /dev/null
+++ b/spec/lib/factory_burgers/builder_spec.rb
@@ -0,0 +1,46 @@
+require "spec_helper"
+
+describe FactoryBurgers::Builder do
+  let(:builder) { FactoryBurgers::Builder.new }
+
+  describe "build" do
+    it "builds a resource" do
+      user = builder.build(:user, [], {}, nil)
+      expect(user).to be_persisted
+    end
+
+    it "can use a trait" do
+      user = builder.build(:user, [:silly], {}, nil)
+      expect(user.name.last).to eq("?")
+    end
+
+    it "can override attributes" do
+      user = builder.build(:user, [], {name: "Sir Regynald J Bubblesworth"}, nil)
+      expect(user.name).to eq("Sir Regynald J Bubblesworth")
+    end
+
+    # This is currently borked
+    skip "specifying an owner" do
+      context "when the owner is a belongs_to association" do
+        it "sets the resource's owner" do
+          group = Group.create!
+          user = builder.build(:user, [], {name: "Sir Regynald J Bubblesworth"}, group)
+        end
+      end
+
+      context "when the owner is a has_one association" do
+        it "sets the resource's owner" do
+          profile = UserProfile.create!
+          user = builder.build(:user, [], {name: "Sir Regynald J Bubblesworth"}, profile)
+        end
+      end
+
+      context "when the owner is a has_many association" do
+        it "sets the resource's owner" do
+          post = create :post
+          user = builder.build(:user, [], {name: "Sir Regynald J Bubblesworth"}, post)
+        end
+      end
+    end
+  end
+end