diff --git a/middleman-core/lib/middleman-core/core_extensions/data.rb b/middleman-core/lib/middleman-core/core_extensions/data.rb
index 2f2f4280..18057465 100644
--- a/middleman-core/lib/middleman-core/core_extensions/data.rb
+++ b/middleman-core/lib/middleman-core/core_extensions/data.rb
@@ -67,7 +67,7 @@ module Middleman
         # @param [Symbol] name Name of the data, used for namespacing
         # @param [Hash] content The content for this data
         # @return [Hash]
-        Contract Symbol, Hash => Hash
+        Contract Symbol, Or[Hash, Array] => Hash
         def store(name=nil, content=nil)
           @local_sources[name.to_s] = content unless name.nil? || content.nil?
           @local_sources
@@ -148,7 +148,7 @@ module Middleman
         #
         # @param [String, Symbol] path The name of the data namespace
         # @return [Hash, nil]
-        Contract Or[String, Symbol] => Maybe[Hash]
+        Contract Or[String, Symbol] => Maybe[Or[Array, IsA['Middleman::Util::EnhancedHash']]]
         def data_for_path(path)
           response = if store.key?(path.to_s)
             store[path.to_s]
diff --git a/middleman-core/lib/middleman-core/util/data.rb b/middleman-core/lib/middleman-core/util/data.rb
index 2bab7fe0..1a521b8d 100644
--- a/middleman-core/lib/middleman-core/util/data.rb
+++ b/middleman-core/lib/middleman-core/util/data.rb
@@ -29,7 +29,7 @@ module Middleman
       if obj.is_a? ::Array
         obj.map { |e| recursively_enhance(e) }
       elsif obj.is_a? ::Hash
-        ::Hashie::Mash.new(obj)
+        EnhancedHash.new(obj)
       else
         obj
       end
diff --git a/middleman-core/spec/middleman-core/core_extensions/data_spec.rb b/middleman-core/spec/middleman-core/core_extensions/data_spec.rb
index 7c7ddb46..1f0099c9 100644
--- a/middleman-core/spec/middleman-core/core_extensions/data_spec.rb
+++ b/middleman-core/spec/middleman-core/core_extensions/data_spec.rb
@@ -7,6 +7,112 @@ end
 
 describe Middleman::CoreExtensions::Data::DataStore do
 
+  describe "#store" do
+    before :each do
+      @subject = described_class.new instance_double("Middleman::Application"),
+                                     Middleman::CoreExtensions::Data::DATA_FILE_MATCHER
+    end
+
+    context "when given a name and data" do
+      it "adds data at the given name" do
+        @subject.store :foo, { 'bar' => 'baz' }
+        @subject.store :baz, [:wu, :tang]
+
+        expect( @subject.store['foo'] ).to eq({ 'bar' => 'baz' })
+        expect( @subject.store['baz'] ).to match_array [:wu, :tang]
+      end
+
+      it "overwrites previous keys if given the same key" do
+        @subject.store :foo, { 'bar' => 'baz' }
+        @subject.store :foo, [:wu, :tang]
+
+        expect( @subject.store['foo'] ).to match_array [:wu, :tang]
+      end
+    end
+
+    context "when given no args" do
+      it "returns @local_sources instance var" do
+        @subject.instance_variable_set :"@local_sources", { foo: 'bar' }
+        expect( @subject.store ).to eq({ foo: 'bar' })
+      end
+    end
+  end
+
+  describe "#callbacks" do
+    before :each do
+      @subject = described_class.new instance_double("Middleman::Application"),
+                                     Middleman::CoreExtensions::Data::DATA_FILE_MATCHER
+    end
+
+    context "when given a name and proc" do
+      it "adds a callback at the given name" do
+        @subject.callbacks :foo, lambda { "bar" }
+        callback = @subject.instance_variable_get(:@callback_sources)['foo']
+
+        expect( callback.call ).to eq "bar"
+      end
+
+      it "overwrites previous keys if given the same key" do
+        @subject.callbacks :foo, lambda { "bar" }
+        @subject.callbacks :foo, lambda { "baz" }
+        callback = @subject.instance_variable_get(:@callback_sources)['foo']
+
+        expect( callback.call ).to eq "baz"
+      end
+    end
+
+    context "when given no args" do
+      it "returns @callback_sources instance var" do
+        @subject.instance_variable_set :"@callback_sources", { foo: 'bar' }
+        expect( @subject.callbacks ).to eq({ foo: 'bar' })
+      end
+    end
+  end
+
+  describe "#data_for_path" do
+    before :each do
+      @subject = described_class.new instance_double("Middleman::Application"),
+                                     Middleman::CoreExtensions::Data::DATA_FILE_MATCHER
+    end
+
+    context "given path matches local data" do
+      it "returns hash for key" do
+        @subject.store :foo, { 'bar' => 'baz' }
+        expect( @subject.data_for_path(:foo) ).to eq({ 'bar' => 'baz' })
+      end
+
+      it "returns array for key" do
+        @subject.store :foo, [:bar, :baz]
+        expect( @subject.data_for_path(:foo) ).to match_array [:bar, :baz]
+      end
+    end
+
+    context "given path matches callback data" do
+      it "returns value of calback lambda" do
+        @subject.callbacks :foo, lambda { { 'bar' => 'baz' } }
+        @subject.callbacks :wu, lambda { [:tang, :clan] }
+
+        expect( @subject.data_for_path(:foo) ).to eq({ 'bar' => 'baz' })
+        expect( @subject.data_for_path(:wu) ).to match_array [:tang, :clan]
+      end
+    end
+
+    context "given path matches both sources" do
+      it "returns match from local data" do
+        @subject.store :foo, { 'local' => 'data' }
+        @subject.callbacks :foo, lambda { { 'callback' => 'data' } }
+
+        expect( @subject.data_for_path(:foo) ).to eq({ 'local' => 'data' })
+      end
+    end
+
+    context "given path matches no sources" do
+      it "returns nil" do
+        expect( @subject.data_for_path(:missing) ).to be_nil
+      end
+    end
+  end
+
   describe "#key?" do
 
     it "returns true if key included in local_data, local_sources, or callback_sources" do
@@ -38,4 +144,4 @@ describe Middleman::CoreExtensions::Data::DataStore do
 
   end
 
-end
\ No newline at end of file
+end