diff --git a/spec/c/string_spec.rb b/spec/c/string_spec.rb
index 190e3c3..2d5de66 100644
--- a/spec/c/string_spec.rb
+++ b/spec/c/string_spec.rb
@@ -3,6 +3,10 @@ require 'c_spec_helper'
 describe V8::C::String do
   requires_v8_context
 
+  it 'is a primitive' do
+    expect(V8::C::String.NewFromUtf8('test')).to be_a V8::C::Primitive
+  end
+
   it 'can create new strings' do
     expect(V8::C::String.NewFromUtf8('test')).to be
   end
diff --git a/spec/c/value_spec.rb b/spec/c/value_spec.rb
new file mode 100644
index 0000000..9335d84
--- /dev/null
+++ b/spec/c/value_spec.rb
@@ -0,0 +1,44 @@
+require 'c_spec_helper'
+
+describe V8::C::Value do
+  requires_v8_context
+
+  def to_value(value)
+    object = V8::C::Object.New
+    key = V8::C::String.NewFromUtf8('key')
+
+    object.Set(key, value)
+    object.Get(key)
+  end
+
+  it 'converts strings' do
+    expect(to_value(V8::C::String.NewFromUtf8('value')).Utf8Value).to eq 'value'
+  end
+
+  it 'converts nil' do
+    expect(to_value(nil)).to eq nil
+  end
+
+  it 'converts undefined to nil' do
+    object = V8::C::Object.New
+    key = V8::C::String.NewFromUtf8('key')
+
+    expect(object.Get(key)).to eq nil
+  end
+
+  it 'converts FixNums' do
+    expect(to_value(42)).to eq 42
+  end
+
+  it 'converts booleans' do
+    expect(to_value(true)).to eq true
+    expect(to_value(false)).to eq false
+  end
+
+  it 'converts objects' do
+    object = V8::C::Object.New
+    object.Set(V8::C::String.NewFromUtf8('test'), 1)
+
+    expect(to_value(object)).to eq object
+  end
+end