diff --git a/test/test_refs.rb b/test/test_refs.rb
new file mode 100644
index 0000000..da1907d
--- /dev/null
+++ b/test/test_refs.rb
@@ -0,0 +1,25 @@
+require_relative "helper"
+
+class TestRefs < MiniTest::Test
+  include Checker
+
+  def setup
+    @hash = {}
+    @array =[]
+  end
+  def fill_some
+    @hash[:some] = @array
+    @array[1] = :one
+  end
+
+  def test_one_empty
+    @out = @array << @hash
+    check "-{}"
+  end
+  def test_two_empty
+    @out = @array << @hash
+    @out << @hash
+    check "-&1 {}
+-*1"
+  end
+end