diff --git a/misc/lldb_cruby.py b/misc/lldb_cruby.py
index eafbafdd8a..e954d1be00 100755
--- a/misc/lldb_cruby.py
+++ b/misc/lldb_cruby.py
@@ -3,6 +3,8 @@
 #
 # Usage: run `command script import -r misc/lldb_cruby.py` on LLDB
 #
+# Test: misc/test_lldb_cruby.rb
+#
 
 import lldb
 import commands
diff --git a/misc/test_lldb_cruby.rb b/misc/test_lldb_cruby.rb
new file mode 100644
index 0000000000..4d1cc499f5
--- /dev/null
+++ b/misc/test_lldb_cruby.rb
@@ -0,0 +1,36 @@
+#!/usr/bin/env ruby
+require 'open3'
+require 'tempfile'
+require 'test/unit'
+
+class TestLLDBInit < Test::Unit::TestCase
+  def assert_rp(expr, pattern, message=nil)
+    Tempfile.create('lldb') do |tf|
+      tf.puts <<eom
+target create ./miniruby
+command script import -r misc/lldb_cruby.py
+b rb_p
+run -e'p #{expr}'
+rp obj
+eom
+      tf.flush
+      o, s = Open3.capture2('lldb', '-b', '-s', tf.path)
+      assert_true s.success?, message
+      assert_match /^\(lldb\) rp obj\n#{pattern}/, o, message
+    end
+  end
+
+  def test_rp_object
+    assert_rp 'Object.new', 'T_OBJECT'
+  end
+
+  def test_rp_symbol
+    assert_rp ':abcde', /immediate\(\h+\)/
+  end
+
+  def test_rp_string
+    assert_rp '"abc"', /\(char \[\d+\]\) ary = "abc"/
+    assert_rp "\"\u3042\"", /\(char \[\d+\]\) ary = "\u3042"/
+    assert_rp '"' + "\u3042"*10 + '"', /\(RString::\(anonymous struct\)\) heap = \{/
+  end
+end