diff --git a/.travis.yml b/.travis.yml
index 7633c4f..3896190 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,19 @@
 language: ruby
-sudo: false
 rvm:
-  - "1.8.7"
-  - "1.9.3"
-  - "2.0.0"
   - "2.1.1"
 
-install: gem install curses minitest
+before_script: |
+  sudo apt-get install -y tmux libncurses-dev lib32ncurses5-dev
 
+  export GOROOT=~/go1.4
+  export GOPATH=~/go
+
+  mkdir -p ~/go/src/github.com/junegunn
+  ln -s $(pwd) ~/go/src/github.com/junegunn/fzf
+
+  curl https://storage.googleapis.com/golang/go1.4.linux-amd64.tar.gz | tar -xz
+  mv go $GOROOT
+  cd $GOROOT/src && GOARCH=386 ./make.bash
+
+  cd ~/go/src/github.com/junegunn/fzf/src && make install && cd .. &&
+  yes | ./install && tmux
diff --git a/Rakefile b/Rakefile
index 933a039..5bc903d 100644
--- a/Rakefile
+++ b/Rakefile
@@ -2,8 +2,11 @@ require "bundler/gem_tasks"
 require 'rake/testtask'
 
 Rake::TestTask.new(:test) do |test|
-  test.pattern = 'test/**/test_*.rb'
-  test.verbose = true
+  test.pattern = 'test/test_go.rb'
+end
+
+Rake::TestTask.new(:testall) do |test|
+  test.pattern = 'test/test_*.rb'
 end
 
 task :default => :test
diff --git a/src/Makefile b/src/Makefile
index 4610e58..eda0404 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -22,7 +22,7 @@ VERSION    = $(shell fzf/$(BINARY64) --version)
 RELEASE32  = fzf-$(VERSION)-$(GOOS)_386
 RELEASE64  = fzf-$(VERSION)-$(GOOS)_amd64
 
-all: test release
+all: release
 
 release: build
 	cd fzf && \
@@ -30,13 +30,13 @@ release: build
 	cp $(BINARY64) $(RELEASE64) && tar -czf $(RELEASE64).tgz $(RELEASE64) && \
 	rm $(RELEASE32) $(RELEASE64)
 
-build: fzf/$(BINARY32) fzf/$(BINARY64)
+build: test fzf/$(BINARY32) fzf/$(BINARY64)
 
 test:
 	go get
 	go test -v ./...
 
-install: $(BINDIR)/fzf
+install: build $(BINDIR)/fzf
 
 uninstall:
 	rm -f $(BINDIR)/fzf $(BINDIR)/$(BINARY64)
diff --git a/src/terminal.go b/src/terminal.go
index 44796ce..abd7069 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -515,7 +515,8 @@ func (t *Terminal) Loop() {
 				t.rubout("[^[:alnum:]][[:alnum:]]")
 			}
 		case C.CtrlY:
-			t.input = append(append(t.input[:t.cx], t.yanked...), t.input[t.cx:]...)
+			suffix := copySlice(t.input[t.cx:])
+			t.input = append(append(t.input[:t.cx], t.yanked...), suffix...)
 			t.cx += len(t.yanked)
 		case C.Del:
 			t.delChar()
diff --git a/test/test_go.rb b/test/test_go.rb
new file mode 100644
index 0000000..de8fac7
--- /dev/null
+++ b/test/test_go.rb
@@ -0,0 +1,184 @@
+#!/usr/bin/env ruby
+# encoding: utf-8
+
+require 'minitest/autorun'
+
+class Tmux
+  TEMPNAME = '/tmp/fzf-test.txt'
+
+  attr_reader :win
+
+  def initialize shell = 'bash'
+    @win = go("new-window -P -F '#I' 'bash --rcfile ~/.fzf.#{shell}'").first
+  end
+
+  def self.current
+    `tmux display-message -p '#I'`.split($/).first
+  end
+
+  def self.select id
+    system "tmux select-window -t #{id}"
+  end
+
+  def closed?
+    !go("list-window -F '#I'").include?(win)
+  end
+
+  def close timeout = 1
+    send_keys 'C-c', 'C-u', 'C-d'
+    wait(timeout) { closed? }
+  end
+
+  def kill
+    go("kill-window -t #{win} 2> /dev/null")
+  end
+
+  def send_keys *args
+    args = args.map { |a| %{"#{a}"} }.join ' '
+    go("send-keys -t #{win} #{args}")
+  end
+
+  def capture
+    go("capture-pane -t #{win} \\; save-buffer #{TEMPNAME}")
+    raise "Window not found" if $?.exitstatus != 0
+    File.read(TEMPNAME).split($/)
+  end
+
+  def until timeout = 1
+    wait(timeout) { yield capture }
+  end
+
+private
+  def wait timeout = 1
+    waited = 0
+    until yield
+      waited += 0.1
+      sleep 0.1
+      raise "timeout" if waited > timeout
+    end
+  end
+
+  def go *args
+    %x[tmux #{args.join ' '}].split($/)
+  end
+end
+
+class TestGoFZF < MiniTest::Unit::TestCase
+  attr_reader :tmux
+
+  def tempname
+    '/tmp/output'
+  end
+
+  def setup
+    ENV.delete 'FZF_DEFAULT_OPTS'
+    ENV.delete 'FZF_DEFAULT_COMMAND'
+    @prev = Tmux.current
+    @tmux = Tmux.new
+    File.unlink tempname rescue nil
+  end
+
+  def teardown
+    @tmux.kill
+    Tmux.select @prev
+  end
+
+  def test_vanilla
+    tmux.send_keys "seq 1 100000 | fzf > #{tempname}", :Enter
+    tmux.until { |lines| lines.last =~ /^>/ && lines[-2] =~ /^  100000/ }
+    lines = tmux.capture
+    assert_equal '  2',             lines[-4]
+    assert_equal '> 1',             lines[-3]
+    assert_equal '  100000/100000', lines[-2]
+    assert_equal '>',               lines[-1]
+
+    # Testing basic key bindings
+    tmux.send_keys '99', 'C-a', '1', 'C-f', '3', 'C-b', 'C-h', 'C-u', 'C-e', 'C-y', 'C-k', 'Tab', 'BTab'
+    tmux.until { |lines| lines.last == '> 391' }
+    lines = tmux.capture
+    assert_equal '> 1391',       lines[-4]
+    assert_equal '  391',        lines[-3]
+    assert_equal '  856/100000', lines[-2]
+    assert_equal '> 391',        lines[-1]
+
+    tmux.send_keys :Enter
+    tmux.close
+    assert_equal '1391', File.read(tempname).chomp
+  end
+
+  def test_fzf_default_command
+    tmux.send_keys "FZF_DEFAULT_COMMAND='echo hello' fzf > #{tempname}", :Enter
+    tmux.until { |lines| lines.last =~ /^>/ }
+
+    tmux.send_keys :Enter
+    tmux.close
+    assert_equal 'hello', File.read(tempname).chomp
+  end
+
+  def test_fzf_prompt
+    tmux.send_keys "fzf -q 'foo bar foo-bar'", :Enter
+    tmux.until { |lines| lines.last =~ /foo-bar/ }
+
+    # CTRL-A
+    tmux.send_keys "C-A", "("
+    tmux.until { |lines| lines.last == '> (foo bar foo-bar' }
+
+    # META-F
+    tmux.send_keys :Escape, :f, ")"
+    tmux.until { |lines| lines.last == '> (foo) bar foo-bar' }
+
+    # CTRL-B
+    tmux.send_keys "C-B", "var"
+    tmux.until { |lines| lines.last == '> (foovar) bar foo-bar' }
+
+    # Left, CTRL-D
+    tmux.send_keys :Left, :Left, "C-D"
+    tmux.until { |lines| lines.last == '> (foovr) bar foo-bar' }
+
+    # META-BS
+    tmux.send_keys :Escape, :BSpace
+    tmux.until { |lines| lines.last == '> (r) bar foo-bar' }
+
+    # CTRL-Y
+    tmux.send_keys "C-Y", "C-Y"
+    tmux.until { |lines| lines.last == '> (foovfoovr) bar foo-bar' }
+
+    # META-B
+    tmux.send_keys :Escape, :b, :Space, :Space
+    tmux.until { |lines| lines.last == '> (  foovfoovr) bar foo-bar' }
+
+    # CTRL-F / Right
+    tmux.send_keys 'C-F', :Right, '/'
+    tmux.until { |lines| lines.last == '> (  fo/ovfoovr) bar foo-bar' }
+
+    # CTRL-H / BS
+    tmux.send_keys 'C-H', :BSpace
+    tmux.until { |lines| lines.last == '> (  fovfoovr) bar foo-bar' }
+
+    # CTRL-E
+    tmux.send_keys "C-E", 'baz'
+    tmux.until { |lines| lines.last == '> (  fovfoovr) bar foo-barbaz' }
+
+    # CTRL-U
+    tmux.send_keys "C-U"
+    tmux.until { |lines| lines.last == '>' }
+
+    # CTRL-Y
+    tmux.send_keys "C-Y"
+    tmux.until { |lines| lines.last == '> (  fovfoovr) bar foo-barbaz' }
+
+    # CTRL-W
+    tmux.send_keys "C-W", "bar-foo"
+    tmux.until { |lines| lines.last == '> (  fovfoovr) bar bar-foo' }
+
+    # META-D
+    tmux.send_keys :Escape, :b, :Escape, :b, :Escape, :d, "C-A", "C-Y"
+    tmux.until { |lines| lines.last == '> bar(  fovfoovr) bar -foo' }
+
+    # CTRL-M
+    tmux.send_keys "C-M"
+    tmux.until { |lines| lines.last !~ /^>/ }
+    tmux.close
+  end
+end
+
diff --git a/test/test_fzf.rb b/test/test_ruby.rb
similarity index 99%
rename from test/test_fzf.rb
rename to test/test_ruby.rb
index e11f2c5..674ed3b 100644
--- a/test/test_fzf.rb
+++ b/test/test_ruby.rb
@@ -54,7 +54,7 @@ class MockTTY
   end
 end
 
-class TestFZF < MiniTest::Unit::TestCase
+class TestRubyFZF < MiniTest::Unit::TestCase
   def setup
     ENV.delete 'FZF_DEFAULT_SORT'
     ENV.delete 'FZF_DEFAULT_OPTS'