diff --git a/Gemfile b/Gemfile
index 539f7f95..62c5a654 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,9 +5,8 @@ gem "hoe-git"
 gem "hoe-ignore"
 gem "rdoc"
 gem "rake-compiler"
-gem "test-unit", "~> 3.0"
 
 gem "rack", "< 3.0"
-gem 'minitest', '~> 5.8'
+gem "minitest", "~> 5.9"
 
 gem "jruby-openssl", :platform => "jruby"
diff --git a/Rakefile b/Rakefile
index 5f7d0b6a..fba46f34 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,4 @@
+require "bundler/setup"
 require "hoe"
 require "rake/extensiontask"
 require "rake/javaextensiontask"
diff --git a/gemfiles/2.1-Gemfile b/gemfiles/2.1-Gemfile
index db6e644f..a929221a 100644
--- a/gemfiles/2.1-Gemfile
+++ b/gemfiles/2.1-Gemfile
@@ -5,9 +5,8 @@ gem "hoe-git"
 gem "hoe-ignore"
 gem "rdoc"
 gem "rake-compiler"
-gem "test-unit", "~> 3.0"
 
 gem "rack", "~> 1.6"
-gem 'minitest', '~> 5.8'
+gem "minitest", '~> 5.9'
 
 gem "jruby-openssl", :platform => "jruby"
diff --git a/test/test_app_status.rb b/test/test_app_status.rb
index 28dae324..c98ae6ce 100644
--- a/test/test_app_status.rb
+++ b/test/test_app_status.rb
@@ -1,8 +1,9 @@
-require 'test/unit'
-require 'rack'
-require 'puma/app/status'
+require "test_helper"
 
-class TestAppStatus < Test::Unit::TestCase
+require "puma/app/status"
+require "rack"
+
+class TestAppStatus < Minitest::Test
   class FakeServer
     def initialize
       @status = :running
diff --git a/test/test_binder.rb b/test/test_binder.rb
index 83548cb1..a9734d4c 100644
--- a/test/test_binder.rb
+++ b/test/test_binder.rb
@@ -1,11 +1,10 @@
-require "rbconfig"
-require 'test/unit'
-require 'testhelp'
+require "test_helper"
 
-require 'puma/binder'
-require 'puma/events'
+require "puma/binder"
+require "puma/events"
+require "puma/puma_http11"
 
-class TestBinder < Test::Unit::TestCase
+class TestBinder < Minitest::Test
 
   def setup
     @events = Puma::Events.new(STDOUT, STDERR)
@@ -13,7 +12,7 @@ class TestBinder < Test::Unit::TestCase
   end
 
   def test_localhost_addresses_dont_alter_listeners_for_tcp_addresses
-    omit_on_jruby
+    skip_on_jruby
 
     @binder.parse(["tcp://localhost:10001"], @events)
 
@@ -21,7 +20,7 @@ class TestBinder < Test::Unit::TestCase
   end
 
   def test_localhost_addresses_dont_alter_listeners_for_ssl_addresses
-    omit_on_jruby
+    skip_on_jruby
 
     key =  File.expand_path "../../examples/puma/puma_keypair.pem", __FILE__
     cert = File.expand_path "../../examples/puma/cert_puma.pem", __FILE__
diff --git a/test/test_cli.rb b/test/test_cli.rb
index 603f85d3..94c21705 100644
--- a/test/test_cli.rb
+++ b/test/test_cli.rb
@@ -1,10 +1,8 @@
-require "rbconfig"
-require 'test/unit'
-require 'puma/cli'
-require 'tempfile'
-require 'yaml'
+require "test_helper"
 
-class TestCLI < Test::Unit::TestCase
+require "puma/cli"
+
+class TestCLI < Minitest::Test
   def setup
     @environment = 'production'
     @tmp_file = Tempfile.new("puma-test")
@@ -168,10 +166,7 @@ class TestCLI < Test::Unit::TestCase
                           "--state", @tmp_path ]
     cli.launcher.write_state
 
-    data = nil
-    assert_nothing_raised do
-      data = YAML.load_file( @tmp_path )
-    end
+    data = YAML.load_file(@tmp_path)
 
     keys_not_stripped = data.keys & Puma::CLI::KEYS_NOT_TO_PERSIST_IN_STATE
     assert_empty keys_not_stripped
diff --git a/test/test_config.rb b/test/test_config.rb
index bff985b4..2290ebb4 100644
--- a/test/test_config.rb
+++ b/test/test_config.rb
@@ -1,9 +1,8 @@
-require 'test/unit'
+require "test_helper"
 
-require 'puma'
-require 'puma/configuration'
+require "puma/configuration"
 
-class TestConfigFile < Test::Unit::TestCase
+class TestConfigFile < Minitest::Test
   def test_app_from_rackup
     conf = Puma::Configuration.new do |c|
       c.rackup "test/hello-bind.ru"
diff --git a/test/testhelp.rb b/test/test_helper.rb
similarity index 65%
rename from test/testhelp.rb
rename to test/test_helper.rb
index 862c507e..e5835374 100644
--- a/test/testhelp.rb
+++ b/test/test_helper.rb
@@ -1,20 +1,17 @@
 # Copyright (c) 2011 Evan Phoenix
 # Copyright (c) 2005 Zed A. Shaw
 
-require 'rubygems'
-require 'test/unit'
-require 'net/http'
-require 'digest/sha1'
-require 'uri'
-require 'stringio'
-
-require 'puma'
-require 'puma/detect'
+require "bundler/setup"
+require "minitest/autorun"
+require "minitest/pride"
+require "puma"
+require "puma/detect"
 
 # Either takes a string to do a get request against, or a tuple of [URI, HTTP] where
 # HTTP is some kind of Net::HTTP request object (POST, HEAD, etc.)
 def hit(uris)
   results = []
+
   uris.each do |u|
     res = nil
 
@@ -33,7 +30,7 @@ def hit(uris)
 end
 
 module TimeoutEveryTestCase
-  def run(*args)
+  def run(*)
     if !!ENV['CI']
       Timeout.timeout(60) { super }
     else
@@ -41,11 +38,13 @@ module TimeoutEveryTestCase
     end
   end
 end
-Test::Unit::TestCase.prepend TimeoutEveryTestCase
 
-module OmitTestsBasedOnRubyEngine
-  def omit_on_jruby
-    omit "Omitted on JRuby" if Puma.jruby?
+Minitest::Test.prepend TimeoutEveryTestCase
+
+module SkipTestsBasedOnRubyEngine
+  def skip_on_jruby
+    skip "Skipped on JRuby" if Puma.jruby?
   end
 end
-Test::Unit::TestCase.prepend OmitTestsBasedOnRubyEngine
+
+Minitest::Test.include SkipTestsBasedOnRubyEngine
diff --git a/test/test_http10.rb b/test/test_http10.rb
index d8ffa668..6b13f18c 100644
--- a/test/test_http10.rb
+++ b/test/test_http10.rb
@@ -1,10 +1,10 @@
-require 'testhelp'
+require "test_helper"
 
-class Http10ParserTest < Test::Unit::TestCase
-  include Puma
+require "puma/puma_http11"
 
+class Http10ParserTest < Minitest::Test
   def test_parse_simple
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
     req = {}
     http = "GET / HTTP/1.0\r\n\r\n"
     nread = parser.execute(req, http, 0)
@@ -17,10 +17,10 @@ class Http10ParserTest < Test::Unit::TestCase
     assert_equal '/', req['REQUEST_PATH']
     assert_equal 'HTTP/1.0', req['HTTP_VERSION']
     assert_equal '/', req['REQUEST_URI']
-    assert_equal 'GET', req['REQUEST_METHOD']    
+    assert_equal 'GET', req['REQUEST_METHOD']
     assert_nil req['FRAGMENT']
     assert_nil req['QUERY_STRING']
-    
+
     parser.reset
     assert parser.nread == 0, "Number read after reset should be 0"
   end
diff --git a/test/test_http11.rb b/test/test_http11.rb
index bd203f0c..a5bf56b8 100644
--- a/test/test_http11.rb
+++ b/test/test_http11.rb
@@ -1,14 +1,14 @@
 # Copyright (c) 2011 Evan Phoenix
 # Copyright (c) 2005 Zed A. Shaw
 
-require 'testhelp'
+require "test_helper"
 
-include Puma
+require "puma/puma_http11"
 
-class Http11ParserTest < Test::Unit::TestCase
+class Http11ParserTest < Minitest::Test
 
   def test_parse_simple
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
     req = {}
     http = "GET /?a=1 HTTP/1.1\r\n\r\n"
     nread = parser.execute(req, http, 0)
@@ -30,7 +30,7 @@ class Http11ParserTest < Test::Unit::TestCase
   end
 
   def test_parse_escaping_in_query
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
     req = {}
     http = "GET /admin/users?search=%27%%27 HTTP/1.1\r\n\r\n"
     nread = parser.execute(req, http, 0)
@@ -48,7 +48,7 @@ class Http11ParserTest < Test::Unit::TestCase
   end
 
   def test_parse_absolute_uri
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
     req = {}
     http = "GET http://192.168.1.96:3000/api/v1/matches/test?1=1 HTTP/1.1\r\n\r\n"
     nread = parser.execute(req, http, 0)
@@ -72,7 +72,7 @@ class Http11ParserTest < Test::Unit::TestCase
   end
 
   def test_parse_dumbfuck_headers
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
     req = {}
     should_be_good = "GET / HTTP/1.1\r\naaaaaaaaaaaaa:++++++++++\r\n\r\n"
     nread = parser.execute(req, should_be_good, 0)
@@ -82,7 +82,7 @@ class Http11ParserTest < Test::Unit::TestCase
   end
 
   def test_parse_error
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
     req = {}
     bad_http = "GET / SsUTF/1.1"
 
@@ -99,12 +99,12 @@ class Http11ParserTest < Test::Unit::TestCase
   end
 
   def test_fragment_in_uri
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
     req = {}
     get = "GET /forums/1/topics/2375?page=1#posts-17408 HTTP/1.1\r\n\r\n"
-    assert_nothing_raised do
-      parser.execute(req, get, 0)
-    end
+
+    parser.execute(req, get, 0)
+
     assert parser.finished?
     assert_equal '/forums/1/topics/2375?page=1', req['REQUEST_URI']
     assert_equal 'posts-17408', req['FRAGMENT']
@@ -125,7 +125,7 @@ class Http11ParserTest < Test::Unit::TestCase
   end
 
   def test_max_uri_path_length
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
     req = {}
 
     # Support URI path length to a max of 2048
@@ -145,7 +145,7 @@ class Http11ParserTest < Test::Unit::TestCase
   end
 
   def test_horrible_queries
-    parser = HttpParser.new
+    parser = Puma::HttpParser.new
 
     # then that large header names are caught
     10.times do |c|
diff --git a/test/test_integration.rb b/test/test_integration.rb
index 14d5cc65..ec062069 100644
--- a/test/test_integration.rb
+++ b/test/test_integration.rb
@@ -1,17 +1,11 @@
-require "rbconfig"
-require 'test/unit'
-require 'socket'
-require 'timeout'
-require 'net/http'
-require 'tempfile'
+require "test_helper"
 
-require 'puma/cli'
-require 'puma/control_cli'
-require 'puma/detect'
+require "puma/cli"
+require "puma/control_cli"
 
 # These don't run on travis because they're too fragile
 
-class TestIntegration < Test::Unit::TestCase
+class TestIntegration < Minitest::Test
   def setup
     @state_path = "test/test_puma.state"
     @bind_path = "test/test_server.sock"
@@ -116,7 +110,8 @@ class TestIntegration < Test::Unit::TestCase
   end
 
   def test_phased_restart_via_pumactl
-    omit("Too finicky, fails 50% of the time on CI.")
+    skip("Too finicky, fails 50% of the time on CI.")
+
     if Puma.jruby? || Puma.windows?
       assert true
       return
diff --git a/test/test_iobuffer.rb b/test/test_iobuffer.rb
index 6e3e29c9..95d39ac2 100644
--- a/test/test_iobuffer.rb
+++ b/test/test_iobuffer.rb
@@ -1,7 +1,8 @@
-require 'puma/io_buffer'
-require 'test/unit'
+require "test_helper"
 
-class TestIOBuffer < Test::Unit::TestCase
+require "puma/io_buffer"
+
+class TestIOBuffer < Minitest::Test
   attr_accessor :iobuf
   def setup
     self.iobuf = Puma::IOBuffer.new
@@ -13,7 +14,7 @@ class TestIOBuffer < Test::Unit::TestCase
   end
 
   def test_append_op
-    iobuf << "abc" 
+    iobuf << "abc"
     assert_equal "abc", iobuf.to_s
     iobuf << "123"
     assert_equal "abc123", iobuf.to_s
diff --git a/test/test_minissl.rb b/test/test_minissl.rb
index aeba9317..80acb401 100644
--- a/test/test_minissl.rb
+++ b/test/test_minissl.rb
@@ -1,28 +1,28 @@
-require 'test/unit'
-require 'puma'
-require 'puma/minissl'
+require "test_helper"
 
-class TestMiniSSL < Test::Unit::TestCase
+require "puma/minissl"
+
+class TestMiniSSL < Minitest::Test
 
   if defined?(JRUBY_VERSION)
     def test_raises_with_invalid_keystore_file
       ctx = Puma::MiniSSL::Context.new
 
-      exception = assert_raise(ArgumentError) { ctx.keystore = "/no/such/keystore" }
+      exception = assert_raises(ArgumentError) { ctx.keystore = "/no/such/keystore" }
       assert_equal("No such keystore file '/no/such/keystore'", exception.message)
     end
   else
     def test_raises_with_invalid_key_file
       ctx = Puma::MiniSSL::Context.new
 
-      exception = assert_raise(ArgumentError) { ctx.key = "/no/such/key" }
+      exception = assert_raises(ArgumentError) { ctx.key = "/no/such/key" }
       assert_equal("No such key file '/no/such/key'", exception.message)
     end
 
     def test_raises_with_invalid_cert_file
       ctx = Puma::MiniSSL::Context.new
 
-      exception = assert_raise(ArgumentError) { ctx.cert = "/no/such/cert" }
+      exception = assert_raises(ArgumentError) { ctx.cert = "/no/such/cert" }
       assert_equal("No such cert file '/no/such/cert'", exception.message)
     end
   end
diff --git a/test/test_null_io.rb b/test/test_null_io.rb
index 69f046be..c554dfbf 100644
--- a/test/test_null_io.rb
+++ b/test/test_null_io.rb
@@ -1,7 +1,8 @@
-require 'puma/null_io'
-require 'test/unit'
+require "test_helper"
 
-class TestNullIO < Test::Unit::TestCase
+require "puma/null_io"
+
+class TestNullIO < Minitest::Test
   attr_accessor :nio
   def setup
     self.nio = Puma::NullIO.new
diff --git a/test/test_persistent.rb b/test/test_persistent.rb
index 4aadd10b..2924106b 100644
--- a/test/test_persistent.rb
+++ b/test/test_persistent.rb
@@ -1,8 +1,6 @@
-require 'puma'
-require 'test/unit'
-require 'timeout'
+require "test_helper"
 
-class TestPersistent < Test::Unit::TestCase
+class TestPersistent < Minitest::Test
   def setup
     @valid_request = "GET / HTTP/1.1\r\nHost: test.com\r\nContent-Type: text/plain\r\n\r\n"
     @close_request = "GET / HTTP/1.1\r\nHost: test.com\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\n"
diff --git a/test/test_puma_server.rb b/test/test_puma_server.rb
index b69b1bbd..af5375d6 100644
--- a/test/test_puma_server.rb
+++ b/test/test_puma_server.rb
@@ -1,14 +1,6 @@
-require "rbconfig"
-require 'test/unit'
-require 'socket'
-require 'openssl'
+require "test_helper"
 
-require 'puma/minissl'
-require 'puma/server'
-
-require 'net/https'
-
-class TestPumaServer < Test::Unit::TestCase
+class TestPumaServer < Minitest::Test
 
   def setup
     @port = 0
@@ -195,7 +187,7 @@ class TestPumaServer < Test::Unit::TestCase
 
     data = sock.read
 
-    assert_not_match(/don't leak me bro/, data)
+    refute_match(/don't leak me bro/, data)
     assert_match(/HTTP\/1.0 500 Internal Server Error/, data)
   end
 
@@ -304,7 +296,8 @@ class TestPumaServer < Test::Unit::TestCase
   end
 
   def test_timeout_in_data_phase
-    omit("Hangs too often, TODO: fix")
+    skip("Hangs too often, TODO: fix")
+
     @server.first_data_timeout = 2
     @server.add_tcp_listener @host, @port
     @server.run
diff --git a/test/test_puma_server_ssl.rb b/test/test_puma_server_ssl.rb
index 768aab2c..ad32cfe6 100644
--- a/test/test_puma_server_ssl.rb
+++ b/test/test_puma_server_ssl.rb
@@ -1,12 +1,6 @@
-require "rbconfig"
-require 'test/unit'
-require 'socket'
-require 'openssl'
+require "test_helper"
 
-require 'puma/minissl'
-require 'puma/server'
-
-require 'net/https'
+require "puma/events"
 
 class SSLEventsHelper < ::Puma::Events
   attr_accessor :addr, :cert, :error
@@ -26,7 +20,7 @@ DISABLE_SSL = begin
               false
             end
 
-class TestPumaServerSSL < Test::Unit::TestCase
+class TestPumaServerSSL < Minitest::Test
 
   def setup
     return if DISABLE_SSL
@@ -130,7 +124,7 @@ class TestPumaServerSSL < Test::Unit::TestCase
 end
 
 # client-side TLS authentication tests
-class TestPumaServerSSLClient < Test::Unit::TestCase
+class TestPumaServerSSLClient < Minitest::Test
 
   def assert_ssl_client_error_match(error, subject=nil, &blk)
     @port = 3212
diff --git a/test/test_rack_handler.rb b/test/test_rack_handler.rb
index bf6c21f7..dd51111d 100644
--- a/test/test_rack_handler.rb
+++ b/test/test_rack_handler.rb
@@ -1,9 +1,8 @@
-require 'test/unit'
-require 'testhelp'
-require 'puma'
-require 'rack/handler/puma'
+require "test_helper"
 
-class TestPumaUnixSocket < Test::Unit::TestCase
+require "rack/handler/puma"
+
+class TestPumaUnixSocket < Minitest::Test
   def test_handler
     handler = Rack::Handler.get(:puma)
     assert_equal Rack::Handler::Puma, handler
@@ -12,7 +11,7 @@ class TestPumaUnixSocket < Test::Unit::TestCase
   end
 end
 
-class TestPathHandler < Test::Unit::TestCase
+class TestPathHandler < Minitest::Test
   def app
     Proc.new {|env| @input = env; [200, {}, ["hello world"]]}
   end
diff --git a/test/test_rack_server.rb b/test/test_rack_server.rb
index a1a66166..53a0c989 100644
--- a/test/test_rack_server.rb
+++ b/test/test_rack_server.rb
@@ -1,10 +1,8 @@
-require 'test/unit'
-require 'puma'
-require 'rack/lint'
-require 'testhelp'
-require 'puma/commonlogger'
+require "test_helper"
 
-class TestRackServer < Test::Unit::TestCase
+require "rack"
+
+class TestRackServer < Minitest::Test
 
   class ErrorChecker
     def initialize(app)
diff --git a/test/test_tcp_logger.rb b/test/test_tcp_logger.rb
index eeb2d116..560d1b6a 100644
--- a/test/test_tcp_logger.rb
+++ b/test/test_tcp_logger.rb
@@ -1,10 +1,7 @@
-require 'minitest/autorun'
-require 'minitest/assertions'
+require "test_helper"
 
-require 'puma/tcp_logger'
-require 'socket'
-require 'puma/server'
-require 'puma/events'
+require "puma/events"
+require "puma/tcp_logger"
 
 class TestTCPLogger < Minitest::Test
 
diff --git a/test/test_tcp_rack.rb b/test/test_tcp_rack.rb
index 02724f3d..1aa10f9c 100644
--- a/test/test_tcp_rack.rb
+++ b/test/test_tcp_rack.rb
@@ -1,14 +1,8 @@
-require "rbconfig"
-require 'test/unit'
-require 'socket'
-require 'openssl'
+require "test_helper"
 
-require 'puma/minissl'
-require 'puma/server'
+require "puma/events"
 
-require 'net/https'
-
-class TestTCPRack < Test::Unit::TestCase
+class TestTCPRack < Minitest::Test
 
   def setup
     @port = 3212
diff --git a/test/test_thread_pool.rb b/test/test_thread_pool.rb
index 6dfe854a..e8ea7bbf 100644
--- a/test/test_thread_pool.rb
+++ b/test/test_thread_pool.rb
@@ -1,8 +1,8 @@
-require 'test/unit'
+require "test_helper"
 
-require 'puma/thread_pool'
+require "puma/thread_pool"
 
-class TestThreadPool < Test::Unit::TestCase
+class TestThreadPool < Minitest::Test
 
   def teardown
     @pool.shutdown if @pool
diff --git a/test/test_unix_socket.rb b/test/test_unix_socket.rb
index 3c64e60c..e9de3608 100644
--- a/test/test_unix_socket.rb
+++ b/test/test_unix_socket.rb
@@ -1,13 +1,9 @@
-require "rbconfig"
-require 'test/unit'
-require 'puma/server'
-
-require 'socket'
+require "test_helper"
 
 # UNIX sockets are not recommended on JRuby
 # (or Windows)
 unless defined?(JRUBY_VERSION) || RbConfig::CONFIG["host_os"] =~ /mingw|mswin/
-  class TestPumaUnixSocket < Test::Unit::TestCase
+  class TestPumaUnixSocket < Minitest::Test
 
     App = lambda { |env| [200, {}, ["Works"]] }
 
diff --git a/test/test_ws.rb b/test/test_web_server.rb
similarity index 93%
rename from test/test_ws.rb
rename to test/test_web_server.rb
index 1b0820de..8e98deb7 100644
--- a/test/test_ws.rb
+++ b/test/test_web_server.rb
@@ -1,9 +1,9 @@
 # Copyright (c) 2011 Evan Phoenix
 # Copyright (c) 2005 Zed A. Shaw
 
-require 'testhelp'
+require "test_helper"
 
-include Puma
+require "puma/server"
 
 class TestHandler
   attr_reader :ran_test
@@ -15,14 +15,14 @@ class TestHandler
   end
 end
 
-class WebServerTest < Test::Unit::TestCase
+class WebServerTest < Minitest::Test
 
   def setup
     @valid_request = "GET / HTTP/1.1\r\nHost: www.zedshaw.com\r\nContent-Type: text/plain\r\n\r\n"
 
     @tester = TestHandler.new
 
-    @server = Server.new @tester, Events.strings
+    @server = Puma::Server.new @tester, Puma::Events.strings
     @server.add_tcp_listener "127.0.0.1", 0
 
     @server.run
@@ -86,4 +86,3 @@ class WebServerTest < Test::Unit::TestCase
   end
 
 end
-