diff --git a/test/core_ext_test.rb b/test/core_ext_test.rb
index 11023e8..f2fc0f7 100644
--- a/test/core_ext_test.rb
+++ b/test/core_ext_test.rb
@@ -1,6 +1,6 @@
 require 'test_helper'
 
-class CoreExtTest < Test::Unit::TestCase
+class CoreExtTest < Minitest::Test
   test 'Hash#deep_symbolize_keys walks arrays, too' do
     hash     = { 'foo' => [{ 'bar' => 'bar', 'baz' => { 'buz' => 'buz' } }] }
     expected = { :foo  => [{ :bar  => 'bar', :baz  => { :buz  => 'buz' } }] }
diff --git a/test/hashr_test.rb b/test/hashr_test.rb
index 4a172c2..ff03bad 100644
--- a/test/hashr_test.rb
+++ b/test/hashr_test.rb
@@ -1,12 +1,12 @@
 require 'test_helper'
 
-class HashrTest < Test::Unit::TestCase
+class HashrTest < Minitest::Test
   def teardown
     Hashr.raise_missing_keys = false
   end
 
   test 'initialize takes nil' do
-    assert_nothing_raised { Hashr.new(nil) }
+    Hashr.new(nil)
   end
 
   test 'method access on an existing key returns the value' do
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 67dd321..ceddc1d 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,4 +1,4 @@
 require 'bundler/setup'
-require 'test/unit'
+require 'minitest/autorun'
 require 'test_declarative'
 require 'hashr'
-- 
1.8.3.1