diff --git a/test/test_cli.rb b/test/test_cli.rb
index 6244da6..36ff91c 100644
--- a/test/test_cli.rb
+++ b/test/test_cli.rb
@@ -163,7 +163,7 @@ class TestGenerateLocalizationFileCLI < CLITest
 
   def test_missing_argument
     assert_raises Twine::Error do
-      parse "generate-localization-file #{@twine_file}"
+      parse "generate-localization-file #{@twine_file_path}"
     end
   end
 
diff --git a/test/test_generate_all_localization_files.rb b/test/test_generate_all_localization_files.rb
index 61f1c71..d7ef72b 100644
--- a/test/test_generate_all_localization_files.rb
+++ b/test/test_generate_all_localization_files.rb
@@ -24,10 +24,6 @@ class TestGenerateAllLocalizationFiles < CommandTest
     def setup
       super
       Dir.mkdir File.join @output_dir, 'values-en'
-
-      # both Android and Tizen can handle folders containing `values-en`
-      android_formatter = prepare_mock_formatter(Twine::Formatters::Android)
-      tizen_formatter = prepare_mock_formatter(Twine::Formatters::Tizen, false)
     end
 
     def new_runner(options = {})
@@ -60,7 +56,7 @@ class TestGenerateAllLocalizationFiles < CommandTest
     def test_does_not_create_language_folders
       Dir.mkdir File.join @output_dir, 'en.lproj'
       new_runner.generate_all_localization_files
-      refute File.exists?(File.join(@output_dir, 'es.lproj')), "language folder should not be created"
+      refute File.exist?(File.join(@output_dir, 'es.lproj')), "language folder should not be created"
     end
 
     def test_prints_empty_file_warnings
@@ -86,13 +82,13 @@ class TestGenerateAllLocalizationFiles < CommandTest
     def test_creates_output_folder
       FileUtils.remove_entry_secure @output_dir
       new_runner.generate_all_localization_files
-      assert File.exists? @output_dir
+      assert File.exist? @output_dir
     end
 
     def test_creates_language_folders
       new_runner.generate_all_localization_files
-      assert File.exists?(File.join(@output_dir, 'en.lproj')), "language folder 'en.lproj' should be created"
-      assert File.exists?(File.join(@output_dir, 'es.lproj')), "language folder 'es.lproj' should be created"
+      assert File.exist?(File.join(@output_dir, 'en.lproj')), "language folder 'en.lproj' should be created"
+      assert File.exist?(File.join(@output_dir, 'es.lproj')), "language folder 'es.lproj' should be created"
     end
 
     def test_prints_empty_file_warnings
diff --git a/test/test_generate_localization_archive.rb b/test/test_generate_localization_archive.rb
index 075f657..bc84e36 100644
--- a/test/test_generate_localization_archive.rb
+++ b/test/test_generate_localization_archive.rb
@@ -19,7 +19,7 @@ class TestGenerateLocalizationArchive < CommandTest
   def test_generates_zip_file
     new_runner.generate_localization_archive
 
-    assert File.exists?(@output_path), "zip file should exist"
+    assert File.exist?(@output_path), "zip file should exist"
   end
 
   def test_zip_file_structure
diff --git a/test/twine_test.rb b/test/twine_test.rb
index 5f1e4cd..b3b2118 100644
--- a/test/twine_test.rb
+++ b/test/twine_test.rb
@@ -1,6 +1,6 @@
 require 'erb'
 require 'minitest/autorun'
-require "mocha/mini_test"
+require "mocha/minitest"
 require 'securerandom'
 require 'stringio'
 require 'twine'
@@ -23,7 +23,7 @@ class TwineTest < Minitest::Test
   end
 
   def teardown
-    FileUtils.remove_entry_secure @output_dir if File.exists? @output_dir
+    FileUtils.remove_entry_secure @output_dir if File.exist? @output_dir
     Twine::Formatters.formatters.clear
     Twine::Formatters.formatters.concat @formatters
     super