3 files changed, 5 insertions(+), 4 deletions(-)

M Makefile
M dhall.gemspec
M test/test_readme.rb

@@ 15,7 15,7 @@ test: lib/dhall/parser.citrus
 	bundle exec ruby -E UTF-8 test/test_suite.rb
 
 unit: lib/dhall/parser.citrus
-	bundle exec ruby -E UTF-8 test/test_suite.rb -n'/unit|import|TestReadme|TestLoad|TestAsDhall|TestResolvers|TestBinary|TestAsJson|TestCoder/'
+	bundle exec ruby -E UTF-8 test/test_suite.rb -fn'/unit|import|TestReadme|TestLoad|TestAsDhall|TestResolvers|TestBinary|TestAsJson|TestCoder/'
 
 clean:
 	$(RM) lib/dhall/parser.citrus

@@ 34,6 34,7 @@ Gem::Specification.new do |spec|
 	spec.add_dependency "value_semantics", "~> 3.0"
 
 	spec.add_development_dependency "abnf", "~> 0.0.1"
+	spec.add_development_dependency "minitest-fail-fast", "~> 0.1.0"
 	spec.add_development_dependency "simplecov", "~> 0.16.1"
 	spec.add_development_dependency "webmock", "~> 3.5"
 end

@@ 200,7 200,7 @@ class TestReadme < Minitest::Test
 	end
 
 	def test_none_reduce
-		assert_equal nil, NONE.reduce(nil) { |x| x }
+		assert_nil NONE.reduce(nil) { |x| x }
 	end
 
 	def test_none_to_s


@@ 301,7 301,7 @@ class TestReadme < Minitest::Test
 	end
 
 	def test_rec_index_b_string
-		assert_equal nil, REC["b"]
+		assert_nil REC["b"]
 	end
 
 	def test_rec_fetch_a_string


@@ 323,7 323,7 @@ class TestReadme < Minitest::Test
 	end
 
 	def test_rec_dig_b
-		assert_equal nil, REC.dig(:b)
+		assert_nil REC.dig(:b)
 	end
 
 	def test_rec_slice_a