Drop support for ruby 2.4 from ruby/spec

33 files changed, 144 insertions, 472 deletions

diff --git a/spec/ruby/library/bigdecimal/constants_spec.rb b/spec/ruby/library/bigdecimal/constants_spec.rb
index 1eb24d85cb..8d879c036a 100644
--- a/spec/ruby/library/bigdecimal/constants_spec.rb
+++ b/spec/ruby/library/bigdecimal/constants_spec.rb
@@ -2,10 +2,8 @@ require_relative '../../spec_helper'
 require 'bigdecimal'
 
 describe "BigDecimal constants" do
-  ruby_version_is "2.5" do
-    it "defines a VERSION value" do
-      BigDecimal.const_defined?(:VERSION).should be_true
-    end
+  it "defines a VERSION value" do
+    BigDecimal.const_defined?(:VERSION).should be_true
   end
 
   it "has a BASE value" do
diff --git a/spec/ruby/library/bigdecimal/shared/clone.rb b/spec/ruby/library/bigdecimal/shared/clone.rb
index e58df3a94b..935ef76e7e 100644
--- a/spec/ruby/library/bigdecimal/shared/clone.rb
+++ b/spec/ruby/library/bigdecimal/shared/clone.rb
@@ -5,20 +5,9 @@ describe :bigdecimal_clone, shared: true do
     @obj = BigDecimal("1.2345")
   end
 
-  ruby_version_is "" ... "2.5" do
-    it "copies the BigDecimal's value to a newly allocated object" do
-      copy = @obj.public_send(@method)
+  it "returns self" do
+    copy = @obj.public_send(@method)
 
-      copy.should_not equal(@obj)
-      copy.should == @obj
-    end
-  end
-
-  ruby_version_is "2.5" do
-    it "returns self" do
-      copy = @obj.public_send(@method)
-
-      copy.should equal(@obj)
-    end
+    copy.should equal(@obj)
   end
 end
diff --git a/spec/ruby/library/cgi/cookie/to_s_spec.rb b/spec/ruby/library/cgi/cookie/to_s_spec.rb
index 978c2d33eb..da15e6ed2a 100644
--- a/spec/ruby/library/cgi/cookie/to_s_spec.rb
+++ b/spec/ruby/library/cgi/cookie/to_s_spec.rb
@@ -27,16 +27,7 @@ describe "CGI::Cookie#to_s" do
     cookie.to_s.should == "test-cookie=+%21%22%23%24%25%26%27%28%29%2A%2B%2C-.%2F0123456789%3A%3B%3C%3D%3E%3F%40ABCDEFGHIJKLMNOPQRSTUVWXYZ%5B%5C%5D%5E_%60abcdefghijklmnopqrstuvwxyz%7B%7C%7D; path="
   end
 
-  ruby_version_is ""..."2.5" do
-    it "escapes tilde" do
-      cookie = CGI::Cookie.new("test-cookie", "~").to_s.should == "test-cookie=%7E; path="
-    end
+  it "does not escape tilde" do
+    cookie = CGI::Cookie.new("test-cookie", "~").to_s.should == "test-cookie=~; path="
   end
-
-  ruby_version_is "2.5" do
-    it "does not escape tilde" do
-      cookie = CGI::Cookie.new("test-cookie", "~").to_s.should == "test-cookie=~; path="
-    end
-  end
-
 end
diff --git a/spec/ruby/library/cgi/escape_spec.rb b/spec/ruby/library/cgi/escape_spec.rb
index 351bfe1070..2f1913970e 100644
--- a/spec/ruby/library/cgi/escape_spec.rb
+++ b/spec/ruby/library/cgi/escape_spec.rb
@@ -12,15 +12,7 @@ describe "CGI.escape" do
     CGI.escape(input).should == expected
   end
 
-  ruby_version_is ""..."2.5" do
-    it "escapes tilde" do
-      CGI.escape("~").should == "%7E"
-    end
-  end
-
-  ruby_version_is "2.5" do
-    it "does not escape tilde" do
-      CGI.escape("~").should == "~"
-    end
+  it "does not escape tilde" do
+    CGI.escape("~").should == "~"
   end
 end
diff --git a/spec/ruby/library/delegate/delegator/eql_spec.rb b/spec/ruby/library/delegate/delegator/eql_spec.rb
index 3170d5727a..34f56f44c9 100644
--- a/spec/ruby/library/delegate/delegator/eql_spec.rb
+++ b/spec/ruby/library/delegate/delegator/eql_spec.rb
@@ -2,45 +2,34 @@ require_relative '../../../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Delegator#eql?" do
-  ruby_version_is ""..."2.5" do
-    it "is delegated" do
-      base = mock('base')
-      delegator = DelegateSpecs::Delegator.new(base)
-      base.should_receive(:eql?).with(42).and_return(:foo)
-      delegator.eql?(42).should == :foo
-    end
-  end
-
-  ruby_version_is "2.5" do
-    it "returns true when compared with same delegator" do
-      base = mock('base')
-      delegator = DelegateSpecs::Delegator.new(base)
+  it "returns true when compared with same delegator" do
+    base = mock('base')
+    delegator = DelegateSpecs::Delegator.new(base)
 
-      delegator.eql?(delegator).should be_true
-    end
+    delegator.eql?(delegator).should be_true
+  end
 
-    it "returns true when compared with the inner object" do
-      base = mock('base')
-      delegator = DelegateSpecs::Delegator.new(base)
+  it "returns true when compared with the inner object" do
+    base = mock('base')
+    delegator = DelegateSpecs::Delegator.new(base)
 
-      delegator.eql?(base).should be_true
-    end
+    delegator.eql?(base).should be_true
+  end
 
-    it "returns false when compared with the delegator with other object" do
-      base = mock('base')
-      other = mock('other')
-      delegator0 = DelegateSpecs::Delegator.new(base)
-      delegator1 = DelegateSpecs::Delegator.new(other)
+  it "returns false when compared with the delegator with other object" do
+    base = mock('base')
+    other = mock('other')
+    delegator0 = DelegateSpecs::Delegator.new(base)
+    delegator1 = DelegateSpecs::Delegator.new(other)
 
-      delegator0.eql?(delegator1).should be_false
-    end
+    delegator0.eql?(delegator1).should be_false
+  end
 
-    it "returns false when compared with the other object" do
-      base = mock('base')
-      other = mock('other')
-      delegator = DelegateSpecs::Delegator.new(base)
+  it "returns false when compared with the other object" do
+    base = mock('base')
+    other = mock('other')
+    delegator = DelegateSpecs::Delegator.new(base)
 
-      delegator.eql?(other).should be_false
-    end
+    delegator.eql?(other).should be_false
   end
 end
diff --git a/spec/ruby/library/erb/util/shared/url_encode.rb b/spec/ruby/library/erb/util/shared/url_encode.rb
index 5ac6215523..a2d648fd31 100644
--- a/spec/ruby/library/erb/util/shared/url_encode.rb
+++ b/spec/ruby/library/erb/util/shared/url_encode.rb
@@ -6,16 +6,8 @@ describe :erb_util_url_encode, shared: true do
     ERB::Util.__send__(@method, input).should == expected
   end
 
-  ruby_version_is ""..."2.5" do
-    it "escapes tilde" do
-      ERB::Util.__send__(@method, "~").should == "%7E"
-    end
-  end
-
-  ruby_version_is "2.5" do
-    it "does not escape tilde" do
-      ERB::Util.__send__(@method, "~").should == "~"
-    end
+  it "does not escape tilde" do
+    ERB::Util.__send__(@method, "~").should == "~"
   end
 
   it "encode unicode string" do
diff --git a/spec/ruby/library/getoptlong/shared/get.rb b/spec/ruby/library/getoptlong/shared/get.rb
index 772a7f6773..f44cf583d2 100644
--- a/spec/ruby/library/getoptlong/shared/get.rb
+++ b/spec/ruby/library/getoptlong/shared/get.rb
@@ -53,12 +53,10 @@ describe :getoptlong_get, shared: true do
     end
   end
 
-  ruby_version_is "2.5" do
-    # https://bugs.ruby-lang.org/issues/13858
-    it "returns multiline argument" do
-      argv [ "--size=\n10k\n" ] do
-        @opts.send(@method).should == [ "--size", "\n10k\n" ]
-      end
+  # https://bugs.ruby-lang.org/issues/13858
+  it "returns multiline argument" do
+    argv [ "--size=\n10k\n" ] do
+      @opts.send(@method).should == [ "--size", "\n10k\n" ]
     end
   end
 end
diff --git a/spec/ruby/library/mathn/bignum/exponent_spec.rb b/spec/ruby/library/mathn/bignum/exponent_spec.rb
deleted file mode 100644
index ddd19ffdb4..0000000000
--- a/spec/ruby/library/mathn/bignum/exponent_spec.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require 'mathn'
-
-  describe "Bignum#**" do
-    before :each do
-      @bignum = bignum_value(47)
-    end
-
-    it "returns self raised to other (positive) power" do
-      (@bignum ** 4).should == 7237005577332262361485077344629993318496048279512298547155833600056910050625
-      (@bignum ** 1.2).should be_close(57262152889751597425762.57804, TOLERANCE)
-    end
-
-    it "returns a complex number when negative and raised to a fractional power" do
-      ((-@bignum) ** (1/3)).should be_close(Complex(1048576,1816186.907597341), TOLERANCE)
-      ((-@bignum) ** (1.0/3)).should be_close(Complex(1048576,1816186.907597341), TOLERANCE)
-    end
-  end
-end
diff --git a/spec/ruby/library/mathn/complex/Complex_spec.rb b/spec/ruby/library/mathn/complex/Complex_spec.rb
deleted file mode 100644
index 105902ed5d..0000000000
--- a/spec/ruby/library/mathn/complex/Complex_spec.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require 'mathn'
-
-  describe "Kernel#Complex" do
-    it "returns an Integer if imaginary part is 0" do
-      Complex(42,0).should == 42
-      Complex(42,0).should be_kind_of(Fixnum)
-      Complex(bignum_value,0).should == bignum_value
-      Complex(bignum_value,0).should be_kind_of(Bignum)
-    end
-  end
-end
diff --git a/spec/ruby/library/mathn/fixnum/exponent_spec.rb b/spec/ruby/library/mathn/fixnum/exponent_spec.rb
deleted file mode 100644
index 160bf7f115..0000000000
--- a/spec/ruby/library/mathn/fixnum/exponent_spec.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require 'mathn'
-
-  describe "Fixnum#**" do
-    it "returns self raised to other (positive) power" do
-      (2 ** 4).should == 16
-      (2 ** 1.2).should be_close(2.2973967, TOLERANCE)
-    end
-
-    it "returns a complex number when negative and raised to a fractional power" do
-      ((-8) ** (1/3)).should be_close(Complex(1, 1.73205), TOLERANCE)
-      ((-8) ** (1.0/3)).should be_close(Complex(1, 1.73205), TOLERANCE)
-    end
-  end
-end
diff --git a/spec/ruby/library/mathn/float/exponent_spec.rb b/spec/ruby/library/mathn/float/exponent_spec.rb
deleted file mode 100644
index 312119db00..0000000000
--- a/spec/ruby/library/mathn/float/exponent_spec.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require 'mathn'
-
-  describe "Float#**" do
-    it "returns self raised to other (positive) power" do
-      (2.0 ** 4).should == 16.0
-      (2.0 ** 1.2).should be_close(2.2973967, TOLERANCE)
-    end
-
-    it "returns a complex number when negative and raised to a fractional power" do
-      ((-8.0) ** (1/3)).should be_close(Complex(1, 1.73205), TOLERANCE)
-      ((-8.0) ** (1.0/3)).should be_close(Complex(1, 1.73205), TOLERANCE)
-    end
-  end
-end
diff --git a/spec/ruby/library/mathn/integer/from_prime_division_spec.rb b/spec/ruby/library/mathn/integer/from_prime_division_spec.rb
deleted file mode 100644
index df2db6d8c1..0000000000
--- a/spec/ruby/library/mathn/integer/from_prime_division_spec.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require 'mathn'
-
-  describe "Integer.from_prime_division" do
-    it "reverses a prime factorization of an integer" do
-      Integer.from_prime_division([[2, 1], [3, 2], [7, 1]]).should == 126
-    end
-  end
-end
diff --git a/spec/ruby/library/mathn/integer/prime_division_spec.rb b/spec/ruby/library/mathn/integer/prime_division_spec.rb
deleted file mode 100644
index fb4a1c3fea..0000000000
--- a/spec/ruby/library/mathn/integer/prime_division_spec.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require 'mathn'
-
-  describe "Integer#prime_division" do
-    it "performs a prime factorization of a positive integer" do
-      100.prime_division.should == [[2, 2], [5, 2]]
-    end
-
-    # Proper handling of negative integers has been added to MRI trunk
-    # in revision 24091. Prior to that, all versions of MRI returned nonsense.
-    it "performs a prime factorization of a negative integer" do
-      -26.prime_division.should == [[-1, 1], [2, 1], [13, 1]]
-    end
-
-    it "raises a ZeroDivisionError when is called on zero" do
-      -> { 0.prime_division }.should raise_error(ZeroDivisionError)
-    end
-  end
-end
diff --git a/spec/ruby/library/mathn/math/fixtures/classes.rb b/spec/ruby/library/mathn/math/fixtures/classes.rb
deleted file mode 100644
index 024732fa7a..0000000000
--- a/spec/ruby/library/mathn/math/fixtures/classes.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-class IncludesMath
-  include Math
-end
diff --git a/spec/ruby/library/mathn/math/rsqrt_spec.rb b/spec/ruby/library/mathn/math/rsqrt_spec.rb
deleted file mode 100644
index 6cb7595afe..0000000000
--- a/spec/ruby/library/mathn/math/rsqrt_spec.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require_relative 'shared/rsqrt'
-
-  describe "Math#rsqrt" do
-    it_behaves_like :mathn_math_rsqrt, :_, IncludesMath.new
-
-    it "is a private instance method" do
-      IncludesMath.should have_private_instance_method(:rsqrt)
-    end
-  end
-
-  describe "Math.rsqrt" do
-    it_behaves_like :mathn_math_rsqrt, :_, Math
-  end
-end
diff --git a/spec/ruby/library/mathn/math/shared/rsqrt.rb b/spec/ruby/library/mathn/math/shared/rsqrt.rb
deleted file mode 100644
index ea3d1b0cfc..0000000000
--- a/spec/ruby/library/mathn/math/shared/rsqrt.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-require 'mathn'
-require_relative '../fixtures/classes'
-
-describe :mathn_math_rsqrt, shared: true do
-  it "returns the square root for Rational numbers" do
-    @object.send(:rsqrt, Rational(9, 25)).should == Rational(3, 5)
-    @object.send(:rsqrt, 16/64).should == Rational(1, 2)
-  end
-
-  it "returns the square root for positive numbers" do
-    @object.send(:rsqrt, 1).should == 1
-    @object.send(:rsqrt, 4.0).should == 2.0
-    @object.send(:rsqrt, 12.34).should == Math.sqrt!(12.34)
-  end
-
-  it "raises an Math::DomainError if the argument is a negative number" do
-    -> { @object.send(:rsqrt, -1) }.should raise_error(Math::DomainError)
-    -> { @object.send(:rsqrt, -4.0) }.should raise_error(Math::DomainError)
-    -> { @object.send(:rsqrt, -16/64) }.should raise_error(Math::DomainError)
-  end
-end
diff --git a/spec/ruby/library/mathn/math/shared/sqrt.rb b/spec/ruby/library/mathn/math/shared/sqrt.rb
deleted file mode 100644
index 5e6dae1d4f..0000000000
--- a/spec/ruby/library/mathn/math/shared/sqrt.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-require 'mathn'
-require_relative '../fixtures/classes'
-
-describe :mathn_math_sqrt, shared: true do
-  it "returns the square root for Rational numbers" do
-    @object.send(:sqrt, Rational(9, 25)).should == Rational(3, 5)
-    @object.send(:sqrt, 16/64).should == Rational(1, 2)
-  end
-
-  it "returns the square root for Complex numbers" do
-    @object.send(:sqrt, Complex(1, 0)).should == 1
-  end
-
-  it "returns the square root for positive numbers" do
-    @object.send(:sqrt, 1).should == 1
-    @object.send(:sqrt, 4.0).should == 2.0
-    @object.send(:sqrt, 12.34).should == Math.sqrt!(12.34)
-  end
-
-  it "returns the square root for negative numbers" do
-    @object.send(:sqrt, -9).should == Complex(0, 3)
-    @object.send(:sqrt, -5.29).should == Complex(0, 2.3)
-    @object.send(:sqrt, -16/64).should == Complex(0, 1/2)
-  end
-end
diff --git a/spec/ruby/library/mathn/math/sqrt_spec.rb b/spec/ruby/library/mathn/math/sqrt_spec.rb
deleted file mode 100644
index 49cfe3600e..0000000000
--- a/spec/ruby/library/mathn/math/sqrt_spec.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require_relative 'shared/sqrt'
-
-  describe "Math#rsqrt" do
-    it_behaves_like :mathn_math_sqrt, :_, IncludesMath.new
-
-    it "is a private instance method" do
-      IncludesMath.should have_private_instance_method(:sqrt)
-    end
-  end
-
-  describe "Math.rsqrt" do
-    it_behaves_like :mathn_math_sqrt, :_, Math
-  end
-end
diff --git a/spec/ruby/library/mathn/mathn_spec.rb b/spec/ruby/library/mathn/mathn_spec.rb
deleted file mode 100644
index 129c8f3288..0000000000
--- a/spec/ruby/library/mathn/mathn_spec.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-require_relative '../../spec_helper'
-
-describe "mathn" do
-  ruby_version_is "2.5" do
-    it "is no longer part of the standard library" do
-      -> {
-        require "mathn"
-      }.should raise_error(LoadError) { |e|
-        e.path.should == 'mathn'
-      }
-    end
-  end
-end
diff --git a/spec/ruby/library/mathn/rational/Rational_spec.rb b/spec/ruby/library/mathn/rational/Rational_spec.rb
deleted file mode 100644
index 9a34c99751..0000000000
--- a/spec/ruby/library/mathn/rational/Rational_spec.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require 'mathn'
-
-  describe "Kernel#Rational" do
-    it "returns an Integer if denominator divides numerator evenly" do
-      Rational(42,6).should == 7
-      Rational(42,6).should be_kind_of(Fixnum)
-      Rational(bignum_value,1).should == bignum_value
-      Rational(bignum_value,1).should be_kind_of(Bignum)
-    end
-  end
-end
diff --git a/spec/ruby/library/mathn/rational/inspect_spec.rb b/spec/ruby/library/mathn/rational/inspect_spec.rb
deleted file mode 100644
index cbf67ec0f3..0000000000
--- a/spec/ruby/library/mathn/rational/inspect_spec.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-require_relative '../../../spec_helper'
-
-ruby_version_is ''...'2.5' do
-  require 'mathn'
-
-  describe "Rational#inspect" do
-    it "returns a string representation of self" do
-      Rational(3, 4).inspect.should == "(3/4)"
-      Rational(-5, 8).inspect.should == "(-5/8)"
-      Rational(-1, -2).inspect.should == "(1/2)"
-      Rational(0, 2).inspect.should == "0"
-      Rational(bignum_value, 1).inspect.should == "#{bignum_value}"
-    end
-  end
-end
diff --git a/spec/ruby/library/net/ftp/initialize_spec.rb b/spec/ruby/library/net/ftp/initialize_spec.rb
index 507320e494..a2f64ddb1b 100644
--- a/spec/ruby/library/net/ftp/initialize_spec.rb
+++ b/spec/ruby/library/net/ftp/initialize_spec.rb
@@ -6,9 +6,7 @@ describe "Net::FTP#initialize" do
     @ftp = Net::FTP.allocate
     @ftp.stub!(:connect)
     @port_args = []
-    ruby_version_is "2.5" do
-      @port_args << 21
-    end
+    @port_args << 21
   end
 
   it "is private" do
diff --git a/spec/ruby/library/rbconfig/sizeof/limits_spec.rb b/spec/ruby/library/rbconfig/sizeof/limits_spec.rb
index a026135eee..776099da27 100644
--- a/spec/ruby/library/rbconfig/sizeof/limits_spec.rb
+++ b/spec/ruby/library/rbconfig/sizeof/limits_spec.rb
@@ -1,42 +1,40 @@
 require_relative '../../../spec_helper'
 require 'rbconfig/sizeof'
 
-ruby_version_is "2.5" do
-  describe "RbConfig::LIMITS" do
-    it "is a Hash" do
-      RbConfig::LIMITS.should be_kind_of(Hash)
-    end
+describe "RbConfig::LIMITS" do
+  it "is a Hash" do
+    RbConfig::LIMITS.should be_kind_of(Hash)
+  end
 
-    it "has string keys and numeric values" do
-      RbConfig::LIMITS.each do |key, value|
-        key.should be_kind_of String
-        value.should be_kind_of Numeric
-      end
+  it "has string keys and numeric values" do
+    RbConfig::LIMITS.each do |key, value|
+      key.should be_kind_of String
+      value.should be_kind_of Numeric
     end
+  end
 
-    it "contains FIXNUM_MIN and FIXNUM_MAX" do
-      RbConfig::LIMITS["FIXNUM_MIN"].should < 0
-      RbConfig::LIMITS["FIXNUM_MAX"].should > 0
-    end
+  it "contains FIXNUM_MIN and FIXNUM_MAX" do
+    RbConfig::LIMITS["FIXNUM_MIN"].should < 0
+    RbConfig::LIMITS["FIXNUM_MAX"].should > 0
+  end
 
-    it "contains CHAR_MIN and CHAR_MAX" do
-      RbConfig::LIMITS["CHAR_MIN"].should <= 0
-      RbConfig::LIMITS["CHAR_MAX"].should > 0
-    end
+  it "contains CHAR_MIN and CHAR_MAX" do
+    RbConfig::LIMITS["CHAR_MIN"].should <= 0
+    RbConfig::LIMITS["CHAR_MAX"].should > 0
+  end
 
-    it "contains SHRT_MIN and SHRT_MAX" do
-      RbConfig::LIMITS["SHRT_MIN"].should == -32768
-      RbConfig::LIMITS["SHRT_MAX"].should == 32767
-    end
+  it "contains SHRT_MIN and SHRT_MAX" do
+    RbConfig::LIMITS["SHRT_MIN"].should == -32768
+    RbConfig::LIMITS["SHRT_MAX"].should == 32767
+  end
 
-    it "contains INT_MIN and INT_MAX" do
-      RbConfig::LIMITS["INT_MIN"].should < 0
-      RbConfig::LIMITS["INT_MAX"].should > 0
-    end
+  it "contains INT_MIN and INT_MAX" do
+    RbConfig::LIMITS["INT_MIN"].should < 0
+    RbConfig::LIMITS["INT_MAX"].should > 0
+  end
 
-    it "contains LONG_MIN and LONG_MAX" do
-      RbConfig::LIMITS["LONG_MIN"].should < 0
-      RbConfig::LIMITS["LONG_MAX"].should > 0
-    end
+  it "contains LONG_MIN and LONG_MAX" do
+    RbConfig::LIMITS["LONG_MIN"].should < 0
+    RbConfig::LIMITS["LONG_MAX"].should > 0
   end
 end
diff --git a/spec/ruby/library/rbconfig/unicode_version_spec.rb b/spec/ruby/library/rbconfig/unicode_version_spec.rb
index 44216700c8..65bd70c242 100644
--- a/spec/ruby/library/rbconfig/unicode_version_spec.rb
+++ b/spec/ruby/library/rbconfig/unicode_version_spec.rb
@@ -2,12 +2,6 @@ require_relative '../../spec_helper'
 require 'rbconfig'
 
 describe "RbConfig::CONFIG['UNICODE_VERSION']" do
-  ruby_version_is ""..."2.5" do
-    it "is 9.0.0 for Ruby 2.4" do
-      RbConfig::CONFIG['UNICODE_VERSION'].should == "9.0.0"
-    end
-  end
-
   ruby_version_is "2.5"..."2.6" do
     it "is 10.0.0 for Ruby 2.5" do
       RbConfig::CONFIG['UNICODE_VERSION'].should == "10.0.0"
diff --git a/spec/ruby/library/set/case_compare_spec.rb b/spec/ruby/library/set/case_compare_spec.rb
index 193006dbda..70d392a27d 100644
--- a/spec/ruby/library/set/case_compare_spec.rb
+++ b/spec/ruby/library/set/case_compare_spec.rb
@@ -2,13 +2,11 @@ require_relative '../../spec_helper'
 require_relative 'shared/include'
 require 'set'
 
-ruby_version_is "2.5" do
-  describe "Set#===" do
-    it_behaves_like :set_include, :===
+describe "Set#===" do
+  it_behaves_like :set_include, :===
 
-    it "is an alias for include?" do
-      set = Set.new
-      set.method(:===).should == set.method(:include?)
-    end
+  it "is an alias for include?" do
+    set = Set.new
+    set.method(:===).should == set.method(:include?)
   end
 end
diff --git a/spec/ruby/library/set/case_equality_spec.rb b/spec/ruby/library/set/case_equality_spec.rb
index 875630612e..10cbfd380a 100644
--- a/spec/ruby/library/set/case_equality_spec.rb
+++ b/spec/ruby/library/set/case_equality_spec.rb
@@ -2,8 +2,6 @@ require_relative '../../spec_helper'
 require_relative 'shared/include'
 require 'set'
 
-ruby_version_is "2.5" do
-  describe "Set#===" do
-    it_behaves_like :set_include, :===
-  end
+describe "Set#===" do
+  it_behaves_like :set_include, :===
 end
diff --git a/spec/ruby/library/set/sortedset/case_equality_spec.rb b/spec/ruby/library/set/sortedset/case_equality_spec.rb
index 5627917677..48e3735c8e 100644
--- a/spec/ruby/library/set/sortedset/case_equality_spec.rb
+++ b/spec/ruby/library/set/sortedset/case_equality_spec.rb
@@ -2,8 +2,6 @@ require_relative '../../../spec_helper'
 require_relative 'shared/include'
 require 'set'
 
-ruby_version_is "2.5" do
-  describe "SortedSet#===" do
-    it_behaves_like :sorted_set_include, :===
-  end
+describe "SortedSet#===" do
+  it_behaves_like :sorted_set_include, :===
 end
diff --git a/spec/ruby/library/set/to_s_spec.rb b/spec/ruby/library/set/to_s_spec.rb
index ca2806d669..7b9f7b6603 100644
--- a/spec/ruby/library/set/to_s_spec.rb
+++ b/spec/ruby/library/set/to_s_spec.rb
@@ -1,13 +1,11 @@
 require_relative 'shared/inspect'
 require 'set'
 
-ruby_version_is "2.5" do
-  describe "Set#to_s" do
-    it_behaves_like :set_inspect, :to_s
+describe "Set#to_s" do
+  it_behaves_like :set_inspect, :to_s
 
-    it "is an alias of inspect" do
-      set = Set.new
-      set.method(:to_s).should == set.method(:inspect)
-    end
+  it "is an alias of inspect" do
+    set = Set.new
+    set.method(:to_s).should == set.method(:inspect)
   end
 end
diff --git a/spec/ruby/library/socket/basicsocket/read_nonblock_spec.rb b/spec/ruby/library/socket/basicsocket/read_nonblock_spec.rb
index 1823f3d75d..4986fffbc5 100644
--- a/spec/ruby/library/socket/basicsocket/read_nonblock_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/read_nonblock_spec.rb
@@ -1,45 +1,43 @@
 require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-ruby_version_is "2.5" do
-  describe "BasicSocket#read_nonblock" do
-    SocketSpecs.each_ip_protocol do |family, ip_address|
-      before :each do
-        @r = Socket.new(family, :DGRAM)
-        @w = Socket.new(family, :DGRAM)
+describe "BasicSocket#read_nonblock" do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before :each do
+      @r = Socket.new(family, :DGRAM)
+      @w = Socket.new(family, :DGRAM)
 
-        @r.bind(Socket.pack_sockaddr_in(0, ip_address))
-        @w.send("aaa", 0, @r.getsockname)
-      end
+      @r.bind(Socket.pack_sockaddr_in(0, ip_address))
+      @w.send("aaa", 0, @r.getsockname)
+    end
 
-      after :each do
-        @r.close unless @r.closed?
-        @w.close unless @w.closed?
-      end
+    after :each do
+      @r.close unless @r.closed?
+      @w.close unless @w.closed?
+    end
 
-      it "receives data after it's ready" do
-        IO.select([@r], nil, nil, 2)
-        @r.recv_nonblock(5).should == "aaa"
-      end
+    it "receives data after it's ready" do
+      IO.select([@r], nil, nil, 2)
+      @r.recv_nonblock(5).should == "aaa"
+    end
 
-      platform_is :linux do
-        it 'does not set the IO in nonblock mode' do
-          require 'io/nonblock'
-          @r.nonblock?.should == false
-          IO.select([@r], nil, nil, 2)
-          @r.read_nonblock(3).should == "aaa"
-          @r.nonblock?.should == false
-        end
+    platform_is :linux do
+      it 'does not set the IO in nonblock mode' do
+        require 'io/nonblock'
+        @r.nonblock?.should == false
+        IO.select([@r], nil, nil, 2)
+        @r.read_nonblock(3).should == "aaa"
+        @r.nonblock?.should == false
       end
+    end
 
-      platform_is_not :linux, :windows do
-        it 'sets the IO in nonblock mode' do
-          require 'io/nonblock'
-          @r.nonblock?.should == false
-          IO.select([@r], nil, nil, 2)
-          @r.read_nonblock(3).should == "aaa"
-          @r.nonblock?.should == true
-        end
+    platform_is_not :linux, :windows do
+      it 'sets the IO in nonblock mode' do
+        require 'io/nonblock'
+        @r.nonblock?.should == false
+        IO.select([@r], nil, nil, 2)
+        @r.read_nonblock(3).should == "aaa"
+        @r.nonblock?.should == true
       end
     end
   end
diff --git a/spec/ruby/library/socket/basicsocket/write_nonblock_spec.rb b/spec/ruby/library/socket/basicsocket/write_nonblock_spec.rb
index f2e7366eb1..95ec08a6c7 100644
--- a/spec/ruby/library/socket/basicsocket/write_nonblock_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/write_nonblock_spec.rb
@@ -1,44 +1,42 @@
 require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-ruby_version_is "2.5" do
-  describe "BasicSocket#write_nonblock" do
-    SocketSpecs.each_ip_protocol do |family, ip_address|
-      before :each do
-        @r = Socket.new(family, :DGRAM)
-        @w = Socket.new(family, :DGRAM)
+describe "BasicSocket#write_nonblock" do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before :each do
+      @r = Socket.new(family, :DGRAM)
+      @w = Socket.new(family, :DGRAM)
 
-        @r.bind(Socket.pack_sockaddr_in(0, ip_address))
-        @w.connect(@r.getsockname)
-      end
+      @r.bind(Socket.pack_sockaddr_in(0, ip_address))
+      @w.connect(@r.getsockname)
+    end
 
-      after :each do
-        @r.close unless @r.closed?
-        @w.close unless @w.closed?
-      end
+    after :each do
+      @r.close unless @r.closed?
+      @w.close unless @w.closed?
+    end
 
-      it "sends data" do
-        @w.write_nonblock("aaa").should == 3
-        IO.select([@r], nil, nil, 2)
-        @r.recv_nonblock(5).should == "aaa"
-      end
+    it "sends data" do
+      @w.write_nonblock("aaa").should == 3
+      IO.select([@r], nil, nil, 2)
+      @r.recv_nonblock(5).should == "aaa"
+    end
 
-      platform_is :linux do
-        it 'does not set the IO in nonblock mode' do
-          require 'io/nonblock'
-          @w.nonblock?.should == false
-          @w.write_nonblock("aaa").should == 3
-          @w.nonblock?.should == false
-        end
+    platform_is :linux do
+      it 'does not set the IO in nonblock mode' do
+        require 'io/nonblock'
+        @w.nonblock?.should == false
+        @w.write_nonblock("aaa").should == 3
+        @w.nonblock?.should == false
       end
+    end
 
-      platform_is_not :linux, :windows do
-        it 'sets the IO in nonblock mode' do
-          require 'io/nonblock'
-          @w.nonblock?.should == false
-          @w.write_nonblock("aaa").should == 3
-          @w.nonblock?.should == true
-        end
+    platform_is_not :linux, :windows do
+      it 'sets the IO in nonblock mode' do
+        require 'io/nonblock'
+        @w.nonblock?.should == false
+        @w.write_nonblock("aaa").should == 3
+        @w.nonblock?.should == true
       end
     end
   end
diff --git a/spec/ruby/library/socket/udpsocket/inspect_spec.rb b/spec/ruby/library/socket/udpsocket/inspect_spec.rb
index 201e8b3fc6..e212120b14 100644
--- a/spec/ruby/library/socket/udpsocket/inspect_spec.rb
+++ b/spec/ruby/library/socket/udpsocket/inspect_spec.rb
@@ -10,16 +10,8 @@ describe 'UDPSocket#inspect' do
     @socket.close
   end
 
-  ruby_version_is ""..."2.5" do
-    it 'returns a String with the fd' do
-      @socket.inspect.should == "#<UDPSocket:fd #{@socket.fileno}>"
-    end
-  end
-
-  ruby_version_is "2.5" do
-    it 'returns a String with the fd, family, address and port' do
-      port = @socket.addr[1]
-      @socket.inspect.should == "#<UDPSocket:fd #{@socket.fileno}, AF_INET, 127.0.0.1, #{port}>"
-    end
+  it 'returns a String with the fd, family, address and port' do
+    port = @socket.addr[1]
+    @socket.inspect.should == "#<UDPSocket:fd #{@socket.fileno}, AF_INET, 127.0.0.1, #{port}>"
   end
 end
diff --git a/spec/ruby/library/yaml/load_documents_spec.rb b/spec/ruby/library/yaml/load_documents_spec.rb
deleted file mode 100644
index 27edbcaa86..0000000000
--- a/spec/ruby/library/yaml/load_documents_spec.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-require_relative '../../spec_helper'
-require_relative 'fixtures/common'
-require_relative 'fixtures/strings'
-require_relative 'shared/each_document'
-
-ruby_version_is ''...'2.5' do
-  describe "YAML.load_documents" do
-    it_behaves_like :yaml_each_document, :load_documents
-  end
-end
diff --git a/spec/ruby/library/yaml/tagurize_spec.rb b/spec/ruby/library/yaml/tagurize_spec.rb
deleted file mode 100644
index cc1b757ce9..0000000000
--- a/spec/ruby/library/yaml/tagurize_spec.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-require_relative '../../spec_helper'
-require_relative 'fixtures/common'
-
-ruby_version_is ''...'2.5' do
-  describe "YAML.tagurize" do
-    it "converts a type_id to a taguri" do
-      YAML.tagurize('wtf').should == "tag:yaml.org,2002:wtf"
-      YAML.tagurize(1).should == 1
-    end
-  end
-end