1 files changed, 8 insertions, 22 deletions
diff --git a/spec/ruby/core/module/append_features_spec.rb b/spec/ruby/core/module/append_features_spec.rb
index 8fb3febc04..4d2207330d 100644
--- a/spec/ruby/core/module/append_features_spec.rb
+++ b/spec/ruby/core/module/append_features_spec.rb
@@ -3,18 +3,18 @@ require_relative 'fixtures/classes'
 
 describe "Module#append_features" do
   it "is a private method" do
-    Module.should have_private_instance_method(:append_features)
+    Module.private_instance_methods(false).should.include?(:append_features)
   end
 
   describe "on Class" do
     it "is undefined" do
-      Class.should_not have_private_instance_method(:append_features, true)
+      Class.private_instance_methods(true).should_not.include?(:append_features)
     end
 
     it "raises a TypeError if calling after rebinded to Class" do
       -> {
         Module.instance_method(:append_features).bind(Class.new).call Module.new
-      }.should raise_error(TypeError)
+      }.should.raise(TypeError)
     end
   end
 
@@ -39,37 +39,23 @@ describe "Module#append_features" do
   it "raises an ArgumentError on a cyclic include" do
     -> {
       ModuleSpecs::CyclicAppendA.send(:append_features, ModuleSpecs::CyclicAppendA)
-    }.should raise_error(ArgumentError)
+    }.should.raise(ArgumentError)
 
     -> {
       ModuleSpecs::CyclicAppendB.send(:append_features, ModuleSpecs::CyclicAppendA)
-    }.should raise_error(ArgumentError)
+    }.should.raise(ArgumentError)
 
   end
 
-  ruby_version_is ''...'2.7' do
-    it "copies own tainted status to the given module" do
-      other = Module.new
-      Module.new.taint.send :append_features, other
-      other.tainted?.should be_true
-    end
-
-    it "copies own untrusted status to the given module" do
-      other = Module.new
-      Module.new.untrust.send :append_features, other
-      other.untrusted?.should be_true
-    end
-  end
-
   describe "when other is frozen" do
     before :each do
       @receiver = Module.new
       @other = Module.new.freeze
     end
 
-    it "raises a #{frozen_error_class} before appending self" do
-      -> { @receiver.send(:append_features, @other) }.should raise_error(frozen_error_class)
-      @other.ancestors.should_not include(@receiver)
+    it "raises a FrozenError before appending self" do
+      -> { @receiver.send(:append_features, @other) }.should.raise(FrozenError)
+      @other.ancestors.should_not.include?(@receiver)
     end
   end
 end