1 files changed, 4 insertions, 18 deletions
diff --git a/spec/ruby/core/module/prepend_features_spec.rb b/spec/ruby/core/module/prepend_features_spec.rb
index 2d1fa713b7..3a50f2c2a4 100644
--- a/spec/ruby/core/module/prepend_features_spec.rb
+++ b/spec/ruby/core/module/prepend_features_spec.rb
@@ -3,7 +3,7 @@ require_relative 'fixtures/classes'
 
 describe "Module#prepend_features" do
   it "is a private method" do
-    Module.should have_private_instance_method(:prepend_features, true)
+    Module.private_instance_methods(false).should.include?(:prepend_features)
   end
 
   it "gets called when self is included in another module/class" do
@@ -25,21 +25,7 @@ describe "Module#prepend_features" do
   it "raises an ArgumentError on a cyclic prepend" do
     -> {
       ModuleSpecs::CyclicPrepend.send(:prepend_features, ModuleSpecs::CyclicPrepend)
-    }.should raise_error(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 :prepend_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 :prepend_features, other
-      other.untrusted?.should be_true
-    end
+    }.should.raise(ArgumentError)
   end
 
   it "clears caches of the given module" do
@@ -66,13 +52,13 @@ describe "Module#prepend_features" do
 
   describe "on Class" do
     it "is undefined" do
-      Class.should_not have_private_instance_method(:prepend_features, true)
+      Class.private_instance_methods(true).should_not.include?(:prepend_features)
     end
 
     it "raises a TypeError if calling after rebinded to Class" do
       -> {
         Module.instance_method(:prepend_features).bind(Class.new).call Module.new
-      }.should raise_error(TypeError)
+      }.should.raise(TypeError)
     end
   end
 end