1 files changed, 9 insertions, 23 deletions
diff --git a/spec/ruby/library/stringio/append_spec.rb b/spec/ruby/library/stringio/append_spec.rb
index d0cf5550cd..c21ba00508 100644
--- a/spec/ruby/library/stringio/append_spec.rb
+++ b/spec/ruby/library/stringio/append_spec.rb
@@ -3,11 +3,11 @@ require_relative 'fixtures/classes'
 
 describe "StringIO#<< when passed [Object]" do
   before :each do
-    @io = StringIO.new("example")
+    @io = StringIO.new(+"example")
   end
 
   it "returns self" do
-    (@io << "just testing").should equal(@io)
+    (@io << "just testing").should.equal?(@io)
   end
 
   it "writes the passed argument onto self" do
@@ -29,23 +29,9 @@ describe "StringIO#<< when passed [Object]" do
     @io.string.should == "example\000\000\000\000\000\000\000\000just testing"
   end
 
-  ruby_version_is ""..."2.7" do
-    it "taints self's String when the passed argument is tainted" do
-      (@io << "test".taint)
-      @io.string.tainted?.should be_true
-    end
-  end
-
-  ruby_version_is ""..."3.0" do
-    it "does not taint self when the passed argument is tainted" do
-      (@io << "test".taint)
-      @io.tainted?.should be_false
-    end
-  end
-
   it "updates self's position" do
     @io << "test"
-    @io.pos.should eql(4)
+    @io.pos.should.eql?(4)
   end
 
   it "tries to convert the passed argument to a String using #to_s" do
@@ -58,18 +44,18 @@ end
 
 describe "StringIO#<< when self is not writable" do
   it "raises an IOError" do
-    io = StringIO.new("test", "r")
-    -> { io << "test" }.should raise_error(IOError)
+    io = StringIO.new(+"test", "r")
+    -> { io << "test" }.should.raise(IOError)
 
-    io = StringIO.new("test")
+    io = StringIO.new(+"test")
     io.close_write
-    -> { io << "test" }.should raise_error(IOError)
+    -> { io << "test" }.should.raise(IOError)
   end
 end
 
 describe "StringIO#<< when in append mode" do
   before :each do
-    @io = StringIO.new("example", "a")
+    @io = StringIO.new(+"example", "a")
   end
 
   it "appends the passed argument to the end of self, ignoring current position" do
@@ -83,6 +69,6 @@ describe "StringIO#<< when in append mode" do
 
   it "correctly updates self's position" do
     @io << ", testing"
-    @io.pos.should eql(16)
+    @io.pos.should.eql?(16)
   end
 end