1 files changed, 32 insertions, 32 deletions
diff --git a/spec/ruby/core/io/foreach_spec.rb b/spec/ruby/core/io/foreach_spec.rb
index c361d27879..015988f9fb 100644
--- a/spec/ruby/core/io/foreach_spec.rb
+++ b/spec/ruby/core/io/foreach_spec.rb
@@ -14,45 +14,45 @@ describe "IO.foreach" do
     IO.foreach(@name) { $..should == @count += 1 }
   end
 
-  describe "when the filename starts with |" do
-    it "gets data from the standard out of the subprocess" do
-      cmd = "|sh -c 'echo hello;echo line2'"
-      platform_is :windows do
-        cmd = "|cmd.exe /C echo hello&echo line2"
-      end
+  ruby_version_is ""..."4.0" do
+    describe "when the filename starts with |" do
+      it "gets data from the standard out of the subprocess" do
+        cmd = "|sh -c 'echo hello;echo line2'"
+        platform_is :windows do
+          cmd = "|cmd.exe /C echo hello&echo line2"
+        end
 
-      suppress_warning do # https://bugs.ruby-lang.org/issues/19630
-        IO.foreach(cmd) { |l| ScratchPad << l }
+        suppress_warning do # https://bugs.ruby-lang.org/issues/19630
+          IO.foreach(cmd) { |l| ScratchPad << l }
+        end
+        ScratchPad.recorded.should == ["hello\n", "line2\n"]
       end
-      ScratchPad.recorded.should == ["hello\n", "line2\n"]
-    end
 
-    platform_is_not :windows do
-      it "gets data from a fork when passed -" do
-        parent_pid = $$
+      platform_is_not :windows do
+        it "gets data from a fork when passed -" do
+          parent_pid = $$
 
-        suppress_warning do # https://bugs.ruby-lang.org/issues/19630
-          IO.foreach("|-") { |l| ScratchPad << l }
-        end
+          suppress_warning do # https://bugs.ruby-lang.org/issues/19630
+            IO.foreach("|-") { |l| ScratchPad << l }
+          end
 
-        if $$ == parent_pid
-          ScratchPad.recorded.should == ["hello\n", "from a fork\n"]
-        else # child
-          puts "hello"
-          puts "from a fork"
-          exit!
+          if $$ == parent_pid
+            ScratchPad.recorded.should == ["hello\n", "from a fork\n"]
+          else # child
+            puts "hello"
+            puts "from a fork"
+            exit!
+          end
         end
       end
     end
 
-    ruby_version_is "3.3" do
-      # https://bugs.ruby-lang.org/issues/19630
-      it "warns about deprecation given a path with a pipe" do
-        cmd = "|echo ok"
-        -> {
-          IO.foreach(cmd).to_a
-        }.should complain(/IO process creation with a leading '\|'/)
-      end
+    # https://bugs.ruby-lang.org/issues/19630
+    it "warns about deprecation given a path with a pipe" do
+      cmd = "|echo ok"
+      -> {
+        IO.foreach(cmd).to_a
+      }.should complain(/IO process creation with a leading '\|'/)
     end
   end
 end
@@ -73,12 +73,12 @@ describe "IO.foreach" do
   it "sets $_ to nil" do
     $_ = "test"
     IO.foreach(@name) { }
-    $_.should be_nil
+    $_.should == nil
   end
 
   describe "when no block is given" do
     it "returns an Enumerator" do
-      IO.foreach(@name).should be_an_instance_of(Enumerator)
+      IO.foreach(@name).should.instance_of?(Enumerator)
       IO.foreach(@name).to_a.should == IOSpecs.lines
     end