1 files changed, 20 insertions, 0 deletions
diff --git a/spec/ruby/command_line/rubyopt_spec.rb b/spec/ruby/command_line/rubyopt_spec.rb
index 2db42f77ef..ee4e594a1c 100644
--- a/spec/ruby/command_line/rubyopt_spec.rb
+++ b/spec/ruby/command_line/rubyopt_spec.rb
@@ -59,6 +59,26 @@ describe "Processing RUBYOPT" do
     ruby_exe("p $VERBOSE", escape: true).chomp.should == "true"
   end
 
+  ruby_version_is "2.7" do
+    it "suppresses deprecation warnings for '-W:no-deprecated'" do
+      ENV["RUBYOPT"] = '-W:no-deprecated'
+      result = ruby_exe('$; = ""', args: '2>&1')
+      result.should == ""
+    end
+
+    it "suppresses experimental warnings for '-W:no-experimental'" do
+      ENV["RUBYOPT"] = '-W:no-experimental'
+      result = ruby_exe('0 in a', args: '2>&1')
+      result.should == ""
+    end
+
+    it "suppresses deprecation and experimental warnings for '-W:no-deprecated -W:no-experimental'" do
+      ENV["RUBYOPT"] = '-W:no-deprecated -W:no-experimental'
+      result = ruby_exe('($; = "") in a', args: '2>&1')
+      result.should == ""
+    end
+  end
+
   it "requires the file for '-r'" do
     f = fixture __FILE__, "rubyopt"
     ENV["RUBYOPT"] = "-r#{f}"