3 files changed, 49 insertions, 5 deletions
diff --git a/spec/ruby/command_line/dash_upper_w_spec.rb b/spec/ruby/command_line/dash_upper_w_spec.rb
index 31bb976ad2..8343bc08e4 100644
--- a/spec/ruby/command_line/dash_upper_w_spec.rb
+++ b/spec/ruby/command_line/dash_upper_w_spec.rb
@@ -18,3 +18,25 @@ end
 describe "The -W command line option with 2" do
   it_behaves_like :command_line_verbose, "-W2"
 end
+
+ruby_version_is "2.7" do
+  describe "The -W command line option with :no-deprecated" do
+    it "suppresses deprecation warnings" do
+      result = ruby_exe('$; = ""', options: '-w', args: '2>&1')
+      result.should =~ /is deprecated/
+
+      result = ruby_exe('$; = ""', options: '-w -W:no-deprecated', args: '2>&1')
+      result.should == ""
+    end
+  end
+
+  describe "The -W command line option with :no-experimental" do
+    it "suppresses experimental warnings" do
+      result = ruby_exe('0 in a', args: '2>&1')
+      result.should =~ /is experimental/
+
+      result = ruby_exe('0 in a', options: '-W:no-experimental', args: '2>&1')
+      result.should == ""
+    end
+  end
+end
diff --git a/spec/ruby/command_line/feature_spec.rb b/spec/ruby/command_line/feature_spec.rb
index 8848249c64..16e106b37d 100644
--- a/spec/ruby/command_line/feature_spec.rb
+++ b/spec/ruby/command_line/feature_spec.rb
@@ -37,11 +37,13 @@ describe "The --enable and --disable flags" do
     ruby_exe("p 'foo'.frozen?", options: "--disable-frozen-string-literal").chomp.should == "false"
   end
 
-  it "can be used with all for enable" do
-    e = "p [defined?(Gem), defined?(DidYouMean), $VERBOSE, 'foo'.frozen?]"
-    env = {'RUBYOPT' => '-w'}
-    # Use a single variant here because it can be quite slow as it might enable jit, etc
-    ruby_exe(e, options: "--enable-all", env: env).chomp.should == "[\"constant\", \"constant\", true, true]"
+  platform_is_not :darwin do # frequently hangs for >60s on GitHub Actions macos-latest
+    it "can be used with all for enable" do
+      e = "p [defined?(Gem), defined?(DidYouMean), $VERBOSE, 'foo'.frozen?]"
+      env = {'RUBYOPT' => '-w'}
+      # Use a single variant here because it can be quite slow as it might enable jit, etc
+      ruby_exe(e, options: "--enable-all", env: env).chomp.should == "[\"constant\", \"constant\", true, true]"
+    end
   end
 
   it "can be used with all for disable" do
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}"