1 files changed, 19 insertions, 16 deletions
diff --git a/spec/ruby/language/proc_spec.rb b/spec/ruby/language/proc_spec.rb
index ef4a43bed6..cc69b7799c 100644
--- a/spec/ruby/language/proc_spec.rb
+++ b/spec/ruby/language/proc_spec.rb
@@ -161,6 +161,18 @@ describe "A Proc" do
     end
   end
 
+  describe "taking |*a, b| arguments" do
+    it "assigns [] to the argument when passed no values" do
+      proc { |*a, b| [a, b] }.call.should == [[], nil]
+    end
+  end
+
+  describe "taking |a, *b, c| arguments" do
+    it "assigns [] to the argument when passed no values" do
+      proc { |a, *b, c| [a, b, c] }.call.should == [nil, [], nil]
+    end
+  end
+
   describe "taking |a, | arguments" do
     before :each do
       @l = lambda { |a, | a }
@@ -223,24 +235,15 @@ describe "A Proc" do
       @p = proc { |*a, **kw| [a, kw] }
     end
 
-    ruby_version_is ""..."2.7" do
-      it 'autosplats keyword arguments' do
-        @p.call([1, {a: 1}]).should == [[1], {a: 1}]
-      end
-    end
-
-    ruby_version_is "2.7"..."3.0" do
-      it 'autosplats keyword arguments and warns' do
-        -> {
-          @p.call([1, {a: 1}]).should == [[1], {a: 1}]
-        }.should complain(/warning: Using the last argument as keyword parameters is deprecated; maybe \*\* should be added to the call/)
-      end
+    it 'does not autosplat keyword arguments' do
+      @p.call([1, {a: 1}]).should == [[[1, {a: 1}]], {}]
     end
+  end
 
-    ruby_version_is "3.0" do
-      it 'does not autosplat keyword arguments' do
-        @p.call([1, {a: 1}]).should == [[[1, {a: 1}]], {}]
-      end
+  describe "taking |required keyword arguments, **kw| arguments" do
+    it "raises ArgumentError for missing required argument" do
+      p = proc { |a:, **kw| [a, kw] }
+      -> { p.call() }.should raise_error(ArgumentError)
     end
   end
 end