diff --git a/Changelog.md b/Changelog.md
index c4253411b3..598fcc0356 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -16,6 +16,14 @@ Breaking Changes for 3.0.0:
   are handled by methods matching the names on formatters. This allows
   us to add or remove notifications without breaking existing formatters.
   (Jon Rowe)
+* Remove support for deprecated `:alias` option for
+  `RSpec.configuration.add_setting`. (Myron Marston)
+* Remove support for deprecated `RSpec.configuration.requires = [...]`.
+  (Myron Marston)
+* Remove support for deprecated `--formatter` CLI option. (Myron Marston)
+* Remove support for deprecated `--configure` CLI option. (Myron Marston)
+* Remove support for deprecated `RSpec::Core::RakeTask#spec_opts=`.
+  (Myron Marston)
 
 Enhancements:
 
diff --git a/lib/rspec/core.rb b/lib/rspec/core.rb
index 62a5368db2..7b440fc9a5 100644
--- a/lib/rspec/core.rb
+++ b/lib/rspec/core.rb
@@ -85,20 +85,6 @@ def self.reset
   # @see RSpec.configure
   # @see Core::Configuration
   def self.configuration
-    if block_given?
-      RSpec.warn_deprecation <<-WARNING
-
-*****************************************************************
-DEPRECATION WARNING
-
-* RSpec.configuration with a block is deprecated and has no effect.
-* please use RSpec.configure with a block instead.
-
-Called from #{CallerFilter.first_non_rspec_line}
-*****************************************************************
-
-WARNING
-    end
     @configuration ||= begin
                          config = RSpec::Core::Configuration.new
                          config.expose_dsl_globally = true
diff --git a/lib/rspec/core/configuration.rb b/lib/rspec/core/configuration.rb
index 2bf7a579d9..28e5e7da8d 100644
--- a/lib/rspec/core/configuration.rb
+++ b/lib/rspec/core/configuration.rb
@@ -41,11 +41,6 @@ def self.define_reader(name)
         end
       end
 
-      # @private
-      def self.deprecate_alias_key
-        RSpec.deprecate("add_setting with :alias option", :replacement => ":alias_with")
-      end
-
       # @private
       def self.define_aliases(name, alias_name)
         alias_method alias_name, name
@@ -64,13 +59,9 @@ def self.define_predicate_for(*names)
       # `Configuration` instance rather than this class method.
       def self.add_setting(name, opts={})
         raise "Use the instance add_setting method if you want to set a default" if opts.has_key?(:default)
-        if opts[:alias]
-          deprecate_alias_key
-          define_aliases(opts[:alias], name)
-        else
-          attr_writer name
-          add_read_only_setting name
-        end
+        attr_writer name
+        add_read_only_setting name
+
         Array(opts[:alias_with]).each do |alias_name|
           define_aliases(name, alias_name)
         end
@@ -559,13 +550,6 @@ def libs=(libs)
         end
       end
 
-      def requires=(paths)
-        RSpec.deprecate("RSpec::Core::Configuration#requires=(paths)",
-                        :replacement => "paths.each {|path| require path}")
-        paths.map {|path| require path}
-        @requires += paths
-      end
-
       # Run examples defined on `line_numbers` in all files to run.
       def line_numbers=(line_numbers)
         filter_run :line_numbers => line_numbers.map{|l| l.to_i}
diff --git a/lib/rspec/core/option_parser.rb b/lib/rspec/core/option_parser.rb
index 5c20a27c9b..54dee92133 100644
--- a/lib/rspec/core/option_parser.rb
+++ b/lib/rspec/core/option_parser.rb
@@ -26,9 +26,6 @@ def parse(args)
     def convert_deprecated_args(args)
       args.map! { |arg|
         case arg
-        when "--formatter"
-          RSpec.deprecate("the --formatter option", :replacement => "-f or --format")
-          "--format"
         when "--default_path"
           "--default-path"
         when "--line_number"
@@ -100,11 +97,6 @@ def parser(options)
           exit
         end
 
-        parser.on('--configure', 'Deprecated. Use --init instead.') do |cmd|
-          RSpec.warning "--configure is deprecated with no effect. Use --init instead.", :call_site => nil
-          exit
-        end
-
         parser.separator("\n  **** Output ****\n\n")
 
         parser.on('-f', '--format FORMATTER', 'Choose a formatter.',
diff --git a/lib/rspec/core/rake_task.rb b/lib/rspec/core/rake_task.rb
index 9f1c2b42ef..649923672d 100644
--- a/lib/rspec/core/rake_task.rb
+++ b/lib/rspec/core/rake_task.rb
@@ -54,18 +54,6 @@ class RakeTask < ::Rake::TaskLib
       #   nil
       attr_accessor :rspec_opts
 
-      # @deprecated
-      # Use rspec_opts instead.
-      #
-      # Command line options to pass to rspec.
-      #
-      # default:
-      #   nil
-      def spec_opts=(opts)
-        RSpec.deprecate('RSpec::Core::RakeTask#spec_opts=', :replacement => 'rspec_opts=')
-        @rspec_opts = opts
-      end
-
       def initialize(*args, &task_block)
         setup_ivars(args)
 
diff --git a/spec/rspec/core/configuration_spec.rb b/spec/rspec/core/configuration_spec.rb
index 308bd58dce..9f7790c891 100644
--- a/spec/rspec/core/configuration_spec.rb
+++ b/spec/rspec/core/configuration_spec.rb
@@ -7,15 +7,6 @@ module RSpec::Core
 
     let(:config) { Configuration.new }
 
-    describe "RSpec.configuration with a block" do
-      before { allow(RSpec).to receive(:warn_deprecation) }
-
-      it "is deprecated" do
-        expect(RSpec).to receive(:warn_deprecation)
-        RSpec.configuration {}
-      end
-    end
-
     describe '#deprecation_stream' do
       it 'defaults to standard error' do
         expect($rspec_core_without_stderr_monkey_patch.deprecation_stream).to eq STDERR
@@ -1030,22 +1021,6 @@ def metadata_hash(*args)
       end
     end
 
-    describe "#requires=" do
-      before { expect(RSpec).to receive :deprecate }
-
-      it "requires the configured files" do
-        expect(config).to receive(:require).with('foo').ordered
-        expect(config).to receive(:require).with('bar').ordered
-        config.requires = ['foo', 'bar']
-      end
-
-      it "stores require paths" do
-        expect(config).to receive(:require).with("a/path")
-        config.requires = ["a/path"]
-        expect(config.requires).to eq ['a/path']
-      end
-    end
-
     describe "#add_setting" do
       describe "with no modifiers" do
         context "with no additional options" do
@@ -1097,14 +1072,6 @@ def metadata_hash(*args)
         end
       end
 
-      context "with :alias => " do
-        it "is deprecated" do
-          expect(RSpec)::to receive(:deprecate).with(/:alias option/, :replacement => ":alias_with")
-          config.add_setting :custom_option
-          config.add_setting :another_custom_option, :alias => :custom_option
-        end
-      end
-
       context "with :alias_with => " do
         before do
           config.add_setting :custom_option, :alias_with => :another_custom_option
diff --git a/spec/rspec/core/example_group_spec.rb b/spec/rspec/core/example_group_spec.rb
index 892b11ff83..af0972f1a5 100644
--- a/spec/rspec/core/example_group_spec.rb
+++ b/spec/rspec/core/example_group_spec.rb
@@ -938,29 +938,31 @@ def extract_execution_results(group)
     end
 
     %w[ fdescribe fcontext ].each do |method_name|
-      def executed_examples_of(group)
-        examples = group.examples.select { |ex| ex.metadata[:execution_result][:started_at] }
-        group.children.inject(examples) { |exs, child| exs + executed_examples_of(child) }
-      end
+      describe ".#{method_name}" do
+        def executed_examples_of(group)
+          examples = group.examples.select { |ex| ex.metadata[:execution_result][:started_at] }
+          group.children.inject(examples) { |exs, child| exs + executed_examples_of(child) }
+        end
 
-      [:focus, :focused].each do |metadata|
-        it "generates an example group that can be filtered with :#{metadata}" do
-          RSpec.configuration.filter_run metadata
+        [:focus, :focused].each do |metadata|
+          it "generates an example group that can be filtered with :#{metadata}" do
+            RSpec.configuration.filter_run metadata
 
-          parent_group = ExampleGroup.describe do
-            describe "not focused" do
-              example("not focused example") { }
-            end
+            parent_group = ExampleGroup.describe do
+              describe "not focused" do
+                example("not focused example") { }
+              end
 
-            send(method_name, "focused") do
-              example("focused example") { }
+              send(method_name, "focused") do
+                example("focused example") { }
+              end
             end
-          end
 
-          parent_group.run
+            parent_group.run
 
-          executed_descriptions = executed_examples_of(parent_group).map(&:description)
-          expect(executed_descriptions).to eq(["focused example"])
+            executed_descriptions = executed_examples_of(parent_group).map(&:description)
+            expect(executed_descriptions).to eq(["focused example"])
+          end
         end
       end
     end
diff --git a/spec/rspec/core/option_parser_spec.rb b/spec/rspec/core/option_parser_spec.rb
index a5b5ebfc62..3e2bc719df 100644
--- a/spec/rspec/core/option_parser_spec.rb
+++ b/spec/rspec/core/option_parser_spec.rb
@@ -45,18 +45,6 @@ module RSpec::Core
       end
     end
 
-    describe "--formatter" do
-      it "is deprecated" do
-        expect(RSpec).to receive(:deprecate)
-        Parser.parse(%w[--formatter doc])
-      end
-
-      it "gets converted to --format" do
-        options = Parser.parse(%w[--formatter doc])
-        expect(options[:formatters].first).to eq(["doc"])
-      end
-    end
-
     describe "--default_path" do
       it "gets converted to --default-path" do
         options = Parser.parse(%w[--default_path foo])