diff --git a/spec/shoulda/matchers/active_model/validate_length_of_matcher_spec.rb b/spec/shoulda/matchers/active_model/validate_length_of_matcher_spec.rb
index 0008e8c6..348a621c 100644
--- a/spec/shoulda/matchers/active_model/validate_length_of_matcher_spec.rb
+++ b/spec/shoulda/matchers/active_model/validate_length_of_matcher_spec.rb
@@ -3,10 +3,11 @@ require 'unit_spec_helper'
 describe Shoulda::Matchers::ActiveModel do
   describe '#ensure_length_of' do
     it 'is aliased to #validate_length_of' do
-      matchers.expects(:validate_length_of).with(:attr)
+      allow(matchers).to receive(:validate_length_of)
 
       silence_warnings do
         matchers.ensure_length_of(:attr)
+        expect(matchers).to have_received(:validate_length_of).with(:attr)
       end
     end
   end
diff --git a/spec/unit/shoulda/matchers/action_controller/set_session_matcher_spec.rb b/spec/unit/shoulda/matchers/action_controller/set_session_matcher_spec.rb
index 00ac86f7..f5c032f3 100644
--- a/spec/unit/shoulda/matchers/action_controller/set_session_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/action_controller/set_session_matcher_spec.rb
@@ -47,56 +47,56 @@ describe Shoulda::Matchers::ActionController::SetSessionMatcher do
     end
 
     it 'accepts assigning to the same value in the test context' do
-      context = stub(expected: 'value')
+      context = double(expected: 'value')
 
       expect(controller_with_session(var: 'value')).
         to set_session(:var).in_context(context).to { expected }
     end
 
     it 'rejects assigning to the another value in the test context' do
-      context = stub(expected: 'other')
+      context = double(expected: 'other')
 
       expect(controller_with_session(var: 'unexpected')).
         not_to set_session(:var).in_context(context).to { expected }
     end
 
     it 'accepts assigning nil to another variable in the test context' do
-      context = stub(expected: nil)
+      context = double(expected: nil)
 
       expect(controller_with_session(var: 'hi')).
         to set_session(:other).in_context(context).to { expected }
     end
 
     it 'rejects assigning nil to that variable in the test context' do
-      context = stub(expected: nil)
+      context = double(expected: nil)
 
       expect(controller_with_session(var: 'hi')).
         not_to set_session(:var).in_context(context).to { expected }
     end
 
     it 'accepts assigning nil to a cleared variable in the test context' do
-      context = stub(expected: nil)
+      context = double(expected: nil)
 
       expect(controller_with_session(var: nil)).
         to set_session(:var).in_context(context).to { expected }
     end
 
     it 'accepts assigning false to that variable in the test context' do
-      context = stub(expected: false)
+      context = double(expected: false)
 
       expect(controller_with_session(var: false)).
         to set_session(:var).in_context(context).to { expected }
     end
 
     it 'accepts assigning false to other variable in the test context' do
-      context = stub(expected: false)
+      context = double(expected: false)
 
       expect(controller_with_session(var: false)).
         not_to set_session(:other).in_context(context).to { expected }
     end
 
     it 'accepts assigning false to other variable in the test context' do
-      context = stub(expected: false)
+      context = double(expected: false)
 
       expect(controller_with_session(var: 'hi')).
         not_to set_session(:var).in_context(context).to { expected }
diff --git a/spec/unit/shoulda/matchers/action_controller/strong_parameters_matcher_spec.rb b/spec/unit/shoulda/matchers/action_controller/strong_parameters_matcher_spec.rb
index 17e4f420..3ef0872b 100644
--- a/spec/unit/shoulda/matchers/action_controller/strong_parameters_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/action_controller/strong_parameters_matcher_spec.rb
@@ -261,11 +261,12 @@ describe Shoulda::Matchers::ActionController::StrongParametersMatcher do
     context 'when given :create' do
       it 'POSTs to the controller' do
         controller = ActionController::Base.new
-        context = mock()
-        context.expects(:post).with(:create, {})
+        context = build_context
         matcher = described_class.new([:name]).in_context(context).for(:create)
 
         matcher.matches?(controller)
+
+        expect(context).to have_received(:post).with(:create, {})
       end
     end
 
@@ -273,20 +274,22 @@ describe Shoulda::Matchers::ActionController::StrongParametersMatcher do
       if rails_gte_4_1?
         it 'PATCHes to the controller' do
           controller = ActionController::Base.new
-          context = mock()
-          context.expects(:patch).with(:update, {})
+          context = build_context
           matcher = described_class.new([:name]).in_context(context).for(:update)
 
           matcher.matches?(controller)
+
+          expect(context).to have_received(:patch).with(:update, {})
         end
       else
         it 'PUTs to the controller' do
           controller = ActionController::Base.new
-          context = mock()
-          context.expects(:put).with(:update, {})
+          context = build_context
           matcher = described_class.new([:name]).in_context(context).for(:update)
 
           matcher.matches?(controller)
+
+          expect(context).to have_received(:put).with(:update, {})
         end
       end
     end
@@ -294,13 +297,14 @@ describe Shoulda::Matchers::ActionController::StrongParametersMatcher do
     context 'when given a custom action and verb' do
       it 'calls the action with the verb' do
         controller = ActionController::Base.new
-        context = mock()
-        context.expects(:delete).with(:hide, {})
+        context = build_context
         matcher = described_class.new([:name]).
           in_context(context).
           for(:hide, verb: :delete)
 
         matcher.matches?(controller)
+
+        expect(context).to have_received(:delete).with(:hide, {})
       end
     end
   end
@@ -319,5 +323,9 @@ describe Shoulda::Matchers::ActionController::StrongParametersMatcher do
     end
   end
 
+  def build_context
+    double('context', post: nil, put: nil, patch: nil, delete: nil)
+  end
+
   class SimulatedError < StandardError; end
 end
diff --git a/spec/unit/shoulda/matchers/active_model/disallow_value_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/disallow_value_matcher_spec.rb
index 7725ac14..0731e695 100644
--- a/spec/unit/shoulda/matchers/active_model/disallow_value_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/disallow_value_matcher_spec.rb
@@ -36,8 +36,12 @@ describe Shoulda::Matchers::ActiveModel::DisallowValueMatcher do
     end
 
     it "delegates its failure message to its allow matcher's negative failure message" do
-      allow_matcher = stub_everything(failure_message_when_negated: 'allow matcher failure')
-      Shoulda::Matchers::ActiveModel::AllowValueMatcher.stubs(:new).returns(allow_matcher)
+      allow_matcher = double('allow_matcher',
+        failure_message_when_negated: 'allow matcher failure',
+      ).as_null_object
+      allow(Shoulda::Matchers::ActiveModel::AllowValueMatcher).
+        to receive(:new).
+        and_return(allow_matcher)
 
       matcher = matcher('abcde').for(:attr).with_message('good message')
       matcher.matches?(validating_format(with: /abc/, message: 'good message'))
diff --git a/spec/unit/shoulda/matchers/active_model/helpers_spec.rb b/spec/unit/shoulda/matchers/active_model/helpers_spec.rb
index ab9e174a..1fdfc0a3 100644
--- a/spec/unit/shoulda/matchers/active_model/helpers_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/helpers_spec.rb
@@ -153,6 +153,10 @@ describe Shoulda::Matchers::ActiveModel::Helpers do
     message = options.delete(:message)
     type = options.delete(:type)
 
-    ActiveModel::Errors.any_instance.expects(:generate_message).with(attribute, type, {}).at_least_once.returns(message)
+    expect_any_instance_of(ActiveModel::Errors).
+      to receive(:generate_message).
+      with(attribute, type, {}).
+      at_least(1).
+      and_return(message)
   end
 end
diff --git a/spec/unit/shoulda/matchers/active_model/validate_exclusion_of_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/validate_exclusion_of_matcher_spec.rb
index 914e01fe..3e42f03f 100644
--- a/spec/unit/shoulda/matchers/active_model/validate_exclusion_of_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/validate_exclusion_of_matcher_spec.rb
@@ -3,10 +3,11 @@ require 'unit_spec_helper'
 describe Shoulda::Matchers::ActiveModel do
   describe '#ensure_exclusion_of' do
     it 'is aliased to #validate_exclusion_of' do
-      matchers.expects(:validate_exclusion_of).with(:attr)
+      allow(matchers).to receive(:validate_exclusion_of)
 
       silence_warnings do
         matchers.ensure_exclusion_of(:attr)
+        expect(matchers).to have_received(:validate_exclusion_of).with(:attr)
       end
     end
   end
diff --git a/spec/unit/shoulda/matchers/active_model/validate_inclusion_of_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/validate_inclusion_of_matcher_spec.rb
index 468b684b..c8e52fa2 100644
--- a/spec/unit/shoulda/matchers/active_model/validate_inclusion_of_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/validate_inclusion_of_matcher_spec.rb
@@ -3,10 +3,11 @@ require 'unit_spec_helper'
 describe Shoulda::Matchers::ActiveModel do
   describe '#ensure_inclusion_of' do
     it 'is aliased to #validate_inclusion_of' do
-      matchers.expects(:validate_inclusion_of).with(:attr)
+      allow(matchers).to receive(:validate_inclusion_of)
 
       silence_warnings do
         matchers.ensure_inclusion_of(:attr)
+        expect(matchers).to have_received(:validate_inclusion_of)
       end
     end
   end
diff --git a/spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb
index 78ec6203..fed91793 100644
--- a/spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb
@@ -278,7 +278,7 @@ describe Shoulda::Matchers::ActiveModel::ValidateNumericalityOfMatcher do
         def set_attr!; self.attr = 5 end
       end.new
 
-      subject.stubs(:set_attr!)
+      allow(subject).to receive(:set_attr!)
       expect(subject).to matcher.odd
     end
   end
diff --git a/spec/unit/shoulda/matchers/active_record/association_matchers/model_reflection_spec.rb b/spec/unit/shoulda/matchers/active_record/association_matchers/model_reflection_spec.rb
index 2f158dda..f1f77fd4 100644
--- a/spec/unit/shoulda/matchers/active_record/association_matchers/model_reflection_spec.rb
+++ b/spec/unit/shoulda/matchers/active_record/association_matchers/model_reflection_spec.rb
@@ -7,7 +7,7 @@ describe Shoulda::Matchers::ActiveRecord::AssociationMatchers::ModelReflection d
       belongs_to :country
     end
     delegate_reflection = person_model.reflect_on_association(:country)
-    delegate_reflection.stubs(foo: 'bar')
+    allow(delegate_reflection).to receive(:foo).and_return('bar')
     reflection = described_class.new(delegate_reflection)
 
     expect(reflection.foo).to eq 'bar'
diff --git a/spec/unit/shoulda/matchers/active_record/have_db_index_matcher_spec.rb b/spec/unit/shoulda/matchers/active_record/have_db_index_matcher_spec.rb
index 7aa1560e..3fc1a715 100644
--- a/spec/unit/shoulda/matchers/active_record/have_db_index_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_record/have_db_index_matcher_spec.rb
@@ -65,10 +65,13 @@ describe Shoulda::Matchers::ActiveRecord::HaveDbIndexMatcher do
   end
 
   it 'allows an IndexDefinition to have a truthy value for unique' do
-    index_definition = stub('ActiveRecord::ConnectionAdapters::IndexDefinition',
-      unique: 7, name: :age)
+    index_definition = double(
+      'ActiveRecord::ConnectionAdapters::IndexDefinition',
+      unique: 7,
+      name: :age
+    )
     matcher = have_db_index(:age).unique(true)
-    matcher.stubs(matched_index: index_definition)
+    allow(matcher).to receive(:matched_index).and_return(index_definition)
 
     expect(with_index_on(:age)).to matcher
   end
diff --git a/spec/unit/shoulda/matchers/doublespeak/double_collection_spec.rb b/spec/unit/shoulda/matchers/doublespeak/double_collection_spec.rb
index 43628d42..4c435317 100644
--- a/spec/unit/shoulda/matchers/doublespeak/double_collection_spec.rb
+++ b/spec/unit/shoulda/matchers/doublespeak/double_collection_spec.rb
@@ -4,31 +4,53 @@ module Shoulda::Matchers::Doublespeak
   describe DoubleCollection do
     describe '#register_stub' do
       it 'calls DoubleImplementationRegistry.find correctly' do
+        allow(DoubleImplementationRegistry).to receive(:find)
         double_collection = described_class.new(:klass)
-        DoubleImplementationRegistry.expects(:find).with(:stub)
+
         double_collection.register_stub(:a_method)
+
+        expect(DoubleImplementationRegistry).to have_received(:find).with(:stub)
       end
 
       it 'calls Double.new correctly' do
-        DoubleImplementationRegistry.stubs(:find).returns(:implementation)
+        allow(DoubleImplementationRegistry).
+          to receive(:find).
+          and_return(:implementation)
+        allow(Double).to receive(:new)
         double_collection = described_class.new(:klass)
-        Double.expects(:new).with(:klass, :a_method, :implementation)
+
         double_collection.register_stub(:a_method)
+
+        expect(Double).
+          to have_received(:new).
+          with(:klass, :a_method, :implementation)
       end
     end
 
     describe '#register_proxy' do
       it 'calls DoubleImplementationRegistry.find correctly' do
+        allow(DoubleImplementationRegistry).to receive(:find)
         double_collection = described_class.new(:klass)
-        DoubleImplementationRegistry.expects(:find).with(:proxy)
+
         double_collection.register_proxy(:a_method)
+
+        expect(DoubleImplementationRegistry).
+          to have_received(:find).
+          with(:proxy)
       end
 
       it 'calls Double.new correctly' do
-        DoubleImplementationRegistry.stubs(:find).returns(:implementation)
+        allow(DoubleImplementationRegistry).
+          to receive(:find).
+          and_return(:implementation)
+        allow(Double).to receive(:new)
         double_collection = described_class.new(:klass)
-        Double.expects(:new).with(:klass, :a_method, :implementation)
+
         double_collection.register_proxy(:a_method)
+
+        expect(Double).
+          to have_received(:new).
+          with(:klass, :a_method, :implementation)
       end
     end
 
diff --git a/spec/unit/shoulda/matchers/doublespeak/double_spec.rb b/spec/unit/shoulda/matchers/doublespeak/double_spec.rb
index 2cde3a6e..6cf60ea8 100644
--- a/spec/unit/shoulda/matchers/doublespeak/double_spec.rb
+++ b/spec/unit/shoulda/matchers/doublespeak/double_spec.rb
@@ -6,7 +6,8 @@ module Shoulda::Matchers::Doublespeak
       it 'tells its implementation to call the given block' do
         sent_block = -> { }
         actual_block = nil
-        implementation = stub
+        implementation = build_implementation
+        implementation.singleton_class.__send__(:undef_method, :returns)
         implementation.singleton_class.__send__(:define_method, :returns) do |&block|
           actual_block = block
         end
@@ -16,16 +17,18 @@ module Shoulda::Matchers::Doublespeak
       end
 
       it 'tells its implementation to return the given value' do
-        implementation = mock()
-        implementation.expects(:returns).with(:implementation)
+        implementation = build_implementation
         double = described_class.new(:klass, :a_method, implementation)
         double.to_return(:implementation)
+
+        expect(implementation).to have_received(:returns).with(:implementation)
       end
 
       it 'prefers a block over a non-block' do
         sent_block = -> { }
         actual_block = nil
-        implementation = stub
+        implementation = build_implementation
+        implementation.singleton_class.__send__(:undef_method, :returns)
         implementation.singleton_class.__send__(:define_method, :returns) do |&block|
           actual_block = block
         end
@@ -37,22 +40,25 @@ module Shoulda::Matchers::Doublespeak
 
     describe '#activate' do
       it 'replaces the method with an implementation' do
-        implementation = stub
+        implementation = build_implementation
         klass = create_class(a_method: 42)
         instance = klass.new
         double = described_class.new(klass, :a_method, implementation)
         args = [:any, :args]
         block = -> {}
-        implementation.expects(:call).with(double, instance, args, block)
 
         double.activate
         instance.a_method(*args, &block)
+
+        expect(implementation).
+          to have_received(:call).
+          with(double, instance, args, block)
       end
     end
 
     describe '#deactivate' do
       it 'restores the original method after being doubled' do
-        implementation = stub(call: nil)
+        implementation = build_implementation
         klass = create_class(a_method: 42)
         instance = klass.new
         double = described_class.new(klass, :a_method, implementation)
@@ -63,7 +69,7 @@ module Shoulda::Matchers::Doublespeak
       end
 
       it 'still restores the original method if #activate was called twice' do
-        implementation = stub(call: nil)
+        implementation = build_implementation
         klass = create_class(a_method: 42)
         instance = klass.new
         double = described_class.new(klass, :a_method, implementation)
@@ -75,7 +81,7 @@ module Shoulda::Matchers::Doublespeak
       end
 
       it 'does nothing if the method has not been doubled' do
-        implementation = stub(call: nil)
+        implementation = build_implementation
         klass = create_class(a_method: 42)
         instance = klass.new
         double = described_class.new(klass, :a_method, implementation)
@@ -140,5 +146,9 @@ module Shoulda::Matchers::Doublespeak
         end
       end
     end
+
+    def build_implementation
+      double('implementation', returns: nil, call: nil)
+    end
   end
 end
diff --git a/spec/unit/shoulda/matchers/doublespeak/proxy_implementation_spec.rb b/spec/unit/shoulda/matchers/doublespeak/proxy_implementation_spec.rb
index 8ff99ca1..447dcf9c 100644
--- a/spec/unit/shoulda/matchers/doublespeak/proxy_implementation_spec.rb
+++ b/spec/unit/shoulda/matchers/doublespeak/proxy_implementation_spec.rb
@@ -5,9 +5,10 @@ module Shoulda::Matchers::Doublespeak
     describe '#returns' do
       it 'delegates to its stub_implementation' do
         stub_implementation = build_stub_implementation
-        stub_implementation.expects(:returns).with(:value)
         implementation = described_class.new(stub_implementation)
         implementation.returns(:value)
+
+        expect(stub_implementation).to have_received(:returns).with(:value)
       end
     end
 
@@ -15,26 +16,32 @@ module Shoulda::Matchers::Doublespeak
       it 'delegates to its stub_implementation' do
         stub_implementation = build_stub_implementation
         double = build_double
-        stub_implementation.expects(:call).with(double, :object, :args, :block)
         implementation = described_class.new(stub_implementation)
         implementation.call(double, :object, :args, :block)
+
+        expect(stub_implementation).
+          to have_received(:call).
+          with(double, :object, :args, :block)
       end
 
       it 'calls #call_original_method on the double' do
         stub_implementation = build_stub_implementation
         implementation = described_class.new(stub_implementation)
         double = build_double
-        double.expects(:call_original_method).with(:object, :args, :block)
         implementation.call(double, :object, :args, :block)
+
+        expect(double).
+          to have_received(:call_original_method).
+          with(:object, :args, :block)
       end
     end
 
     def build_stub_implementation
-      stub(returns: nil, call: nil)
+      double('stub_implementation', returns: nil, call: nil)
     end
 
     def build_double
-      stub(call_original_method: nil)
+      double('double', call_original_method: nil)
     end
   end
 end
diff --git a/spec/unit/shoulda/matchers/doublespeak/stub_implementation_spec.rb b/spec/unit/shoulda/matchers/doublespeak/stub_implementation_spec.rb
index 6112fc10..63fe2441 100644
--- a/spec/unit/shoulda/matchers/doublespeak/stub_implementation_spec.rb
+++ b/spec/unit/shoulda/matchers/doublespeak/stub_implementation_spec.rb
@@ -82,7 +82,7 @@ module Shoulda::Matchers::Doublespeak
     end
 
     def build_double
-      stub(record_call: nil)
+      double('double', record_call: nil)
     end
   end
 end
diff --git a/spec/unit/shoulda/matchers/doublespeak/world_spec.rb b/spec/unit/shoulda/matchers/doublespeak/world_spec.rb
index 0db255a7..9352fce7 100644
--- a/spec/unit/shoulda/matchers/doublespeak/world_spec.rb
+++ b/spec/unit/shoulda/matchers/doublespeak/world_spec.rb
@@ -4,16 +4,23 @@ module Shoulda::Matchers::Doublespeak
   describe World do
     describe '#double_collection_for' do
       it 'calls DoubleCollection.new once with the given class' do
-        DoubleCollection.expects(:new).with(:klass).returns(:klass).once
+        allow(DoubleCollection).to receive(:new).and_return(:klass)
         world = described_class.new
+
         world.double_collection_for(:klass)
         world.double_collection_for(:klass)
+
+        expect(DoubleCollection).to have_received(:new).with(:klass).once
       end
 
       it 'returns the created DoubleCollection' do
-        double_collection = Object.new
-        DoubleCollection.stubs(:new).with(:klass).returns(double_collection)
+        double_collection = build_double_collection
+        allow(DoubleCollection).
+          to receive(:new).
+          with(:klass).
+          and_return(double_collection)
         world = described_class.new
+
         expect(world.double_collection_for(:klass)).to be double_collection
       end
     end
@@ -21,50 +28,50 @@ module Shoulda::Matchers::Doublespeak
     describe '#with_doubles_activated' do
       it 'installs all doubles, yields the block, then uninstalls them all' do
         block_called = false
-
-        double_collections = Array.new(3) do
-          stub.tap do |double_collection|
-            sequence = sequence('with_doubles_activated')
-            double_collection.expects(:activate).in_sequence(sequence)
-            double_collection.expects(:deactivate).in_sequence(sequence)
-          end
+        double_collections = Array.new(3) { build_double_collection }
+        double_collections.each do |double_collection|
+          allow(double_collection).to receive(:activate).ordered
         end
-
+        double_collections.each do |double_collection|
+          allow(double_collection).to receive(:deactivate).ordered
+        end
+        klasses = Array.new(3) { |i| "Klass #{i}" }
         world = described_class.new
-
-        DoubleCollection.stubs(:new).
-          with(:klass1).
-          returns(double_collections[0])
-        DoubleCollection.stubs(:new).
-          with(:klass2).
-          returns(double_collections[1])
-        DoubleCollection.stubs(:new).
-          with(:klass3).
-          returns(double_collections[2])
-        world.double_collection_for(:klass1)
-        world.double_collection_for(:klass2)
-        world.double_collection_for(:klass3)
+        double_collections.zip(klasses).each do |double_collection, klass|
+          allow(DoubleCollection).
+            to receive(:new).
+            with(klass).
+            and_return(double_collection)
+          world.double_collection_for(klass)
+        end
 
         world.with_doubles_activated { block_called = true }
 
         expect(block_called).to eq true
+
+        double_collections.each do |double_collection|
+          expect(double_collection).to have_received(:activate)
+          expect(double_collection).to have_received(:deactivate)
+        end
       end
 
       it 'still makes sure to uninstall all doubles even if the block raises an error' do
-        double_collection = stub()
-        double_collection.stubs(:activate)
-        double_collection.expects(:deactivate)
-
+        double_collection = build_double_collection
+        allow(DoubleCollection).to receive(:new).and_return(double_collection)
         world = described_class.new
-
-        DoubleCollection.stubs(:new).returns(double_collection)
         world.double_collection_for(:klass)
 
         begin
           world.with_doubles_activated { raise 'error' }
         rescue RuntimeError
         end
+
+        expect(double_collection).to have_received(:deactivate)
       end
     end
+
+    def build_double_collection
+      double('double_collection', activate: nil, deactivate: nil)
+    end
   end
 end
diff --git a/spec/unit/shoulda/matchers/doublespeak_spec.rb b/spec/unit/shoulda/matchers/doublespeak_spec.rb
index 6a0abe69..6c330faf 100644
--- a/spec/unit/shoulda/matchers/doublespeak_spec.rb
+++ b/spec/unit/shoulda/matchers/doublespeak_spec.rb
@@ -4,15 +4,23 @@ module Shoulda::Matchers
   describe Doublespeak do
     describe '.double_collection_for' do
       it 'delegates to its world' do
-        Doublespeak.world.expects(:double_collection_for).with(:klass)
+        allow(Doublespeak.world).to receive(:double_collection_for)
+
         described_class.double_collection_for(:klass)
+
+        expect(Doublespeak.world).
+          to have_received(:double_collection_for).
+          with(:klass)
       end
     end
 
     describe '.with_doubles_activated' do
       it 'delegates to its world' do
-        Doublespeak.world.expects(:with_doubles_activated)
+        allow(Doublespeak.world).to receive(:with_doubles_activated)
+
         described_class.with_doubles_activated
+
+        expect(Doublespeak.world).to have_received(:with_doubles_activated)
       end
     end
   end
diff --git a/spec/unit_spec_helper.rb b/spec/unit_spec_helper.rb
index 332132f4..147a6737 100644
--- a/spec/unit_spec_helper.rb
+++ b/spec/unit_spec_helper.rb
@@ -22,7 +22,6 @@ monkey_patch_minitest_to_do_nothing
 ENV['BUNDLE_GEMFILE'] ||= app.gemfile_path
 ENV['RAILS_ENV'] = 'test'
 
-require 'bourne'
 require 'shoulda-matchers'
 require 'rspec/rails'
 
@@ -40,11 +39,12 @@ RSpec.configure do |config|
     c.syntax = :expect
   end
 
+  config.mock_with :rspec
+
   if config.respond_to?(:infer_spec_type_from_file_location!)
     config.infer_spec_type_from_file_location!
   end
 
-  config.mock_with :mocha
   config.include Shoulda::Matchers::ActionController, type: :controller
 
   UnitTests::ActiveModelHelpers.configure_example_group(config)