diff --git a/lib/inertia_rails/base_prop.rb b/lib/inertia_rails/base_prop.rb
index 41ba85d..6dcde20 100644
--- a/lib/inertia_rails/base_prop.rb
+++ b/lib/inertia_rails/base_prop.rb
@@ -5,22 +5,12 @@ def initialize(value = nil, &block)
       @block = block
     end
 
-    def call
-      to_proc.call
+    def call(controller)
+      value.respond_to?(:call) ? controller.instance_exec(&value) : value
     end
 
-    private
-
-    def to_proc
-      # This is called by controller.instance_exec, which changes self to the
-      # controller instance. That makes the instance variables unavailable to the
-      # proc via closure. Copying the instance variables to local variables before
-      # the proc is returned keeps them in scope for the returned proc.
-      value = @value
-      return value if value.respond_to?(:call)
-      return Proc.new { value } if value
-
-      @block
+    def value
+      @value.nil? ? @block : @value
     end
   end
 end
diff --git a/lib/inertia_rails/middleware.rb b/lib/inertia_rails/middleware.rb
index 0d0d017..0600149 100644
--- a/lib/inertia_rails/middleware.rb
+++ b/lib/inertia_rails/middleware.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module InertiaRails
   class Middleware
     def initialize(app)
diff --git a/lib/inertia_rails/renderer.rb b/lib/inertia_rails/renderer.rb
index 5662d53..0029196 100644
--- a/lib/inertia_rails/renderer.rb
+++ b/lib/inertia_rails/renderer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'net/http'
 require 'json'
 require_relative "inertia_rails"
@@ -84,12 +86,16 @@ def computed_props
 
       drop_partial_except_keys(_props) if rendering_partial_component?
 
-      deep_transform_values(
-        _props,
-        lambda do |prop|
-          prop.respond_to?(:call) ? controller.instance_exec(&prop) : prop
+      deep_transform_values _props do |prop|
+        case prop
+        when BaseProp
+          prop.call(controller)
+        when Proc
+          controller.instance_exec(&prop)
+        else
+          prop
         end
-      )
+      end
     end
 
     def page
@@ -111,10 +117,10 @@ def page
       default_page
     end
 
-    def deep_transform_values(hash, proc)
-      return proc.call(hash) unless hash.is_a? Hash
+    def deep_transform_values(hash, &block)
+      return block.call(hash) unless hash.is_a? Hash
 
-      hash.transform_values {|value| deep_transform_values(value, proc)}
+      hash.transform_values {|value| deep_transform_values(value, &block)}
     end
 
     def drop_partial_except_keys(hash)
diff --git a/spec/dummy/app/controllers/application_controller.rb b/spec/dummy/app/controllers/application_controller.rb
index 09705d1..5eb9132 100644
--- a/spec/dummy/app/controllers/application_controller.rb
+++ b/spec/dummy/app/controllers/application_controller.rb
@@ -1,2 +1,5 @@
 class ApplicationController < ActionController::Base
+  def controller_method
+    "controller_method value"
+  end
 end
diff --git a/spec/inertia/always_prop_spec.rb b/spec/inertia/always_prop_spec.rb
index 46916b1..7ea0fde 100644
--- a/spec/inertia/always_prop_spec.rb
+++ b/spec/inertia/always_prop_spec.rb
@@ -1,20 +1,3 @@
 RSpec.describe InertiaRails::AlwaysProp do
-  describe '#call' do
-    subject(:call) { prop.call }
-    let(:prop) { described_class.new('value') }
-
-    it { is_expected.to eq('value') }
-
-    context 'with a callable value' do
-      let(:prop) { described_class.new(-> { 'callable' }) }
-
-      it { is_expected.to eq('callable') }
-    end
-
-    context 'with a block' do
-      let(:prop) { described_class.new { 'block' } }
-
-      it { is_expected.to eq('block') }
-    end
-  end
+  it_behaves_like 'callable prop'
 end
diff --git a/spec/inertia/base_prop_spec.rb b/spec/inertia/base_prop_spec.rb
new file mode 100644
index 0000000..da5451e
--- /dev/null
+++ b/spec/inertia/base_prop_spec.rb
@@ -0,0 +1,3 @@
+RSpec.describe InertiaRails::BaseProp do
+  it_behaves_like 'callable prop'
+end
diff --git a/spec/inertia/defer_prop_spec.rb b/spec/inertia/defer_prop_spec.rb
index b7d6fb6..8727998 100644
--- a/spec/inertia/defer_prop_spec.rb
+++ b/spec/inertia/defer_prop_spec.rb
@@ -1,42 +1,31 @@
 RSpec.describe InertiaRails::DeferProp do
-  describe '#call' do
-    subject(:call) { prop.call }
-    let(:prop) { described_class.new('value') }
+  let(:prop) { described_class.new('value') }
 
-    it { is_expected.to eq('value') }
+  it_behaves_like 'callable prop'
+
+  describe '#group' do
+    subject(:group) { prop.group }
 
     it 'returns the default group' do
-      expect(prop.group).to eq('default')
+      expect(group).to eq('default')
     end
 
-    context "with group" do
+    context "with a custom group" do
       let(:prop) { described_class.new('value', group: 'custom') }
 
       it 'returns the group' do
-        expect(prop.group).to eq('custom')
+        expect(group).to eq('custom')
       end
-    end
-
-    context 'with a callable value' do
-      let(:prop) { described_class.new(-> { 'callable' }) }
 
-      it { is_expected.to eq('callable') }
-
-      context "with group" do
+      context 'with a callable value' do
         let(:prop) { described_class.new(-> { 'callable' }, group: 'custom') }
 
         it 'returns the group' do
-          expect(prop.group).to eq('custom')
+          expect(group).to eq('custom')
         end
       end
-    end
-
-    context 'with a block' do
-      let(:prop) { described_class.new { 'block' } }
 
-      it { is_expected.to eq('block') }
-
-      context "with group" do
+      context 'with a block' do
         let(:prop) { described_class.new(group: 'custom') { 'block' } }
 
         it 'returns the group' do
@@ -44,8 +33,10 @@
         end
       end
     end
+  end
 
-    it 'returns the merge flag' do
+  describe '#merge' do
+    it 'updates the merge value' do
       expect(prop.merge?).to be_falsey
       prop.merge
 
diff --git a/spec/inertia/merge_prop_spec.rb b/spec/inertia/merge_prop_spec.rb
index c5b626d..42e2a57 100644
--- a/spec/inertia/merge_prop_spec.rb
+++ b/spec/inertia/merge_prop_spec.rb
@@ -1,24 +1,11 @@
 RSpec.describe InertiaRails::MergeProp do
-  describe '#call' do
-    subject(:call) { prop.call }
-    let(:prop) { described_class.new('value') }
+  let(:prop) { described_class.new('value') }
 
-    it { is_expected.to eq('value') }
+  describe '#merge?' do
+    subject { prop.merge? }
 
-    context 'with a callable value' do
-      let(:prop) { described_class.new(-> { 'callable' }) }
-
-      it { is_expected.to eq('callable') }
-    end
-
-    context 'with a block' do
-      let(:prop) { described_class.new { 'block' } }
-
-      it { is_expected.to eq('block') }
-    end
-
-    it 'returns the merge flag' do
-      expect(prop.merge?).to eq(true)
-    end
+    it { is_expected.to be(true) }
   end
+
+  it_behaves_like 'callable prop'
 end
diff --git a/spec/inertia/optional_prop_spec.rb b/spec/inertia/optional_prop_spec.rb
index 7130afe..26f11f4 100644
--- a/spec/inertia/optional_prop_spec.rb
+++ b/spec/inertia/optional_prop_spec.rb
@@ -1,21 +1,3 @@
 RSpec.describe InertiaRails::OptionalProp do
-  describe '#call' do
-    context 'with a value' do
-      it 'returns the value' do
-        expect(InertiaRails::OptionalProp.new('thing').call).to eq('thing')
-      end
-    end
-
-    context 'with a callable value' do
-      it 'returns the result of the callable value' do
-        expect(InertiaRails::OptionalProp.new(->{ 'thing' }).call).to eq('thing')
-      end
-    end
-
-    context 'with a block' do
-      it 'returns the result of the block' do
-        expect(InertiaRails::OptionalProp.new {'thing'}.call).to eq('thing')
-      end
-    end
-  end
+  it_behaves_like 'callable prop'
 end
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index f89646e..2843743 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -10,9 +10,8 @@
 abort("The Rails environment is running in production mode!") if Rails.env.production?
 require 'rspec/rails'
 # Require the spec/support directory and its subdirectories.
-Dir[Rails.root.join('spec', 'support', '**', '*.rb')].each { |f| require f }
+Dir[Pathname.new(__dir__).join('support', '**', '*.rb')].each { |f| require f }
 
-require_relative './support/helper_module'
 # Add additional requires below this line. Rails is not loaded until this point!
 # Requires supporting ruby files with custom matchers and macros, etc, in
 # spec/support/ and its subdirectories. Files matching `spec/**/*_spec.rb` are
diff --git a/spec/support/shared_examples.rb b/spec/support/shared_examples.rb
new file mode 100644
index 0000000..90e2248
--- /dev/null
+++ b/spec/support/shared_examples.rb
@@ -0,0 +1,45 @@
+RSpec.shared_examples 'callable prop' do
+  describe '#call' do
+    subject(:call) { prop.call(controller) }
+    let(:prop) { described_class.new('value') }
+    let(:controller) { ApplicationController.new }
+
+    it { is_expected.to eq('value') }
+
+    context 'with a callable value' do
+      let(:prop) { described_class.new(-> { 'callable' }) }
+
+      it { is_expected.to eq('callable') }
+
+      context "with false as value" do
+        let(:prop) { described_class.new(false) }
+
+        it { is_expected.to eq(false) }
+      end
+
+      context "with nil as value" do
+        let(:prop) { described_class.new(nil) }
+
+        it { is_expected.to eq(nil) }
+      end
+
+      context "with dependency on the context of a controller" do
+        let(:prop) { described_class.new(-> { controller_method }) }
+
+        it { is_expected.to eq('controller_method value') }
+      end
+    end
+
+    context 'with a block' do
+      let(:prop) { described_class.new { 'block' } }
+
+      it { is_expected.to eq('block') }
+
+      context "with dependency on the context of a controller" do
+        let(:prop) { described_class.new { controller_method } }
+
+        it { is_expected.to eq('controller_method value') }
+      end
+    end
+  end
+end
\ No newline at end of file