diff --git a/spec/factory_bot/strategy_syntax_method_registrar_spec.rb b/spec/factory_bot/strategy_syntax_method_registrar_spec.rb
new file mode 100644
index 000000000..94673a510
--- /dev/null
+++ b/spec/factory_bot/strategy_syntax_method_registrar_spec.rb
@@ -0,0 +1,51 @@
+describe FactoryBot::StrategySyntaxMethodRegistrar do
+  it "defines a singular strategy method" do
+    registrar = FactoryBot::StrategySyntaxMethodRegistrar.new(:test_strategy)
+    registrar.define_strategy_methods
+
+    expect(FactoryBot::Syntax::Methods.method_defined?(:test_strategy)).to be true
+  ensure
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy)
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy_list) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy_list)
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy_pair) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy_pair)
+  end
+
+  it "defines a list strategy method" do
+    registrar = FactoryBot::StrategySyntaxMethodRegistrar.new(:test_strategy2)
+    registrar.define_strategy_methods
+
+    expect(FactoryBot::Syntax::Methods.method_defined?(:test_strategy2_list)).to be true
+  ensure
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy2) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy2)
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy2_list) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy2_list)
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy2_pair) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy2_pair)
+  end
+
+  it "defines a pair strategy method" do
+    registrar = FactoryBot::StrategySyntaxMethodRegistrar.new(:test_strategy3)
+    registrar.define_strategy_methods
+
+    expect(FactoryBot::Syntax::Methods.method_defined?(:test_strategy3_pair)).to be true
+  ensure
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy3) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy3)
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy3_list) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy3_list)
+    FactoryBot::Syntax::Methods.undef_method(:test_strategy3_pair) if FactoryBot::Syntax::Methods.method_defined?(:test_strategy3_pair)
+  end
+
+  it "wraps the block with index when arity is 2" do
+    block = ->(instance, index) { [instance, index] }
+    wrapped = FactoryBot::StrategySyntaxMethodRegistrar.with_index(block, 5)
+
+    expect(wrapped.call("instance")).to eq ["instance", 5]
+  end
+
+  it "returns the original block when arity is not 2" do
+    block = ->(instance) { instance }
+
+    expect(FactoryBot::StrategySyntaxMethodRegistrar.with_index(block, 5)).to eq block
+  end
+
+  it "returns nil when block is nil" do
+    expect(FactoryBot::StrategySyntaxMethodRegistrar.with_index(nil, 5)).to be_nil
+  end
+end