diff --git a/src/spectator/dsl/structure_dsl.cr b/src/spectator/dsl/structure_dsl.cr
index 55032cf..329c403 100644
--- a/src/spectator/dsl/structure_dsl.cr
+++ b/src/spectator/dsl/structure_dsl.cr
@@ -16,7 +16,7 @@ module Spectator
           include {{@type.id}}
 
           {% if what.is_a?(Path) || what.is_a?(Generic) %}
-            _described_class {{what}}
+            _spectator_described_class {{what}}
           {% end %}
 
           ::Spectator::DSL::Builder.start_group(
@@ -37,14 +37,10 @@ module Spectator
             {{collection}}
           end
 
-          def %first
-            %collection.first
-          end
-
           @%wrapper : ::Spectator::ValueWrapper
 
           def {{block.args.empty? ? "value".id : block.args.first}}
-            @%wrapper.as(::Spectator::TypedValueWrapper(typeof(%first))).value
+            @%wrapper.as(::Spectator::TypedValueWrapper(typeof(%collection.first))).value
           end
 
           def initialize(locals : Hash(Symbol, ::Spectator::ValueWrapper))
@@ -52,9 +48,7 @@ module Spectator
             @%wrapper = locals[:%group]
           end
 
-          _given_collection Collection%collection, %to_a do
-            {{collection}}
-          end
+          _spectator_given_collection Collection%collection, %to_a, %collection
           %to_a = Collection%collection.new.%to_a
 
           ::Spectator::DSL::Builder.start_given_group(
@@ -69,28 +63,6 @@ module Spectator
         end
       end
 
-      macro _given_collection(class_name, to_a_method_name, &block)
-        class {{class_name.id}}
-          include {{@type.id}}
-
-          def %collection
-            {{block.body}}
-          end
-
-          def %first
-            %collection.first
-          end
-
-          def {{to_a_method_name.id}}
-            Array(::Spectator::ValueWrapper).new.tap do |%array|
-              %collection.each do |%item|
-                %array << ::Spectator::TypedValueWrapper(typeof(%item)).new(%item)
-              end
-            end
-          end
-        end
-      end
-
       macro subject(&block)
         let(:subject) {{block}}
       end
@@ -142,61 +114,21 @@ module Spectator
       end
 
       macro it(description, &block)
-        class Wrapper%example
-          include ::Spectator::DSL::ExampleDSL
-          include {{@type.id}}
-
-          def initialize(locals : Hash(Symbol, ::Spectator::ValueWrapper))
-            super
-          end
-
-          def %run
-            {{block.body}}
-          end
-        end
-
-        class Example%example < ::Spectator::RunnableExample
-          def initialize(group : ::Spectator::ExampleGroup, locals : Hash(Symbol, ::Spectator::ValueWrapper))
-            super
-            @instance = Wrapper%example.new(locals)
-          end
+        _spectator_example_wrapper(Wrapper%example, %run) {{block}}
 
+        _spectator_example(Example%example, Wrapper%example, ::Spectator::RunnableExample, {{description}}) do
           protected def run_instance
             @instance.%run
           end
-
-          def description
-            {{description.is_a?(StringLiteral) ? description : description.stringify}}
-          end
         end
 
         ::Spectator::DSL::Builder.add_example(Example%example)
       end
 
       macro pending(description, &block)
-        class Wrapper%example
-          include ::Spectator::DSL::ExampleDSL
-          include {{@type.id}}
+        _spectator_example_wrapper(Wrapper%example, %run) {{block}}
 
-          def initialize(locals : Hash(Symbol, ::Spectator::ValueWrapper))
-            super
-          end
-
-          def %run
-            {{block.body}}
-          end
-        end
-
-        class Example%example < ::Spectator::PendingExample
-          def initialize(group : ::Spectator::ExampleGroup, locals : Hash(Symbol, ::Spectator::ValueWrapper))
-            super
-            @instance = Wrapper%example.new(locals)
-          end
-
-          def description
-            {{description.is_a?(StringLiteral) ? description : description.stringify}}
-          end
-        end
+        _spectator_example(Example%example, Wrapper%example, ::Spectator::PendingExample, {{description}})
 
         ::Spectator::DSL::Builder.add_example(Example%example)
       end
@@ -205,7 +137,7 @@ module Spectator
         raise NotImplementedError.new("Spectator::DSL#it_behaves_like")
       end
 
-      macro _described_class(what)
+      macro _spectator_described_class(what)
         def described_class
           {{what}}.tap do |thing|
             raise "#{thing} must be a type name to use #described_class or #subject,\
@@ -213,14 +145,60 @@ module Spectator
           end
         end
 
-        _implicit_subject
+        _spectator_implicit_subject
       end
 
-      macro _implicit_subject
+      macro _spectator_implicit_subject
         def subject
           described_class.new
         end
       end
+
+      macro _spectator_given_collection(class_name, to_a_method_name, collection_method_name)
+        class {{class_name.id}}
+          include {{@type.id}}
+
+          def {{to_a_method_name.id}}
+            Array(::Spectator::ValueWrapper).new.tap do |array|
+              {{collection_method_name.id}}.each do |item|
+                array << ::Spectator::TypedValueWrapper(typeof(item)).new(item)
+              end
+            end
+          end
+        end
+      end
+
+      macro _spectator_example_wrapper(class_name, run_method_name, &block)
+        class {{class_name.id}}
+          include ::Spectator::DSL::ExampleDSL
+          include {{@type.id}}
+
+          def initialize(locals : Hash(Symbol, ::Spectator::ValueWrapper))
+            super
+          end
+
+          def {{run_method_name.id}}
+            {{block.body}}
+          end
+        end
+      end
+
+      macro _spectator_example(example_class_name, wrapper_class_name, base_class, description, &block)
+        class {{example_class_name.id}} < {{base_class.id}}
+          def initialize(group : ::Spectator::ExampleGroup, locals : Hash(Symbol, ::Spectator::ValueWrapper))
+            super
+            @instance = {{wrapper_class_name.id}}.new(locals)
+          end
+
+          {% if block.is_a?(Block) %}
+            {{block.body}}
+          {% end %}
+
+          def description
+            {{description.is_a?(StringLiteral) ? description : description.stringify}}
+          end
+        end
+      end
     end
   end
 end