diff --git a/lib/reynard/specification.rb b/lib/reynard/specification.rb
index b589c36..04b6481 100644
--- a/lib/reynard/specification.rb
+++ b/lib/reynard/specification.rb
@@ -60,7 +60,8 @@ def build_body(operation_node, data)
     end
 
     def operation(operation_name)
-      dig('paths').each do |path, operations|
+      dig('paths').each_key do |path|
+        operations = dig('paths', path)
         operations.slice(*VERBS).each do |verb, operation|
           return Operation.new(node: ['paths', path, verb]) if operation_name == operation['operationId']
         end
diff --git a/test/files/openapi/external.yml b/test/files/openapi/external.yml
index fe45b3f..eb82c5f 100644
--- a/test/files/openapi/external.yml
+++ b/test/files/openapi/external.yml
@@ -47,3 +47,5 @@ paths:
             application/json:
               schema:
                 $ref: "schemas/author.yml"
+  /authors:
+    $ref: "./paths/authors.yml#/paths/index"
diff --git a/test/files/openapi/paths/authors.yml b/test/files/openapi/paths/authors.yml
new file mode 100644
index 0000000..15d0071
--- /dev/null
+++ b/test/files/openapi/paths/authors.yml
@@ -0,0 +1,21 @@
+paths:
+  index:
+    get:
+      summary: Fetch authors
+      description: Fetch a list of all authors
+      operationId: listAuthors
+      tags:
+        - authors
+      responses:
+        "200":
+          description: A list of authors
+          content:
+            application/json:
+              schema:
+                $ref: "../schemas/authors.yml"
+        default:
+          description: An error.
+          content:
+            application/json:
+              schema:
+                $ref: "../simple.yml#/components/schemas/Error"
diff --git a/test/files/openapi/schemas/authors.yml b/test/files/openapi/schemas/authors.yml
new file mode 100644
index 0000000..807cf70
--- /dev/null
+++ b/test/files/openapi/schemas/authors.yml
@@ -0,0 +1,6 @@
+type: array
+title: Authors
+description: >-
+  A list of authors of a book.
+items:
+  $ref: "author.yml"
diff --git a/test/reynard/object_builder_test.rb b/test/reynard/object_builder_test.rb
index 57ee43d..3626d94 100644
--- a/test/reynard/object_builder_test.rb
+++ b/test/reynard/object_builder_test.rb
@@ -72,6 +72,31 @@ def setup
     end
   end
 
+  class ExternalRequestPathAndDeepRefsBuilderTest < Reynard::Test
+    def setup
+      @specification = Specification.new(filename: fixture_file('openapi/external.yml'))
+      @inflector = Inflector.new
+    end
+
+    test 'builds a singular record' do
+      operation = @specification.operation('listAuthors')
+      media_type = @specification.media_type(operation.node, '200', 'application/json')
+      schema = @specification.schema(media_type.node)
+      authors = Reynard::ObjectBuilder.new(
+        schema:,
+        inflector: @inflector,
+        parsed_body: [
+          { id: 42, name: 'Jerry Writer', bio: { age: 42 } }
+        ]
+      ).call
+      assert_model_name('AuthorsCollection', authors)
+      authors.each do |author|
+        assert_model_name('Author', author)
+        assert_equal 42, author.id
+      end
+    end
+  end
+
   class TitledObjectBuilderTest < Reynard::Test
     def setup
       @specification = Specification.new(filename: fixture_file('openapi/titled.yml'))
diff --git a/test/reynard/schema/model_naming_test.rb b/test/reynard/schema/model_naming_test.rb
index 2e0e18a..44119c8 100644
--- a/test/reynard/schema/model_naming_test.rb
+++ b/test/reynard/schema/model_naming_test.rb
@@ -49,7 +49,7 @@ class ModelNamingTest < Reynard::Test
     class RegressionModelNamingTest < Reynard::Test
       EXPECTED = {
         'bare' => [],
-        'external' => %w[Author Bio Error Author Bio],
+        'external' => %w[Author Bio Error Author Bio Author Bio Error AuthorsCollection],
         'minimal' => %w[Spaceship SpaceshipCollection],
         'naming' => %w[
           Sector Subsector IndustryGroup Industry NationalIndustry Art NationalIndustry
diff --git a/test/reynard/specification_test.rb b/test/reynard/specification_test.rb
index d14ce0c..04e5452 100644
--- a/test/reynard/specification_test.rb
+++ b/test/reynard/specification_test.rb
@@ -241,6 +241,15 @@ def setup
       @specification = Specification.new(filename: fixture_file('openapi/external.yml'))
     end
 
+    test 'finds an operation, loads media type, and returns schema defined externally in a file' do
+      operation = @specification.operation('listAuthors')
+      media_type = @specification.media_type(operation.node, '200', 'application/json')
+      assert_equal(
+        'array',
+        @specification.dig(*media_type.node, 'schema', 'type')
+      )
+    end
+
     test 'digs into an external file' do
       data = @specification.dig(
         'paths', '/authors/{id}', 'get', 'responses', '200',