diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 1d7f66c28..67503bab1 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2017-02-19 15:40:46 -0500 using RuboCop version 0.47.1.
+# on 2017-02-27 18:05:03 +0000 using RuboCop version 0.47.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -25,11 +25,11 @@ Metrics/BlockNesting:
 Metrics/ClassLength:
   Max: 281
 
-# Offense count: 26
+# Offense count: 28
 Metrics/CyclomaticComplexity:
   Max: 14
 
-# Offense count: 993
+# Offense count: 994
 # Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
 # URISchemes: http, https
 Metrics/LineLength:
@@ -45,9 +45,9 @@ Metrics/MethodLength:
 Metrics/ModuleLength:
   Max: 212
 
-# Offense count: 16
+# Offense count: 19
 Metrics/PerceivedComplexity:
-  Max: 14
+  Max: 16
 
 # Offense count: 2
 Style/IdenticalConditionalBranches:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd1576850..b9ada4619 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 * [#1561](https://github.com/ruby-grape/grape/pull/1561): Fix performance issue introduced by duplicated calls in StackableValue#[] - [@brucehsu](https://github.com/brucehsu).
 * [#1564](https://github.com/ruby-grape/grape/pull/1564): Fix declared params bug with nested namespaces - [@bmarini](https://github.com/bmarini).
 * [#1567](https://github.com/ruby-grape/grape/pull/1567): Fix values validator when value is empty array and apply except to input array - [@jlfaber](https://github.com/jlfaber).
+* [#1583](https://github.com/ruby-grape/grape/pull/1583): Fix spec warnings - [@axfcampos](https://github.com/axfcampos).
 * Your contribution here.
 
 ### 0.19.1 (1/9/2017)
diff --git a/lib/grape/dsl/helpers.rb b/lib/grape/dsl/helpers.rb
index 9d2200a7c..c28b89925 100644
--- a/lib/grape/dsl/helpers.rb
+++ b/lib/grape/dsl/helpers.rb
@@ -78,7 +78,7 @@ def api_changed(new_api)
         protected
 
         def process_named_params
-          return unless @named_params && @named_params.any?
+          return unless defined?(@named_params) && @named_params && @named_params.any?
           api.namespace_stackable(:named_params, @named_params)
         end
       end
diff --git a/lib/grape/dsl/inside_route.rb b/lib/grape/dsl/inside_route.rb
index 0e771504a..681f6d127 100644
--- a/lib/grape/dsl/inside_route.rb
+++ b/lib/grape/dsl/inside_route.rb
@@ -144,12 +144,12 @@ def status(status = nil)
         when Integer
           @status = status
         when nil
-          return @status if @status
+          return @status if defined?(@status) && @status
           case request.request_method.to_s.upcase
           when Grape::Http::Headers::POST
             201
           when Grape::Http::Headers::DELETE
-            if @body.present?
+            if defined?(@body) && @body.present?
               200
             else
               204
@@ -199,7 +199,7 @@ def body(value = nil)
         elsif value == false
           @body = ''
           status 204
-        else
+        elsif defined?(@body)
           @body
         end
       end
@@ -233,7 +233,7 @@ def file(value = nil)
         elsif !value.is_a?(NilClass)
           warn '[DEPRECATION] Argument as FileStreamer-like object is deprecated. Use path to file instead.'
           @file = Grape::ServeFile::FileResponse.new(value)
-        else
+        elsif defined?(@file)
           @file
         end
       end
@@ -294,8 +294,8 @@ def present(*args)
 
         representation = { root => representation } if root
         if key
-          representation = (@body || {}).merge(key => representation)
-        elsif entity_class.present? && @body
+          representation = ((defined?(@body) && @body) || {}).merge(key => representation)
+        elsif entity_class.present? && defined?(@body) && @body
           raise ArgumentError, "Representation of type #{representation.class} cannot be merged." unless representation.respond_to?(:merge)
           representation = @body.merge(representation)
         end
diff --git a/lib/grape/dsl/parameters.rb b/lib/grape/dsl/parameters.rb
index 7d3986ac0..4fd2e7afc 100644
--- a/lib/grape/dsl/parameters.rb
+++ b/lib/grape/dsl/parameters.rb
@@ -99,7 +99,7 @@ def requires(*attrs, &block)
 
         opts = attrs.extract_options!.clone
         opts[:presence] = { value: true, message: opts[:message] }
-        opts = @group.merge(opts) if @group
+        opts = @group.merge(opts) if defined?(@group) && @group
 
         if opts[:using]
           require_required_and_optional_fields(attrs.first, opts)
@@ -119,7 +119,7 @@ def optional(*attrs, &block)
 
         opts = attrs.extract_options!.clone
         type = opts[:type]
-        opts = @group.merge(opts) if @group
+        opts = @group.merge(opts) if defined?(@group) && @group
 
         # check type for optional parameter group
         if attrs && block_given?
@@ -209,8 +209,8 @@ def map_params(params, element)
       # @return hash of parameters relevant for the current scope
       # @api private
       def params(params)
-        params = @parent.params(params) if @parent
-        params = map_params(params, @element) if @element
+        params = @parent.params(params) if defined?(@parent) && @parent
+        params = map_params(params, @element) if defined?(@element) && @element
         params
       end
     end
diff --git a/lib/grape/dsl/routing.rb b/lib/grape/dsl/routing.rb
index 24b9d5f3a..369597628 100644
--- a/lib/grape/dsl/routing.rb
+++ b/lib/grape/dsl/routing.rb
@@ -49,7 +49,7 @@ def version(*args, &block)
             end
           end
 
-          @versions.last unless @versions.nil?
+          @versions.last if defined?(@versions) && @versions
         end
 
         # Define a root URL prefix for your entire API.
@@ -159,8 +159,8 @@ def route(methods, paths = ['/'], route_options = {}, &block)
         def namespace(space = nil, options = {}, &block)
           if space || block_given?
             within_namespace do
-              previous_namespace_description = @namespace_description
-              @namespace_description = (@namespace_description || {}).deep_merge(namespace_setting(:description) || {})
+              previous_namespace_description = defined?(@namespace_description) && @namespace_description
+              @namespace_description = ((defined?(@namespace_description) && @namespace_description) || {}).deep_merge(namespace_setting(:description) || {})
               nest(block) do
                 if space
                   namespace_stackable(:namespace, Namespace.new(space, options))
diff --git a/lib/grape/validations/validators/values.rb b/lib/grape/validations/validators/values.rb
index 1926bc902..e4269c3fd 100644
--- a/lib/grape/validations/validators/values.rb
+++ b/lib/grape/validations/validators/values.rb
@@ -9,6 +9,7 @@ def initialize(attrs, options, required, scope, opts = {})
           raise ArgumentError, 'proc must be a Proc' if @proc && !@proc.is_a?(Proc)
         else
           @values = options
+          @excepts = @proc = nil
         end
         super
       end
diff --git a/spec/grape/dsl/parameters_spec.rb b/spec/grape/dsl/parameters_spec.rb
index a0fae5f66..ee45c1868 100644
--- a/spec/grape/dsl/parameters_spec.rb
+++ b/spec/grape/dsl/parameters_spec.rb
@@ -50,19 +50,21 @@ def extract_message_option(attrs)
       describe '#use' do
         before do
           allow_message_expectations_on_nil
-          allow(subject.api).to receive(:namespace_stackable).with(:named_params)
+          subject.api = api
+          allow(api).to receive(:namespace_stackable).with(:named_params)
         end
+        let(:api) { double('api') }
         let(:options) { { option: 'value' } }
         let(:named_params) { { params_group: proc {} } }
 
         it 'calls processes associated with named params' do
-          allow(subject.api).to receive(:namespace_stackable_with_hash).and_return(named_params)
+          allow(api).to receive(:namespace_stackable_with_hash).and_return(named_params)
           expect(subject).to receive(:instance_exec).with(options).and_yield
           subject.use :params_group, options
         end
 
         it 'raises error when non-existent named param is called' do
-          allow(subject.api).to receive(:namespace_stackable_with_hash).and_return({})
+          allow(api).to receive(:namespace_stackable_with_hash).and_return({})
           expect { subject.use :params_group }.to raise_error('Params :params_group not found!')
         end
       end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index e00fba228..cdd0b742c 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -20,6 +20,8 @@
   config.raise_errors_for_deprecations!
 
   config.before(:each) { Grape::Util::InheritableSetting.reset_global! }
+
+  config.warnings = true
 end
 
 require 'coveralls'