diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 400a0adbcf4e0032f013d6c4fcf2ad6ce62176f3..19ccf75b00d2bb33daeeebd02e81758b15425d1e 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1471,7 +1471,7 @@ def []=(attr_name, value)
       #   user.send(:attributes=, { :username => 'Phusion', :is_admin => true }, false)
       #   user.is_admin?  # => true
       def attributes=(new_attributes, guard_protected_attributes = true)
-        return unless new_attributes.is_a? Hash
+        return unless new_attributes.is_a?(Hash)
         attributes = new_attributes.stringify_keys
 
         multi_parameter_attributes = []
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 46922712668bae2cfa978404c6b115edc373ad33..0593897fa5f23e845628f4deb03472285dcfa7ec 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -11,84 +11,84 @@ module QueryMethods
 
     def includes(*args)
       args.reject! { |a| a.blank? }
-      clone.tap { |r| r.includes_values += args if args.present? }
+      clone.tap {|r| r.includes_values += args if args.present? }
     end
 
     def eager_load(*args)
-      clone.tap { |r| r.eager_load_values += args if args.present? }
+      clone.tap {|r| r.eager_load_values += args if args.present? }
     end
 
     def preload(*args)
-      clone.tap { |r| r.preload_values += args if args.present? }
+      clone.tap {|r| r.preload_values += args if args.present? }
     end
 
     def select(*args)
       if block_given?
-        to_a.select { |*block_args| yield(*block_args) }
+        to_a.select {|*block_args| yield(*block_args) }
       else
-        clone.tap { |r| r.select_values += args if args.present? }
+        clone.tap {|r| r.select_values += args if args.present? }
       end
     end
 
     def group(*args)
-      clone.tap { |r| r.group_values += args if args.present? }
+      clone.tap {|r| r.group_values += args if args.present? }
     end
 
     def order(*args)
-      clone.tap { |r| r.order_values += args if args.present? }
+      clone.tap {|r| r.order_values += args if args.present? }
     end
 
     def reorder(*args)
-      clone.tap { |r| r.order_values = args if args.present? }
+      clone.tap {|r| r.order_values = args if args.present? }
     end
 
     def joins(*args)
       args.flatten!
-      clone.tap { |r| r.joins_values += args if args.present? }
+      clone.tap {|r| r.joins_values += args if args.present? }
     end
 
     def where(*args)
       value = build_where(*args)
-      clone.tap { |r| r.where_values += Array.wrap(value) if value.present? }
+      clone.tap {|r| r.where_values += Array.wrap(value) if value.present? }
     end
 
     def having(*args)
       value = build_where(*args)
-      clone.tap { |r| r.having_values += Array.wrap(value) if value.present? }
+      clone.tap {|r| r.having_values += Array.wrap(value) if value.present? }
     end
 
     def limit(value = true)
-      clone.tap { |r| r.limit_value = value }
+      clone.tap {|r| r.limit_value = value }
     end
 
     def offset(value = true)
-      clone.tap { |r| r.offset_value = value }
+      clone.tap {|r| r.offset_value = value }
     end
 
     def lock(locks = true)
       case locks
       when String, TrueClass, NilClass
-        clone.tap { |r| r.lock_value = locks || true }
+        clone.tap {|r| r.lock_value = locks || true }
       else
-        clone.tap { |r| r.lock_value = false }
+        clone.tap {|r| r.lock_value = false }
       end
     end
 
     def readonly(value = true)
-      clone.tap { |r| r.readonly_value = value }
+      clone.tap {|r| r.readonly_value = value }
     end
 
     def create_with(value = true)
-      clone.tap { |r| r.create_with_value = value }
+      clone.tap {|r| r.create_with_value = value }
     end
 
     def from(value = true)
-      clone.tap { |r| r.from_value = value }
+      clone.tap {|r| r.from_value = value }
     end
 
     def extending(*modules, &block)
       modules << Module.new(&block) if block_given?
-      clone.tap { |r| r.send(:apply_modules, *modules) }
+      clone.tap {|r| r.send(:apply_modules, *modules) }
     end
 
     def reverse_order
@@ -230,7 +230,7 @@ def build_select(arel, selects)
         @implicit_readonly = false
         # TODO: fix this ugly hack, we should refactor the callers to get an ARel compatible array.
         # Before this change we were passing to ARel the last element only, and ARel is capable of handling an array
-        if selects.all? { |s| s.is_a?(String) || !s.is_a?(Arel::Expression) } && !(selects.last =~ /^COUNT\(/)
+        if selects.all? {|s| s.is_a?(String) || !s.is_a?(Arel::Expression) } && !(selects.last =~ /^COUNT\(/)
           arel.project(*selects)
         else
           arel.project(selects.last)
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index a4cf5120e14bce6d7d3bc9b6f04543d2fc6bd909..87f46d2992899a9d934f3625a229152feb5fbb1b 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -63,9 +63,7 @@ def test_set_attributes
 
   def test_set_attributes_without_hash
     topic = Topic.new
-    assert_nothing_raised do
-      topic.attributes = ''
-    end
+    assert_nothing_raised { topic.attributes = '' }
   end
 
   def test_integers_as_nil