diff --git a/lib/auxiliary_rails/application/error.rb b/lib/auxiliary_rails/application/error.rb
index 50896ae..3e9e43f 100644
--- a/lib/auxiliary_rails/application/error.rb
+++ b/lib/auxiliary_rails/application/error.rb
@@ -3,24 +3,24 @@ module Application
     # @abstract
     class Error < RuntimeError
       attr_accessor :context
-      attr_reader :exception, :severity
+      attr_reader :exc, :severity
 
       class << self
         def i18n_scope
           "errors.#{name.underscore}"
         end
 
-        # @return [self] Wraps exception into a new Application Error object
-        def wrap(exception, context: {}, severity: nil)
-          new(exception.message, context: context, exception: exception, severity: severity)
+        # @return [self] Wraps exception into a new ApplicationError object
+        def wrap(exc, context: {}, severity: nil)
+          new(exc.message, context: context, exc: exc, severity: severity)
         end
       end
 
-      def initialize(message = nil, context: {}, exception: nil, severity: nil)
-        super message
+      def initialize(message = nil, context: {}, exc: nil, severity: nil)
+        super(message)
 
         self.context = default_context.merge(context || {})
-        self.exception = exception
+        self.exc = exc
         self.severity = severity&.to_sym || default_severity
       end
 
@@ -44,7 +44,7 @@ def report
 
       protected
 
-      attr_writer :exception, :severity
+      attr_writer :exc, :severity
     end
   end
 end
diff --git a/lib/auxiliary_rails/concerns/performable.rb b/lib/auxiliary_rails/concerns/performable.rb
index 8f27312..81f0683 100644
--- a/lib/auxiliary_rails/concerns/performable.rb
+++ b/lib/auxiliary_rails/concerns/performable.rb
@@ -73,19 +73,19 @@ def on(status, &block)
       def ensure_empty_errors!
         return if errors.empty?
 
-        error!("`#{self.class}` contains errors.")
+        error!("'#{self.class}' contains errors.")
       end
 
       def ensure_empty_status!
         return if performable_status.nil?
 
-        error!("`#{self.class}` was already executed.")
+        error!("'#{self.class}' was already executed.")
       end
 
       def ensure_execution!
         return if performable_status.present?
 
-        error!("`#{self.class}` was not executed yet.")
+        error!("'#{self.class}' was not executed yet.")
       end
 
       # Sets command's status to <tt>failure</tt>.
diff --git a/spec/sample_commands_spec.rb b/spec/sample_commands_spec.rb
index f8f3792..dadc81d 100644
--- a/spec/sample_commands_spec.rb
+++ b/spec/sample_commands_spec.rb
@@ -29,7 +29,7 @@
     describe '#call' do
       it do
         expect { cmd.call }.to raise_error AuxiliaryRails::Application::Error,
-          '`SampleCommands::DoubleStatusSetCommand` was already executed.'
+          "'SampleCommands::DoubleStatusSetCommand' was already executed."
       end
     end
   end
@@ -40,7 +40,7 @@
     describe '#call' do
       it do
         expect { cmd.call }.to raise_error AuxiliaryRails::Application::Error,
-          '`SampleCommands::SuccessWithErrorsCommand` contains errors.'
+          "'SampleCommands::SuccessWithErrorsCommand' contains errors."
       end
     end
   end