diff --git a/app/jobs/backtrace_job.rb b/app/jobs/backtrace_job.rb
index 50ee155..eab9f22 100644
--- a/app/jobs/backtrace_job.rb
+++ b/app/jobs/backtrace_job.rb
@@ -30,13 +30,15 @@ class BacktraceJob < ApplicationJob
 
           # Encuentra el código fuente del error
           source = data.dig('sourcesContent', data['sources']&.index(backtrace['file']))&.split("\n")
-          backtrace['function'] = source[backtrace['line'] - 1] if source.present?
+          # XXX: Elimina la sangría aunque cambie las columnas porque
+          # eso lo vamos a ver en el archivo fuente directo.
+          backtrace['function'] = source[backtrace['line'] - 1].strip if source.present?
         end
       end
     end
 
     begin
-      raise BacktraceException, "#{origin}: #{params['errors']&.first&.dig('message')}"
+      raise BacktraceException, "#{origin}: #{message}"
     rescue BacktraceException => e
       ExceptionNotifier.notify_exception(e, data: { site: site.name, params: params, _backtrace: true })
     end
@@ -102,4 +104,9 @@ class BacktraceJob < ApplicationJob
   rescue URI::Error
     params.dig('context', 'url')
   end
+
+  # @return [String,Nil]
+  def message
+    @message ||= params['errors']&.first&.dig('message')
+  end
 end
diff --git a/app/views/exception_notifier/_data.text.erb b/app/views/exception_notifier/_data.text.erb
index 3493d68..09313f4 100644
--- a/app/views/exception_notifier/_data.text.erb
+++ b/app/views/exception_notifier/_data.text.erb
@@ -3,7 +3,7 @@
 # <%= error['type'] %>: <%= error['message'] %>
 
 ```
-<%= Terminal::Table.new headings: error['backtrace'].first.keys, rows: error['backtrace'].map(&:values).map(&:strip) %>
+<%= Terminal::Table.new headings: error['backtrace'].first.keys, rows: error['backtrace'].map(&:values) %>
 ```
 
 <% end %>
diff --git a/config/environments/test.rb b/config/environments/test.rb
index f816982..c58a65c 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -64,4 +64,13 @@ Rails.application.configure do
 
   # Annotate rendered view with file names.
   # config.action_view.annotate_rendered_view_with_filenames = true
+
+  config.middleware.use ExceptionNotification::Rack,
+                        error_grouping: true,
+                        email: {
+                          email_prefix: '',
+                          sender_address: ENV.fetch('DEFAULT_FROM', "noreply@sutty.nl"),
+                          exception_recipients: ENV.fetch('EXCEPTION_TO', "errors@sutty.nl"),
+                          normalize_subject: true
+                        }
 end
diff --git a/test/jobs/backtrace_job_test.rb b/test/jobs/backtrace_job_test.rb
new file mode 100644
index 0000000..89c6860
--- /dev/null
+++ b/test/jobs/backtrace_job_test.rb
@@ -0,0 +1,147 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class DeployJobTest < ActiveSupport::TestCase
+  def site
+    @site ||= create :site
+  end
+
+  # Mockup
+  def job
+    job = BacktraceJob.new
+    job.instance_variable_set :@site, site
+    job.instance_variable_set :@params, notice
+
+    job
+  end
+
+  # setTimeout(() => { throw('Prueba') }, 1000)
+  def notice
+    @notice ||= {
+      "errors" => [
+        {
+          "type" => "",
+          "message" => "Prueba",
+          "backtrace" => [
+            {
+              "function" => "pt</e.prototype.notify",
+              "file" => "https://tintalimon.com.ar/assets/js/pack.js",
+              "line" => 89,
+              "column" => 74094
+            },
+            {
+              "function" => "pt</e.prototype.onerror",
+              "file" => "https://tintalimon.com.ar/assets/js/pack.js",
+              "line" => 89,
+              "column" => 74731
+            },
+            {
+              "function" => "pt</e.prototype._instrument/window.onerror",
+              "file" => "https://tintalimon.com.ar/assets/js/pack.js",
+              "line" => 89,
+              "column" => 71925
+            },
+            {
+              "function" => "setTimeout handler*",
+              "file" => "debugger eval code",
+              "line" => 1,
+              "column" => 11
+            }
+          ]
+        }
+      ],
+      "context" => {
+        "severity" => "error",
+        "history" => [
+          {
+            "type" => "error",
+            "target" => "html. > head. > script.[type=\"text/javascript\"][src=\"//stats.habitapp.org/piwik.js\"]",
+            "date" => "2021-04-26T22:06:58.390Z"
+          },
+          {
+            "type" => "DOMContentLoaded",
+            "target" => "[object HTMLDocument]",
+            "date" => "2021-04-26T22:06:58.510Z"
+          },
+          {
+            "type" => "load",
+            "target" => "[object HTMLDocument]",
+            "date" => "2021-04-26T22:06:58.845Z"
+          },
+          {
+            "type" => "xhr",
+            "date" => "2021-04-26T22:06:58.343Z",
+            "method" => "GET",
+            "url" => "assets/data/site.json",
+            "statusCode" => 200,
+            "duration" => 506
+          },
+          {
+            "type" => "xhr",
+            "date" => "2021-04-26T22:06:58.886Z",
+            "method" => "GET",
+            "url" => "assets/templates/cart.html",
+            "statusCode" => 200,
+            "duration" => 591
+          }
+        ],
+        "windowError" => true,
+        "notifier" => {
+          "name" => "airbrake-js/browser",
+          "version" => "1.4.2",
+          "url" => "https://github.com/airbrake/airbrake-js/tree/master/packages/browser"
+        },
+        "userAgent" => "Mozilla/5.0 (Windows NT 6.1; rv:85.0) Gecko/20100101 Firefox/85.0",
+        "url" => "https://tintalimon.com.ar/carrito/",
+        "rootDirectory" => "https://tintalimon.com.ar",
+        "language" => "JavaScript"
+      },
+      "params" => {},
+      "environment" => {},
+      "session" => {}
+    }
+
+    # XXX: Siempre devolvemos un duplicado porque BacktraceJob lo
+    # modifica
+    @notice.dup
+  end
+
+  # Asegurarse que el sitio se destruye al terminar de usarlo
+  teardown do
+    site&.destroy
+  end
+
+  test 'al recibir un backtrace enviamos un error' do
+    ActionMailer::Base.deliveries.clear
+
+    assert BacktraceJob.perform_now site_id: site.id, params: notice
+
+    email = ActionMailer::Base.deliveries.first
+
+    assert email
+    assert_equal " (BacktraceJob::BacktraceException) \"tintalimon.com.ar: Prueba\"", email.subject
+    assert (%r{webpack://} =~ email.body.to_s)
+  end
+
+  test 'los errores se basan en un sitio' do
+    assert_equal site, job.send(:site)
+  end
+
+  test 'los errores tienen archivos fuente' do
+    assert_equal %w[https://tintalimon.com.ar/assets/js/pack.js], job.send(:sources)
+  end
+
+  test 'los errores tienen una url de origen' do
+    assert_equal 'tintalimon.com.ar', job.send(:origin)
+  end
+
+  test 'los errores tienen un sourcemap' do
+    local_job = job
+    sourcemap = local_job.send :sourcemap
+
+    assert_equal SourceMap::Map, sourcemap.class
+    assert_equal 'assets/js/pack.js', sourcemap.filename
+    assert sourcemap.sources.size.positive?
+  end
+end