diff --git a/delayed_job.gemspec b/delayed_job.gemspec
index 32c5f445d..a45f6564e 100644
--- a/delayed_job.gemspec
+++ b/delayed_job.gemspec
@@ -3,13 +3,12 @@ Gem::Specification.new do |spec|
   spec.authors        = ['Brandon Keepers', 'Brian Ryckbost', 'Chris Gaffney', 'David Genord II', 'Erik Michaels-Ober', 'Matt Griffin', 'Steve Richert', 'Tobias Lütke']
   spec.description    = 'Delayed_job (or DJ) encapsulates the common pattern of asynchronously executing longer tasks in the background. It is a direct extraction from Shopify where the job table is responsible for a multitude of core tasks.'
   spec.email          = ['brian@collectiveidea.com']
-  spec.files          = %w[CHANGELOG.md CONTRIBUTING.md LICENSE.md README.md Rakefile delayed_job.gemspec]
-  spec.files         += Dir.glob('{contrib,lib,recipes,spec}/**/*')
+  spec.files          = %w[CHANGELOG.md CONTRIBUTING.md LICENSE.md README.md delayed_job.gemspec]
+  spec.files         += Dir['{contrib,lib,recipes}/**/*']
   spec.homepage       = 'http://github.com/collectiveidea/delayed_job'
   spec.licenses       = ['MIT']
   spec.name           = 'delayed_job'
   spec.require_paths  = ['lib']
   spec.summary        = 'Database-backed asynchronous priority queue system -- Extracted from Shopify'
-  spec.test_files     = Dir.glob('spec/**/*')
   spec.version        = '4.0.4'
 end