diff --git a/jekyll-rdf.gemspec b/jekyll-rdf.gemspec
index 1ff52cc..f6ce4a4 100644
--- a/jekyll-rdf.gemspec
+++ b/jekyll-rdf.gemspec
@@ -19,7 +19,6 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'jekyll',               '>= 4.2', '>= 4.2.1'
   s.add_development_dependency 'rake',             '~> 13.0', '>= 13.0.6'
   s.add_development_dependency 'rest-client',      '~> 2.0', '>= 2.0.1'
-  s.add_development_dependency 'coveralls',        '~> 0.8'
   s.add_development_dependency 'test-unit',        '~> 3.0'
   s.add_development_dependency 'shoulda-context',  '~> 1.1'
   s.add_development_dependency 'rspec',            '~> 3.0'
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 471ce2a..447ed2e 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -2,13 +2,11 @@
 require 'shoulda-context'
 require 'rspec/expectations'
 require 'simplecov'
-require 'coveralls'
 require 'ResourceHelper'
 require 'RdfTestUtility'
 
 SimpleCov.formatters = SimpleCov::Formatter::MultiFormatter.new([
   SimpleCov::Formatter::HTMLFormatter,
-  Coveralls::SimpleCov::Formatter
 ])
 SimpleCov.start do
   add_filter ["/.vendor", "/vendor", "/test"]