diff --git a/test/test_codecov.rb b/test/test_codecov.rb
index 472b28d..a661f4c 100644
--- a/test/test_codecov.rb
+++ b/test/test_codecov.rb
@@ -111,6 +111,9 @@ def teardown
     ENV['GIT_BRANCH'] = nil
     ENV['GIT_COMMIT'] = nil
     ENV['GITLAB_CI'] = nil
+    ENV['HEROKU_TEST_RUN_ID'] = nil
+    ENV['HEROKU_TEST_RUN_BRANCH'] = nil
+    ENV['HEROKU_TEST_RUN_COMMIT_VERSION'] = nil
     ENV['JENKINS_URL'] = nil
     ENV['MAGNUM'] = nil
     ENV['PULL_REQUEST'] = nil
@@ -394,6 +397,19 @@ def test_azure_pipelines
     assert_equal("owner/repo", result['params'][:slug])
     assert_equal('f881216b-b5c0-4eb1-8f21-b51887d1d506', result['params']['token'])
   end
+  def test_heroku
+    ENV['HEROKU_TEST_RUN_ID'] = "454f5dc9-afa4-433f-bb28-84678a00fd98"
+    ENV['HEROKU_TEST_RUN_BRANCH'] = "master"
+    ENV['HEROKU_TEST_RUN_COMMIT_VERSION'] = "743b04806ea677403aa2ff26c6bdeb85005de658"
+    ENV['CODECOV_TOKEN'] = 'f881216b-b5c0-4eb1-8f21-b51887d1d506'
+
+    result = upload
+    assert_equal("heroku", result['params'][:service])
+    assert_equal("743b04806ea677403aa2ff26c6bdeb85005de658", result['params'][:commit])
+    assert_equal("454f5dc9-afa4-433f-bb28-84678a00fd98", result['params'][:build])
+    assert_equal("master", result['params'][:branch])
+    assert_equal('f881216b-b5c0-4eb1-8f21-b51887d1d506', result['params']['token'])
+  end
 
   def test_filenames_are_shortened_correctly
     formatter = SimpleCov::Formatter::Codecov.new