diff --git a/features/fixtures/delayed_job/app/config/initializers/bugsnag.rb b/features/fixtures/delayed_job/app/config/initializers/bugsnag.rb
index da2c39de9..fda4c546b 100644
--- a/features/fixtures/delayed_job/app/config/initializers/bugsnag.rb
+++ b/features/fixtures/delayed_job/app/config/initializers/bugsnag.rb
@@ -8,7 +8,6 @@
   config.project_root = ENV["BUGSNAG_PROJECT_ROOT"] if ENV.include? "BUGSNAG_PROJECT_ROOT"
   config.ignore_classes << lambda { |ex| ex.class.to_s == ENV["BUGSNAG_IGNORE_CLASS"] } if ENV.include? "BUGSNAG_IGNORE_CLASS"
   config.auto_capture_sessions = ENV["BUGSNAG_AUTO_CAPTURE_SESSIONS"] == "true"
-  config.release_stage = ENV["BUGSNAG_RELEASE_STAGE"] if ENV.include? "BUGSNAG_RELEASE_STAGE"
   config.send_code = ENV["BUGSNAG_SEND_CODE"] != "false"
   config.send_environment = ENV["BUGSNAG_SEND_ENVIRONMENT"] == "true"
 end
diff --git a/features/fixtures/plain/app/app.rb b/features/fixtures/plain/app/app.rb
index dc66f28f7..37524117e 100644
--- a/features/fixtures/plain/app/app.rb
+++ b/features/fixtures/plain/app/app.rb
@@ -22,7 +22,6 @@ def configure_using_environment
     conf.proxy_password = ENV["BUGSNAG_PROXY_PASSWORD"] if ENV.include? "BUGSNAG_PROXY_PASSWORD"
     conf.proxy_port = ENV["BUGSNAG_PROXY_PORT"] if ENV.include? "BUGSNAG_PROXY_PORT"
     conf.proxy_user = ENV["BUGSNAG_PROXY_USER"] if ENV.include? "BUGSNAG_PROXY_USER"
-    conf.release_stage = ENV["BUGSNAG_RELEASE_STAGE"] if ENV.include? "BUGSNAG_RELEASE_STAGE"
     conf.send_environment = ENV["BUGSNAG_SEND_ENVIRONMENT"] != "false"
     conf.send_code = ENV["BUGSNAG_SEND_CODE"] != "false"
     conf.timeout = ENV["BUGSNAG_TIMEOUT"] if ENV.include? "BUGSNAG_TIMEOUT"
@@ -35,4 +34,4 @@ def add_at_exit
       Bugsnag.notify($!, true)
     end
   end
-end
\ No newline at end of file
+end
diff --git a/features/fixtures/rails3/app/config/initializers/bugsnag.rb b/features/fixtures/rails3/app/config/initializers/bugsnag.rb
index 8a1ac08ea..baa9c5d3f 100644
--- a/features/fixtures/rails3/app/config/initializers/bugsnag.rb
+++ b/features/fixtures/rails3/app/config/initializers/bugsnag.rb
@@ -8,7 +8,6 @@
   config.project_root = ENV["BUGSNAG_PROJECT_ROOT"] if ENV.include? "BUGSNAG_PROJECT_ROOT"
   config.ignore_classes << lambda { |ex| ex.class.to_s == ENV["BUGSNAG_IGNORE_CLASS"] } if ENV.include? "BUGSNAG_IGNORE_CLASS"
   config.auto_capture_sessions = ENV["BUGSNAG_AUTO_CAPTURE_SESSIONS"] == "true" unless ENV["USE_DEFAULT_AUTO_CAPTURE_SESSIONS"] == "true"
-  config.release_stage = ENV["BUGSNAG_RELEASE_STAGE"] if ENV.include? "BUGSNAG_RELEASE_STAGE"
   config.send_code = ENV["BUGSNAG_SEND_CODE"] != "false"
   config.send_environment = ENV["BUGSNAG_SEND_ENVIRONMENT"] == "true"
   config.meta_data_filters << 'filtered_parameter'
diff --git a/features/fixtures/rails4/app/config/initializers/bugsnag.rb b/features/fixtures/rails4/app/config/initializers/bugsnag.rb
index 8a1ac08ea..baa9c5d3f 100644
--- a/features/fixtures/rails4/app/config/initializers/bugsnag.rb
+++ b/features/fixtures/rails4/app/config/initializers/bugsnag.rb
@@ -8,7 +8,6 @@
   config.project_root = ENV["BUGSNAG_PROJECT_ROOT"] if ENV.include? "BUGSNAG_PROJECT_ROOT"
   config.ignore_classes << lambda { |ex| ex.class.to_s == ENV["BUGSNAG_IGNORE_CLASS"] } if ENV.include? "BUGSNAG_IGNORE_CLASS"
   config.auto_capture_sessions = ENV["BUGSNAG_AUTO_CAPTURE_SESSIONS"] == "true" unless ENV["USE_DEFAULT_AUTO_CAPTURE_SESSIONS"] == "true"
-  config.release_stage = ENV["BUGSNAG_RELEASE_STAGE"] if ENV.include? "BUGSNAG_RELEASE_STAGE"
   config.send_code = ENV["BUGSNAG_SEND_CODE"] != "false"
   config.send_environment = ENV["BUGSNAG_SEND_ENVIRONMENT"] == "true"
   config.meta_data_filters << 'filtered_parameter'
diff --git a/features/fixtures/rails5/app/config/initializers/bugsnag.rb b/features/fixtures/rails5/app/config/initializers/bugsnag.rb
index 8a1ac08ea..baa9c5d3f 100644
--- a/features/fixtures/rails5/app/config/initializers/bugsnag.rb
+++ b/features/fixtures/rails5/app/config/initializers/bugsnag.rb
@@ -8,7 +8,6 @@
   config.project_root = ENV["BUGSNAG_PROJECT_ROOT"] if ENV.include? "BUGSNAG_PROJECT_ROOT"
   config.ignore_classes << lambda { |ex| ex.class.to_s == ENV["BUGSNAG_IGNORE_CLASS"] } if ENV.include? "BUGSNAG_IGNORE_CLASS"
   config.auto_capture_sessions = ENV["BUGSNAG_AUTO_CAPTURE_SESSIONS"] == "true" unless ENV["USE_DEFAULT_AUTO_CAPTURE_SESSIONS"] == "true"
-  config.release_stage = ENV["BUGSNAG_RELEASE_STAGE"] if ENV.include? "BUGSNAG_RELEASE_STAGE"
   config.send_code = ENV["BUGSNAG_SEND_CODE"] != "false"
   config.send_environment = ENV["BUGSNAG_SEND_ENVIRONMENT"] == "true"
   config.meta_data_filters << 'filtered_parameter'
diff --git a/features/fixtures/rails6/app/config/initializers/bugsnag.rb b/features/fixtures/rails6/app/config/initializers/bugsnag.rb
index 8a1ac08ea..baa9c5d3f 100644
--- a/features/fixtures/rails6/app/config/initializers/bugsnag.rb
+++ b/features/fixtures/rails6/app/config/initializers/bugsnag.rb
@@ -8,7 +8,6 @@
   config.project_root = ENV["BUGSNAG_PROJECT_ROOT"] if ENV.include? "BUGSNAG_PROJECT_ROOT"
   config.ignore_classes << lambda { |ex| ex.class.to_s == ENV["BUGSNAG_IGNORE_CLASS"] } if ENV.include? "BUGSNAG_IGNORE_CLASS"
   config.auto_capture_sessions = ENV["BUGSNAG_AUTO_CAPTURE_SESSIONS"] == "true" unless ENV["USE_DEFAULT_AUTO_CAPTURE_SESSIONS"] == "true"
-  config.release_stage = ENV["BUGSNAG_RELEASE_STAGE"] if ENV.include? "BUGSNAG_RELEASE_STAGE"
   config.send_code = ENV["BUGSNAG_SEND_CODE"] != "false"
   config.send_environment = ENV["BUGSNAG_SEND_ENVIRONMENT"] == "true"
   config.meta_data_filters << 'filtered_parameter'