diff --git a/README.md b/README.md
index d7e176a8..19040728 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ Up-to-date documentation at: https://easypost.com/docs
 
 ```bash
 # Run tests
-bundle exec rspec
+API_KEY=123... bundle exec rspec
 ```
 
 ## Releasing
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 63a480de..90d2366b 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -5,7 +5,7 @@
 
 RSpec.configure do |config|
   config.before(:each) do
-    EasyPost.api_key = 'BmvaWhg8mP26QXWdTplYWA'
+    EasyPost.api_key = ENV['API_KEY']
   end
 
   config.around(:each) do |example|