diff --git a/config/Gemfile b/config/Gemfile
index a9851d107..3280b30a2 100644
--- a/config/Gemfile
+++ b/config/Gemfile
@@ -10,6 +10,7 @@ eval_gemfile File.expand_path('../Gemfile', __dir__)
 gemspec
 
 group :test, :development do
+  gem 'dotenv', '3.2.0'
   gem 'minitest', '6.0.6'
   gem 'simplecov', '1.0.0'
   gem 'yard', '0.9.45'
diff --git a/config/test/test_helper.rb b/config/test/test_helper.rb
index ddee64de9..359c281e9 100644
--- a/config/test/test_helper.rb
+++ b/config/test/test_helper.rb
@@ -3,6 +3,9 @@
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
+require 'dotenv'
+Dotenv.load(File.expand_path('.env', __dir__))
+
 require 'simplecov'
 SimpleCov.start