diff --git a/test/test_helper.rb b/test/test_helper.rb
index b274968e3..205ad8ad3 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -7,6 +7,8 @@
 require 'pry'
 
 require 'fhir_models'
+require_relative '../lib/fhir_models/r4/bootstrap/definitions'
+
 FHIR.logger.level = Logger::INFO
 
 PRIMITIVE_EXTENSIONS = [