diff --git a/features/support/env.rb b/features/support/env.rb
index 241c6b1b0..a0948aee4 100644
--- a/features/support/env.rb
+++ b/features/support/env.rb
@@ -1,6 +1,6 @@
 PROJECT_ROOT = File.expand_path(File.join(File.dirname(__FILE__), "..", ".."))
 
-require "simplecov"
+require "simplecov" if RUBY_ENGINE == "ruby"
 
 $: << File.join(PROJECT_ROOT, "lib")
 
diff --git a/spec/factory_bot/find_definitions_spec.rb b/spec/factory_bot/find_definitions_spec.rb
index cb7208d78..17fc3c249 100644
--- a/spec/factory_bot/find_definitions_spec.rb
+++ b/spec/factory_bot/find_definitions_spec.rb
@@ -1,3 +1,5 @@
+require "fileutils"
+
 shared_examples_for "finds definitions" do
   before do
     allow(FactoryBot).to receive(:load)
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index c97be814b..b46985956 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,7 +1,7 @@
 require "rspec"
 require "rspec/its"
 
-require "simplecov"
+require "simplecov" if RUBY_ENGINE == "ruby"
 
 require "factory_bot"