diff --git a/test/controllers/amf_controller_test.rb b/test/controllers/amf_controller_test.rb
index 135b27edf..0fb20fab1 100644
--- a/test/controllers/amf_controller_test.rb
+++ b/test/controllers/amf_controller_test.rb
@@ -1,5 +1,4 @@
 require "test_helper"
-require "stringio"
 
 class AmfControllerTest < ActionController::TestCase
   include Potlatch
diff --git a/test/controllers/traces_controller_test.rb b/test/controllers/traces_controller_test.rb
index cd30746fe..179070e00 100644
--- a/test/controllers/traces_controller_test.rb
+++ b/test/controllers/traces_controller_test.rb
@@ -1,5 +1,4 @@
 require "test_helper"
-require "digest"
 require "minitest/mock"
 
 class TracesControllerTest < ActionController::TestCase
diff --git a/test/models/trace_test.rb b/test/models/trace_test.rb
index 8bae041fc..2ab1a3d5a 100644
--- a/test/models/trace_test.rb
+++ b/test/models/trace_test.rb
@@ -1,5 +1,4 @@
 require "test_helper"
-require "digest"
 require "minitest/mock"
 
 class TraceTest < ActiveSupport::TestCase