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-rw-r--r--spec/bundler/spec_helper.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/spec/bundler/spec_helper.rb b/spec/bundler/spec_helper.rb
index 87bdf8b9f3..d750218452 100644
--- a/spec/bundler/spec_helper.rb
+++ b/spec/bundler/spec_helper.rb
@@ -19,6 +19,10 @@ ENV["VISUAL"] = nil
ENV["BUNDLER_EDITOR"] = nil
require "bundler"
+# If we use shared GEM_HOME and install multiple versions, it may cause
+# unexpected test failures.
+gem "diff-lcs"
+
require "rspec/core"
require "rspec/expectations"
require "rspec/mocks"