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diff --git a/spec/models/merge_request_diff_file_spec.rb b/spec/models/merge_request_diff_file_spec.rb
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+require 'rails_helper'
+
+describe MergeRequestDiffFile, type: :model do
+ describe '#utf8_diff' do
+ it 'does not raise error when a hash value is in binary' do
+ subject.diff = "\x05\x00\x68\x65\x6c\x6c\x6f"
+
+ expect { subject.utf8_diff }.not_to raise_error
+ end
+ end
+end