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-rw-r--r--test/rubygems/test_gem.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/test/rubygems/test_gem.rb b/test/rubygems/test_gem.rb
index 27f10e49b4..41b127ce39 100644
--- a/test/rubygems/test_gem.rb
+++ b/test/rubygems/test_gem.rb
@@ -280,7 +280,9 @@ class TestGem < RubyGemTestCase
def test_self_prefix
file_name = File.expand_path __FILE__
- assert_equal File.dirname(File.dirname(file_name)), Gem.prefix
+ expected = File.dirname File.dirname(file_name)
+ expected = File.dirname expected if expected =~ %r|/test| # for Ruby trunk
+ assert_equal expected, Gem.prefix
end
def test_self_required_location