Eliminate mutation of Dependency objects

1 files changed, 4 insertions, 1 deletions

diff --git a/Library/Homebrew/test/test_dependency_expansion.rb b/Library/Homebrew/test/test_dependency_expansion.rb
index 08165b2d1..227a7d37d 100644
--- a/Library/Homebrew/test/test_dependency_expansion.rb
+++ b/Library/Homebrew/test/test_dependency_expansion.rb
@@ -71,7 +71,10 @@ class DependencyExpansionTests < Test::Unit::TestCase
   end
 
   def test_merger_preserves_env_proc
-    env_proc = @foo.env_proc = stub
+    env_proc = stub
+    dep = Dependency.new("foo", [], env_proc)
+    dep.stubs(:to_formula).returns(stub(:deps => []))
+    @deps.replace [dep]
     assert_equal env_proc, Dependency.expand(@f).first.env_proc
   end