1 files changed, 6 insertions, 0 deletions
diff --git a/test/ruby/test_env.rb b/test/ruby/test_env.rb
index c1617cce7e..9fe85fb190 100644
--- a/test/ruby/test_env.rb
+++ b/test/ruby/test_env.rb
@@ -188,6 +188,10 @@ class TestEnv < Test::Unit::TestCase
     ENV.each_pair {|k, v| h2[k] = v }
     assert_equal(h1, h2)
 
+    assert_nil(ENV.reject! {|k, v| IGNORE_CASE ? k.upcase == "TEST" : k == "test" })
+  end
+
+  def test_delete_if
     h1 = {}
     ENV.each_pair {|k, v| h1[k] = v }
     ENV["test"] = "foo"
@@ -195,6 +199,8 @@ class TestEnv < Test::Unit::TestCase
     h2 = {}
     ENV.each_pair {|k, v| h2[k] = v }
     assert_equal(h1, h2)
+
+    assert_equal(ENV, ENV.delete_if {|k, v| IGNORE_CASE ? k.upcase == "TEST" : k == "test" })
   end
 
   def test_select_bang