diff --git a/test/unit/array_core_ext_test.rb b/test/unit/array_core_ext_test.rb
new file mode 100644
index 0000000..035dea6
--- /dev/null
+++ b/test/unit/array_core_ext_test.rb
@@ -0,0 +1,11 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+# tests for Array core extension. See lib/noosfero/core_ext/array.rb
+class StringCoreExtTest < ActiveSupport::TestCase
+
+  should 'allow uniq by a block' do
+    array = [0,1,2,3,4,5,6]
+    assert_equal [0,1], array.uniq_by {|number| number%2 }
+  end
+
+end
--
libgit2 0.21.2