1 files changed, 6 insertions, 0 deletions
diff --git a/test/csv/test_interface.rb b/test/csv/test_interface.rb
index 89b4a462f9..d6bf470f6b 100755
--- a/test/csv/test_interface.rb
+++ b/test/csv/test_interface.rb
@@ -130,6 +130,12 @@ class TestCSV::Interface < TestCSV
     end
   end
 
+  def test_nil_is_not_acceptable
+    assert_raise_with_message ArgumentError, "Cannot parse nil as CSV" do
+      CSV.new(nil)
+    end
+  end
+
   ### Test Write Interface ###
 
   def test_generate