diff --git a/src/test/ruby/test_asn1.rb b/src/test/ruby/test_asn1.rb
index 95f55137..cb697c08 100644
--- a/src/test/ruby/test_asn1.rb
+++ b/src/test/ruby/test_asn1.rb
@@ -21,6 +21,16 @@ def test_encode_integer
     assert_equal i, OpenSSL::ASN1.decode(ai.to_der).value
   end
 
+  def test_encode_asn1_data
+    ai = OpenSSL::ASN1::ASN1Data.new(i = "bla", 0, :APPLICATION)
+    assert_equal i, OpenSSL::ASN1.decode(ai.to_der).value
+
+    ai = OpenSSL::ASN1::ASN1Data.new(i = ["bla"], 0, :APPLICATION)
+    assert_equal i, OpenSSL::ASN1.decode(ai.to_der).value
+
+    assert_raise(TypeError) { OpenSSL::ASN1::ASN1Data.new(1).to_der }
+  end
+
   def test_encode_nil
     #Primitives raise TypeError, Constructives NoMethodError