diff --git a/tests/test_universal_constructed.py b/tests/test_universal_constructed.py
index 92678c5..7140ec7 100644
--- a/tests/test_universal_constructed.py
+++ b/tests/test_universal_constructed.py
@@ -22,7 +22,7 @@ class SequenceTest(univ.Sequence):
 SequenceTest.componentType = namedtype.NamedTypes(
     namedtype.NamedType('first', char.PrintableString()),
     namedtype.OptionalNamedType('optional', char.UTF8String()),
-    namedtype.DefaultedNamedType('default', useful.UTCTime()),
+    namedtype.DefaultedNamedType('default', useful.UTCTime().subtype(value='251231235959Z')),
     namedtype.NamedType('last', char.PrintableString()),
 )
 
@@ -87,3 +87,40 @@ def test_setof_two_elements():
 def test_setof_two_elements_out_order():
     with pytest.raises(PyAsn1Error):
         decoded, _ = _wrapper(b'3106130142130141', SetOfTest())
+
+
+def test_sequence_no_default_or_optional():
+    decoded, _ = _wrapper(b'3006130141130142', SequenceTest())
+
+    assert str(decoded['first']) == 'A'
+    assert str(decoded['default']) == '251231235959Z'
+    assert not decoded['optional'].isValue
+    assert str(decoded['last']) == 'B'
+
+
+def test_sequence_with_default_no_optional():
+    decoded, _ = _wrapper(b'3015130141170D3234303130313030303030305A130142', SequenceTest())
+
+    assert str(decoded['first']) == 'A'
+    assert str(decoded['default']) == '240101000000Z'
+    assert not decoded['optional'].isValue
+    assert str(decoded['last']) == 'B'
+
+
+def test_sequence_with_default_and_optional():
+    decoded, _ = _wrapper(b'30181301410C0161170D3234303130313030303030305A130142', SequenceTest())
+
+    assert str(decoded['first']) == 'A'
+    assert str(decoded['optional']) == 'a'
+    assert str(decoded['default']) == '240101000000Z'
+    assert str(decoded['last']) == 'B'
+
+
+def test_sequence_missing_element():
+    with pytest.raises(PyAsn1Error):
+        decoded, _ = _wrapper(b'30151301410C0161170D3234303130313030303030305A', SequenceTest())
+
+
+def test_encoded_default_value():
+    with pytest.raises(PyAsn1Error):
+        decoded, _ = _wrapper(b'30181301410C0161170D3235313233313233353935395A130142', SequenceTest())