diff --git a/syn/base_utils/tests/test_dict.py b/syn/base_utils/tests/test_dict.py
index <HASH>..<HASH> 100644
--- a/syn/base_utils/tests/test_dict.py
+++ b/syn/base_utils/tests/test_dict.py
@@ -107,7 +107,6 @@ def test_reflexivedict():
 #-------------------------------------------------------------------------------
 # SeqDict
 
-
 def test_seqdict():
     dct = SeqDict(a = [1, 2],
                   b = (10, 11))
@@ -116,9 +115,11 @@ def test_seqdict():
     assert dct.b == (10, 11)
 
     dct.update(dict(a = (3, 4),
-                    b = [12, 13]))
+                    b = [12, 13],
+                    c = [20]))
     assert dct.a == [1, 2, 3, 4]
     assert dct.b == (10, 11, 12, 13)
+    assert dct.c == [20]
 
 #-------------------------------------------------------------------------------
Completing SeqDict test coverage