diff --git a/tests/test_chain.py b/tests/test_chain.py
index 1c2bc95..3e83654 100644
--- a/tests/test_chain.py
+++ b/tests/test_chain.py
@@ -7,6 +7,13 @@ from tests.base import TestBase
 
 class TestChain(TestBase):
 
+    def test_chain_spec_str(self):
+        s = ChainSpec('foo', 'bar', 3, 'baz')
+        self.assertEqual('foo:bar:3:baz', str(s))
+
+        s = ChainSpec('foo', 'bar', 3)
+        self.assertEqual('foo:bar:3', str(s))
+
     def test_chain_spec(self):
 
         s = ChainSpec.from_chain_str('foo:bar:3')
@@ -18,5 +25,18 @@ class TestChain(TestBase):
             s = ChainSpec.from_chain_str('foo')
 
 
+    def test_chain_spec_dict(self):
+        s = 'foo:bar:3:baz'
+        c = ChainSpec.from_chain_str('foo:bar:3:baz')
+        d = c.asdict()
+        self.assertEqual(d['arch'], 'foo')
+        self.assertEqual(d['fork'], 'bar')
+        self.assertEqual(d['network_id'], 3)
+        self.assertEqual(d['common_name'], 'baz')
+        cc = ChainSpec.from_dict(d)
+        self.assertEqual(s, str(cc))
+
+
+
 if __name__ == '__main__':
     unittest.main()