2 files changed, 16 insertions, 4 deletions
diff --git a/test/mitmproxy/test_connections.py b/test/mitmproxy/test_connections.py
index 57fdd8c7..67a6552f 100644
--- a/test/mitmproxy/test_connections.py
+++ b/test/mitmproxy/test_connections.py
@@ -78,6 +78,7 @@ class TestClientConnection:
         assert c != 42
         assert hash(c) != hash(c2)
 
+
 class TestServerConnection:
 
     def test_send(self):
diff --git a/test/mitmproxy/types/test_serializable.py b/test/mitmproxy/types/test_serializable.py
index dd4a3778..390d17e1 100644
--- a/test/mitmproxy/types/test_serializable.py
+++ b/test/mitmproxy/types/test_serializable.py
@@ -1,3 +1,5 @@
+import copy
+
 from mitmproxy.types import serializable
 
 
@@ -6,17 +8,17 @@ class SerializableDummy(serializable.Serializable):
         self.i = i
 
     def get_state(self):
-        return self.i
+        return copy.copy(self.i)
 
     def set_state(self, i):
         self.i = i
 
-    def from_state(self, state):
-        return type(self)(state)
+    @classmethod
+    def from_state(cls, state):
+        return cls(state)
 
 
 class TestSerializable:
-
     def test_copy(self):
         a = SerializableDummy(42)
         assert a.i == 42
@@ -26,3 +28,12 @@ class TestSerializable:
         a.set_state(1)
         assert a.i == 1
         assert b.i == 42
+
+    def test_copy_id(self):
+        a = SerializableDummy({
+            "id": "foo",
+            "foo": 42
+        })
+        b = a.copy()
+        assert a.get_state()["id"] != b.get_state()["id"]
+        assert a.get_state()["foo"] == b.get_state()["foo"]