diff --git a/test/test_protocol.py b/test/test_protocol.py
index 4c711c1..9d7d59d 100644
--- a/test/test_protocol.py
+++ b/test/test_protocol.py
@@ -148,7 +148,7 @@ class Ei:
 
         cb = EiCallback.create(next(self.object_ids), VERSION_V(1))
         self.context.register(cb)
-        self.send(self.connection.Sync(cb.object_id, VERSION_V(1)))
+        self.send(self.connection.Sync(cb.object_id, cb.version))
 
         return self.wait_for(
             lambda: cb not in self.find_objects_by_interface(InterfaceName.EI_CALLBACK)
@@ -715,7 +715,7 @@ class TestEiProtocol:
         cb = EiCallback.create(next(ei.object_ids), VERSION_V(1))
         ei.context.register(cb)
         assert ei.connection is not None
-        ei.send(ei.connection.Sync(cb.object_id, VERSION_V(1)))
+        ei.send(ei.connection.Sync(cb.object_id, cb.version))
         ei.dispatch()
 
         assert cb.calllog[0].name == "Done"
@@ -759,7 +759,7 @@ class TestEiProtocol:
         # Send the invalid object request
         ei.send(release)
 
-        ei.send(ei.connection.Sync(cb.object_id, VERSION_V(1)))
+        ei.send(ei.connection.Sync(cb.object_id, cb.version))
         ei.wait_for(lambda: have_sync)
 
         assert have_invalid_object_event, "Expected invalid_object event, got none"
@@ -923,20 +923,20 @@ class TestEiProtocol:
             # and some of the next few ids might have been used by pingpongs
             cb = EiCallback.create(0xFF00000000000100, VERSION_V(1))
             ei.context.register(cb)
-            ei.send(ei.connection.Sync(cb.object_id, VERSION_V(1)))
+            ei.send(ei.connection.Sync(cb.object_id, cb.version))
         elif test_for == "repeat-id":
             cb = EiCallback.create(0x100, VERSION_V(1))
             ei.context.register(cb)
-            ei.send(ei.connection.Sync(cb.object_id, VERSION_V(1)))
+            ei.send(ei.connection.Sync(cb.object_id, cb.version))
             cb = EiCallback.create(0x100, VERSION_V(1))
-            ei.send(ei.connection.Sync(cb.object_id, VERSION_V(1)))
+            ei.send(ei.connection.Sync(cb.object_id, cb.version))
         elif test_for == "decreasing-id":
             cb = EiCallback.create(0x101, VERSION_V(1))
             ei.context.register(cb)
-            ei.send(ei.connection.Sync(cb.object_id, VERSION_V(1)))
+            ei.send(ei.connection.Sync(cb.object_id, cb.version))
             cb = EiCallback.create(0x100, VERSION_V(1))
             ei.context.register(cb)
-            ei.send(ei.connection.Sync(cb.object_id, VERSION_V(1)))
+            ei.send(ei.connection.Sync(cb.object_id, cb.version))
         else:
             assert False, "Unhandled test parameter"