diff --git a/obsstudio_sdk/callback.py b/obsstudio_sdk/callback.py
index 8cc4a61..a106c3a 100644
--- a/obsstudio_sdk/callback.py
+++ b/obsstudio_sdk/callback.py
@@ -42,13 +42,17 @@ class Callback:
             if fns not in self._callbacks:
                 self._callbacks.append(fns)
 
-    def deregister(self, callback):
+    def deregister(self, fns: Union[Iterable, Callable]):
         """deregisters a callback from _callbacks"""
 
         try:
-            self._callbacks.remove(callback)
-        except ValueError:
-            print(f"Failed to remove: {callback}")
+            iterator = iter(fns)
+            for fn in iterator:
+                if fn in self._callbacks:
+                    self._callbacks.remove(fn)
+        except TypeError as e:
+            if fns in self._callbacks:
+                self._callbacks.remove(fns)
 
     def clear(self):
         """clears the _callbacks list"""
diff --git a/obsstudio_sdk/events.py b/obsstudio_sdk/events.py
index 9379891..8d62ab4 100644
--- a/obsstudio_sdk/events.py
+++ b/obsstudio_sdk/events.py
@@ -41,8 +41,9 @@ class EventClient(object):
         self.base_client = ObsClient(**kwargs)
         self.base_client.authenticate()
         self.callback = Callback()
+        self.subscribe()
 
-        self.running = True
+    def subscribe(self):
         worker = Thread(target=self.trigger, daemon=True)
         worker.start()
 
@@ -52,6 +53,7 @@ class EventClient(object):
 
         Triggers a callback on event received.
         """
+        self.running = True
         while self.running:
             self.data = json.loads(self.base_client.ws.recv())
             event, data = (self.data["d"].get("eventType"), self.data["d"])
diff --git a/tests/test_callback.py b/tests/test_callback.py
new file mode 100644
index 0000000..45d9329
--- /dev/null
+++ b/tests/test_callback.py
@@ -0,0 +1,59 @@
+import pytest
+from obsstudio_sdk.callback import Callback
+
+
+class TestCallbacks:
+    __test__ = True
+
+    @classmethod
+    def setup_class(cls):
+        cls.callback = Callback()
+
+    @pytest.fixture(autouse=True)
+    def wraps_tests(self):
+        yield
+        self.callback.clear()
+
+    def test_register_callback(self):
+        def on_callback_method():
+            pass
+
+        self.callback.register(on_callback_method)
+        assert self.callback.get() == ["CallbackMethod"]
+
+    def test_register_callbacks(self):
+        def on_callback_method_one():
+            pass
+
+        def on_callback_method_two():
+            pass
+
+        self.callback.register((on_callback_method_one, on_callback_method_two))
+        assert self.callback.get() == ["CallbackMethodOne", "CallbackMethodTwo"]
+
+    def test_deregister_callback(self):
+        def on_callback_method_one():
+            pass
+
+        def on_callback_method_two():
+            pass
+
+        self.callback.register((on_callback_method_one, on_callback_method_two))
+        self.callback.deregister(on_callback_method_one)
+        assert self.callback.get() == ["CallbackMethodTwo"]
+
+    def test_deregister_callbacks(self):
+        def on_callback_method_one():
+            pass
+
+        def on_callback_method_two():
+            pass
+
+        def on_callback_method_three():
+            pass
+
+        self.callback.register(
+            (on_callback_method_one, on_callback_method_two, on_callback_method_three)
+        )
+        self.callback.deregister((on_callback_method_two, on_callback_method_three))
+        assert self.callback.get() == ["CallbackMethodOne"]
diff --git a/tests/test_request.py b/tests/test_request.py
index d68feb9..70efc3e 100644
--- a/tests/test_request.py
+++ b/tests/test_request.py
@@ -1,5 +1,3 @@
-import time
-
 import pytest
 
 from tests import req_cl