diff --git a/pyflow/nodes.py b/pyflow/nodes.py
index 67b5a46..380ef97 100644
--- a/pyflow/nodes.py
+++ b/pyflow/nodes.py
@@ -940,8 +940,7 @@ def _add_exit_hook(self, hook):
         if isinstance(hook, str):
             hook = [hook]
         for hk in hook:
-            if hk not in self._exit_hook:
-                self._exit_hook.append(hk)
+            self._exit_hook.append(hk)
         # Check if properly initialised
         if "_nodes" in self.__dict__:
             for chld in self.executable_children:
@@ -1206,8 +1205,7 @@ def _add_exit_hook(self, hook):
         if isinstance(hook, str):
             hook = [hook]
         for hk in hook:
-            if hk not in self._exit_hook:
-                self._exit_hook.append(hk)
+            self._exit_hook.append(hk)
         # Check if properly initialised
         if "_nodes" in self.__dict__:
             for chld in self.executable_children:
@@ -1405,8 +1403,7 @@ def _add_exit_hook(self, hook: str):
         if isinstance(hook, str):
             hook = [hook]
         for hk in hook:
-            if hk not in self._exit_hook:
-                self._exit_hook.append(hk)
+            self._exit_hook.append(hk)
 
     def generate_script(self):
         """