diff --git a/gui_agents/s1/aci/LinuxOSACI.py b/gui_agents/s1/aci/LinuxOSACI.py
index 74deaad5..09a67f3e 100644
--- a/gui_agents/s1/aci/LinuxOSACI.py
+++ b/gui_agents/s1/aci/LinuxOSACI.py
@@ -537,6 +537,8 @@ def hotkey(self, keys: List):
         Args:
             keys:List the keys to press in combination in a list format (e.g. ['ctrl', 'c'])
         """
+        if isinstance(keys, str):
+            keys = [keys]
         # add quotes around the keys
         keys = [f"'{key}'" for key in keys]
         return f"import pyautogui; pyautogui.hotkey({', '.join(keys)})"
@@ -548,6 +550,10 @@ def hold_and_press(self, hold_keys: List, press_keys: List):
             hold_keys:List, list of keys to hold
             press_keys:List, list of keys to press in a sequence
         """
+        if isinstance(hold_keys, str):
+            hold_keys = [hold_keys]
+        if isinstance(press_keys, str):
+            press_keys = [press_keys]
 
         press_keys_str = "[" + ", ".join([f"'{key}'" for key in press_keys]) + "]"
         command = "import pyautogui; "
diff --git a/gui_agents/s1/aci/MacOSACI.py b/gui_agents/s1/aci/MacOSACI.py
index 09e70f74..d6a7423b 100644
--- a/gui_agents/s1/aci/MacOSACI.py
+++ b/gui_agents/s1/aci/MacOSACI.py
@@ -421,6 +421,8 @@ def hotkey(self, keys: List):
         Args:
             keys:List the keys to press in combination in a list format (e.g. ['shift', 'c'])
         """
+        if isinstance(keys, str):
+            keys = [keys]
         # Normalize any 'cmd' to 'command'
         keys = [_normalize_key(k) for k in keys]
         # add quotes around the keys
@@ -434,6 +436,10 @@ def hold_and_press(self, hold_keys: List, press_keys: List):
             hold_keys:List, list of keys to hold
             press_keys:List, list of keys to press in a sequence
         """
+        if isinstance(hold_keys, str):
+            hold_keys = [hold_keys]
+        if isinstance(press_keys, str):
+            press_keys = [press_keys]
         # Normalize any 'cmd' to 'command' in both lists
         hold_keys = [_normalize_key(k) for k in hold_keys]
         press_keys = [_normalize_key(k) for k in press_keys]
diff --git a/gui_agents/s1/aci/WindowsOSACI.py b/gui_agents/s1/aci/WindowsOSACI.py
index 24b56629..3fbbbc07 100644
--- a/gui_agents/s1/aci/WindowsOSACI.py
+++ b/gui_agents/s1/aci/WindowsOSACI.py
@@ -405,6 +405,8 @@ def hotkey(self, keys: List[str]):
         Args:
             keys:List[str] the keys to press in combination in a list format (e.g. ['shift', 'c'])
         """
+        if isinstance(keys, str):
+            keys = [keys]
         keys = [_normalize_key(k) for k in keys]
         keys = [f"'{key}'" for key in keys]
         command = f"import pyautogui; pyautogui.hotkey({', '.join(keys)}, interval=0.5)"
@@ -417,6 +419,10 @@ def hold_and_press(self, hold_keys: List[str], press_keys: List[str]):
             hold_keys:List[str], list of keys to hold
             press_keys:List[str], list of keys to press in a sequence
         """
+        if isinstance(hold_keys, str):
+            hold_keys = [hold_keys]
+        if isinstance(press_keys, str):
+            press_keys = [press_keys]
         hold_keys = [_normalize_key(k) for k in hold_keys]
         press_keys = [_normalize_key(k) for k in press_keys]
 
diff --git a/tests/test_aci_hotkey.py b/tests/test_aci_hotkey.py
new file mode 100644
index 00000000..aed0557d
--- /dev/null
+++ b/tests/test_aci_hotkey.py
@@ -0,0 +1,27 @@
+import pytest
+from gui_agents.s1.aci.WindowsOSACI import WindowsACI
+from gui_agents.s1.aci.MacOSACI import MacOSACI
+
+
+def test_windows_hotkey_single_string():
+    aci = WindowsACI()
+    command = aci.hotkey("enter")
+    assert "pyautogui.hotkey('enter', interval=0.5)" in command
+
+
+def test_windows_hotkey_list():
+    aci = WindowsACI()
+    command = aci.hotkey(["alt", "tab"])
+    assert "pyautogui.hotkey('alt', 'tab', interval=0.5)" in command
+
+
+def test_macos_hotkey_single_string():
+    aci = MacOSACI()
+    command = aci.hotkey("enter")
+    assert "pyautogui.hotkey('enter', interval=1)" in command
+
+
+def test_macos_hotkey_list():
+    aci = MacOSACI()
+    command = aci.hotkey(["cmd", "c"])
+    assert "pyautogui.hotkey('command', 'c', interval=1)" in command