diff --git a/switcher_client/switcher_data.py b/switcher_client/switcher_data.py
index ac9fe4d..12dfa15 100644
--- a/switcher_client/switcher_data.py
+++ b/switcher_client/switcher_data.py
@@ -4,7 +4,7 @@
 from dataclasses import dataclass
 from datetime import datetime
 from abc import ABCMeta
-from typing import Optional, Union
+from typing import Optional
 
 from switcher_client.lib.compat import Self
 from switcher_client.lib.utils import get
@@ -48,7 +48,7 @@ def check_regex(self, input: str) -> Self:
         """ Adds REGEX_VALIDATION input for strategy validation """
         return self.check(StrategiesType.REGEX.value, input)
 
-    def check_payload(self, input: Union[str, dict]) -> Self:
+    def check_payload(self, input: str | dict) -> Self:
         """ Adds PAYLOAD_VALIDATION input for strategy validation """
         if isinstance(input, dict):
             payload_str = json.dumps(input)
diff --git a/tests/test_switcher_stub.py b/tests/test_switcher_stub.py
index 806032c..543098b 100644
--- a/tests/test_switcher_stub.py
+++ b/tests/test_switcher_stub.py
@@ -139,3 +139,18 @@ def isolated_context_result():
 
         assert switcher.reset_inputs().is_on()
         assert isolated_result is False
+
+    def test_switcher_stub_multiple_keys(self):
+        """ Should allow different bypass values for multiple keys """
+
+        # given
+        switcher1 = Client.get_switcher(self.key)
+        switcher2 = Client.get_switcher(self.key + "_2")
+
+        # test
+        Client.assume(self.key).true()
+        Client.assume(self.key + "_2").false()
+        Client.assume(self.key + "_2").true() # override previous false assumption
+
+        assert switcher1.is_on()
+        assert switcher2.is_on()