diff --git a/botocore/regions.py b/botocore/regions.py
index 569830ae0d..d3b2705727 100644
--- a/botocore/regions.py
+++ b/botocore/regions.py
@@ -615,7 +615,7 @@ def _resolve_param_as_operation_context_param(
         operation_ctx_params = operation_model.operation_context_parameters
         if param_name in operation_ctx_params:
             path = operation_ctx_params[param_name]['path']
-            return tuple(jmespath.search(path, call_args))
+            return jmespath.search(path, call_args)
 
     def _resolve_param_as_builtin(self, builtin_name, builtins):
         if builtin_name not in EndpointResolverBuiltins.__members__.values():
diff --git a/botocore/utils.py b/botocore/utils.py
index fe704ff274..2d55e8a8dc 100644
--- a/botocore/utils.py
+++ b/botocore/utils.py
@@ -1491,6 +1491,9 @@ def func_with_weakref(weakref_to_self, *args, **kwargs):
 
         @functools.wraps(func)
         def inner(self, *args, **kwargs):
+            for kwarg_key, kwarg_value in kwargs.items():
+                if isinstance(kwarg_value, list):
+                    kwargs[kwarg_key] = tuple(kwarg_value)
             return func_with_weakref(weakref.ref(self), *args, **kwargs)
 
         inner.cache_info = func_with_weakref.cache_info
diff --git a/tests/unit/test_endpoint_provider.py b/tests/unit/test_endpoint_provider.py
index 83752f43de..3d6bf81e32 100644
--- a/tests/unit/test_endpoint_provider.py
+++ b/tests/unit/test_endpoint_provider.py
@@ -162,9 +162,6 @@ def ruleset_testcases():
 
         for test in tests["testCases"]:
             input_params = test["params"]
-            for key, value in input_params.items():
-                if isinstance(value, list):
-                    input_params[key] = tuple(value)
             expected_object = test["expect"]
             if "error" in expected_object:
                 error_cases.append(