diff --git a/frappe/__init__.py b/frappe/__init__.py
index babde0f155..b4623a97e9 100644
--- a/frappe/__init__.py
+++ b/frappe/__init__.py
@@ -620,6 +620,16 @@ xss_safe_methods: set[Callable] = set()
 allowed_http_methods_for_whitelisted_func: dict[Callable, list[str]] = {}
 
 
+def _in_request_or_test():
+	"""
+	Internal
+
+	Used by whitelist to determine whether type hints should be validated or not
+	"""
+
+	return getattr(local, "request", None) or in_test
+
+
 def whitelist(allow_guest=False, xss_safe=False, methods=None):
 	"""
 	Decorator for whitelisting a function and making it accessible via HTTP.
@@ -643,17 +653,8 @@ def whitelist(allow_guest=False, xss_safe=False, methods=None):
 
 		global whitelisted, guest_methods, xss_safe_methods, allowed_http_methods_for_whitelisted_func
 
-		# validate argument types only if request is present
-		in_request_or_test = lambda: getattr(local, "request", None) or in_test  # noqa: E731
-
-		# get function from the unbound / bound method
-		# this is needed because functions can be compared, but not methods
-		method = None
-		if hasattr(fn, "__func__"):
-			method = validate_argument_types(fn, apply_condition=in_request_or_test)
-			fn = method.__func__
-		else:
-			fn = validate_argument_types(fn, apply_condition=in_request_or_test)
+		# validate argument types if request is present or in test context
+		fn = validate_argument_types(fn, apply_condition=_in_request_or_test)
 
 		whitelisted.add(fn)
 		allowed_http_methods_for_whitelisted_func[fn] = methods
@@ -664,7 +665,7 @@ def whitelist(allow_guest=False, xss_safe=False, methods=None):
 			if xss_safe:
 				xss_safe_methods.add(fn)
 
-		return method or fn
+		return fn
 
 	return innerfn