diff --git a/google/generativeai/generative_models.py b/google/generativeai/generative_models.py
index 50b15261a..ee6a81b69 100644
--- a/google/generativeai/generative_models.py
+++ b/google/generativeai/generative_models.py
@@ -4,12 +4,9 @@
 
 from collections.abc import Iterable
 import textwrap
-from typing import Any, Union, overload
+from typing import overload
 import reprlib
 
-# pylint: disable=bad-continuation, line-too-long
-
-
 import google.api_core.exceptions
 from google.generativeai import protos
 from google.generativeai import client
@@ -509,6 +506,52 @@ def __init__(
         self._last_received: generation_types.BaseGenerateContentResponse | None = None
         self.enable_automatic_function_calling = enable_automatic_function_calling
 
+    def count_tokens(
+        self,
+        content: content_types.ContentType | None = None,
+        *,
+        tools: content_types.FunctionLibraryType | None = None,
+        tool_config: content_types.ToolConfigType | None = None,
+        request_options: helper_types.RequestOptionsType | None = None,
+    ):
+        history = self.history[:]
+
+        if content is not None:
+            content = content_types.to_content(content)
+            if not content.role:
+                content.role = self._USER_ROLE
+            history.append(content)
+
+        return self.model.count_tokens(
+            contents=history,
+            tools=tools,
+            tool_config=tool_config,
+            request_options=request_options,
+        )
+
+    async def count_tokens_async(
+        self,
+        content: content_types.ContentType | None = None,
+        *,
+        tools: content_types.FunctionLibraryType | None = None,
+        tool_config: content_types.ToolConfigType | None = None,
+        request_options: helper_types.RequestOptionsType | None = None,
+    ):
+        history = self.history[:]
+
+        if content is not None:
+            content = content_types.to_content(content)
+            if not content.role:
+                content.role = self._USER_ROLE
+            history.append(content)
+
+        return await self.model.count_tokens(
+            contents=history,
+            tools=tools,
+            tool_config=tool_config,
+            request_options=request_options,
+        )
+
     def send_message(
         self,
         content: content_types.ContentType,
diff --git a/tests/test_async_code_match.py b/tests/test_async_code_match.py
index 0ec4550d4..2e45a9973 100644
--- a/tests/test_async_code_match.py
+++ b/tests/test_async_code_match.py
@@ -62,7 +62,7 @@ def _inspect_decorator_exemption(self, node, fpath) -> bool:
 
         return False
 
-    def _execute_code_match(self, source, asource):
+    def _execute_code_match(self, source, asource, fpath):
         asource = (
             asource.replace("anext", "next")
             .replace("aiter", "iter")
@@ -73,7 +73,7 @@ def _execute_code_match(self, source, asource):
             .replace("ASYNC_", "")
         )
         asource = re.sub(" *?# type: ignore", "", asource)
-        self.assertEqual(source, asource)
+        self.assertEqual(source, asource, f"Matching {fpath}")
 
     def test_code_match_for_async_methods(self):
         for fpath in (pathlib.Path(__file__).parent.parent / "google").rglob("*.py"):
@@ -101,7 +101,7 @@ def test_code_match_for_async_methods(self):
                         )
                         func_source = self._maybe_trim_docstring(snode)
                         func_asource = self._maybe_trim_docstring(anode)
-                        self._execute_code_match(func_source, func_asource)
+                        self._execute_code_match(func_source, func_asource, fpath)
                         # print(f"Matched {node.name}")
                     else:
                         code_match_funcs[node.name] = node