diff --git a/tests/test_google_utils.py b/tests/test_google_utils.py
new file mode 100644
index 000000000..b8ffa5a7e
--- /dev/null
+++ b/tests/test_google_utils.py
@@ -0,0 +1,60 @@
+import importlib.util
+import sys
+import unittest
+from unittest.mock import MagicMock
+
+# Mock Pipecat package
+sys.modules["pipecat"] = MagicMock()
+sys.modules["pipecat"].__version__ = "0.0.0-test"
+
+# Load the module directly from source
+spec = importlib.util.spec_from_file_location(
+    "pipecat.services.google.utils", "src/pipecat/services/google/utils.py"
+)
+utils_module = importlib.util.module_from_spec(spec)
+sys.modules["pipecat.services.google.utils"] = utils_module
+spec.loader.exec_module(utils_module)
+
+update_google_client_http_options = utils_module.update_google_client_http_options
+pipecat_version = "0.0.0-test"
+
+
+class TestGoogleUtils(unittest.TestCase):
+    def test_update_google_client_http_options_none(self):
+        options = update_google_client_http_options(None)
+        self.assertEqual(options, {"headers": {"x-goog-api-client": f"pipecat/{pipecat_version}"}})
+
+    def test_update_google_client_http_options_dict_empty(self):
+        options = update_google_client_http_options({})
+        self.assertEqual(options, {"headers": {"x-goog-api-client": f"pipecat/{pipecat_version}"}})
+
+    def test_update_google_client_http_options_dict_existing_headers(self):
+        initial_options = {"headers": {"Authorization": "Bearer token"}}
+        options = update_google_client_http_options(initial_options)
+        self.assertEqual(options["headers"]["Authorization"], "Bearer token")
+        self.assertEqual(options["headers"]["x-goog-api-client"], f"pipecat/{pipecat_version}")
+
+    def test_update_google_client_http_options_object(self):
+        class HttpOptions:
+            def __init__(self):
+                self.headers = None
+
+        http_options = HttpOptions()
+        updated_options = update_google_client_http_options(http_options)
+        self.assertEqual(
+            updated_options.headers, {"x-goog-api-client": f"pipecat/{pipecat_version}"}
+        )
+
+    def test_update_google_client_http_options_object_existing_headers(self):
+        class HttpOptions:
+            def __init__(self):
+                self.headers = {"Authorization": "Bearer token"}
+
+        http_options = HttpOptions()
+        updated_options = update_google_client_http_options(http_options)
+        self.assertEqual(updated_options.headers["Authorization"], "Bearer token")
+        self.assertEqual(updated_options.headers["x-goog-api-client"], f"pipecat/{pipecat_version}")
+
+
+if __name__ == "__main__":
+    unittest.main()