diff --git a/python/tests/unit_tests/test_testing.py b/python/tests/unit_tests/test_testing.py
index 5338e5956..216039150 100644
--- a/python/tests/unit_tests/test_testing.py
+++ b/python/tests/unit_tests/test_testing.py
@@ -1,4 +1,5 @@
-from langsmith._testing import _serde_example_values
+from langsmith._testing import _serde_example_values, _get_id
+import uuid
 
 
 def test__serde_example_values():
@@ -10,3 +11,19 @@ def __init__(self, a, b):
     results = _serde_example_values({"foo": Foo(1, 2)})
     assert "foo" in results
     assert isinstance(results["foo"], str)
+
+
+def test__get_id():
+    class Foo:
+        bar: str = "baz"
+
+        def __init__(self, a: int, b: int):
+            self.a = a
+            self.b = b
+
+    def foo(x: Foo):
+        return x
+
+    suite_id = uuid.UUID("4e32bff6-5762-4906-8d74-ee2bd0f1d234")
+
+    _get_id(foo, {"x": Foo(1, 2)}, suite_id)