diff --git a/stubs/hnswlib/@tests/stubtest_allowlist.txt b/stubs/hnswlib/@tests/stubtest_allowlist.txt
index c8b95d1e576d..993627b1a950 100644
--- a/stubs/hnswlib/@tests/stubtest_allowlist.txt
+++ b/stubs/hnswlib/@tests/stubtest_allowlist.txt
@@ -1,3 +1,2 @@
-# The metaclass of Index is pybind11_builtins.pybind11_type. Since pybind11 is not a
-# runtime dependency of hnswlib, we exclude Index from stubtest checks.
-hnswlib.Index
+# The metaclass of Index is nondeterministically reported as pybind11_builtins.pybind11_type.
+(hnswlib.Index)?