diff --git a/packages/runtime-sdk/src/_workers_sdk_entropy_import_context.py b/packages/runtime-sdk/src/_workers_sdk_entropy_import_context.py
index acece4cd..8b87d750 100644
--- a/packages/runtime-sdk/src/_workers_sdk_entropy_import_context.py
+++ b/packages/runtime-sdk/src/_workers_sdk_entropy_import_context.py
@@ -49,6 +49,7 @@ class STATE:
 @register_create_patch("tiktoken._tiktoken")
 @register_exec_patch("cryptography.exceptions")
 @register_exec_patch("jiter")
+@register_exec_patch("rpds")
 @register_exec_patch("uuid_utils._uuid_utils")
 @contextmanager
 def rust_package_context(module):
diff --git a/packages/runtime-sdk/tests/workerd-test/entropy-patches/pyproject.toml b/packages/runtime-sdk/tests/workerd-test/entropy-patches/pyproject.toml
index 087a4b9d..06640c6a 100644
--- a/packages/runtime-sdk/tests/workerd-test/entropy-patches/pyproject.toml
+++ b/packages/runtime-sdk/tests/workerd-test/entropy-patches/pyproject.toml
@@ -19,6 +19,7 @@ dependencies = [
     # "openai",
     "litestar",
     "opentelemetry-api",
+    "jsonschema",
     "mcp; python_version >= '3.14'",
     "workers-runtime-sdk",
 ]
diff --git a/packages/runtime-sdk/tests/workerd-test/entropy-patches/tests/test_jsonschema.py b/packages/runtime-sdk/tests/workerd-test/entropy-patches/tests/test_jsonschema.py
new file mode 100644
index 00000000..9a858eac
--- /dev/null
+++ b/packages/runtime-sdk/tests/workerd-test/entropy-patches/tests/test_jsonschema.py
@@ -0,0 +1,9 @@
+# ruff: noqa: F401
+# jsonschema -> referencing -> rpds (a Rust extension) seeds a HashMap at import.
+import jsonschema
+import rpds
+
+
+def test_import():
+    # make sure this file is collected by pytest
+    pass
diff --git a/packages/runtime-sdk/tests/workerd-test/entropy-patches/worker.py b/packages/runtime-sdk/tests/workerd-test/entropy-patches/worker.py
index 3b3d41d7..c4fc3c2e 100644
--- a/packages/runtime-sdk/tests/workerd-test/entropy-patches/worker.py
+++ b/packages/runtime-sdk/tests/workerd-test/entropy-patches/worker.py
@@ -2,6 +2,7 @@
 # a snapshot.
 from tests import (  # noqa: F401
     test_aiohttp_websocket,
+    test_jsonschema,
     test_langsmith,
     test_litestar,
     test_mcp,