diff --git a/.github/workflows/_test.yml b/.github/workflows/_test.yml
index 83a5d9837..3a4f0d4d2 100644
--- a/.github/workflows/_test.yml
+++ b/.github/workflows/_test.yml
@@ -33,6 +33,11 @@ jobs:
           poetry-version: ${{ env.POETRY_VERSION }}
           working-directory: ${{ inputs.working-directory }}
           cache-key: test-${{ inputs.working-directory }}
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_RO_TOKEN }}
 
       - name: Install dependencies
         shell: bash
diff --git a/.github/workflows/_test_langgraph.yml b/.github/workflows/_test_langgraph.yml
index 3f6c7c2b8..2aad17993 100644
--- a/.github/workflows/_test_langgraph.yml
+++ b/.github/workflows/_test_langgraph.yml
@@ -18,8 +18,10 @@ jobs:
           - "3.12"
           - "3.13"
         core-version:
-          - ">=0.2.39,<0.3.0"
           - "latest"
+        include:
+          - python-version: "3.11"
+            core-version: ">=0.2.39,<0.3.0"
 
     defaults:
       run:
@@ -33,6 +35,11 @@ jobs:
           python-version: ${{ matrix.python-version }}
           poetry-version: ${{ env.POETRY_VERSION }}
           cache-key: test-langgraph
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_RO_TOKEN }}
 
       - name: Install dependencies
         shell: bash
diff --git a/.github/workflows/_test_scheduler_kafka.yml b/.github/workflows/_test_scheduler_kafka.yml
index 8bfdfb18c..da01a9bd8 100644
--- a/.github/workflows/_test_scheduler_kafka.yml
+++ b/.github/workflows/_test_scheduler_kafka.yml
@@ -27,6 +27,11 @@ jobs:
           python-version: ${{ matrix.python-version }}
           poetry-version: ${{ env.POETRY_VERSION }}
           cache-key: test-scheduler-kafka
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_RO_TOKEN }}
 
       - name: Install dependencies
         shell: bash
diff --git a/examples/tutorials/tool-calling-agent-local.ipynb b/examples/tutorials/tool-calling-agent-local.ipynb
deleted file mode 100644
index 71bb26be7..000000000
--- a/examples/tutorials/tool-calling-agent-local.ipynb
+++ /dev/null
@@ -1,33 +0,0 @@
-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "id": "8a63cfe9",
-   "metadata": {},
-   "source": [
-    "This file has been moved to https://github.com/langchain-ai/langgraph/blob/main/docs/docs/tutorials/tutorials/tool-calling-agent-local.ipynb"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
-   "language": "python",
-   "name": "python3"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 3
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.11.8"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 5
-}
diff --git a/libs/langgraph/langgraph/pregel/__init__.py b/libs/langgraph/langgraph/pregel/__init__.py
index 2109d4b39..01d53feab 100644
--- a/libs/langgraph/langgraph/pregel/__init__.py
+++ b/libs/langgraph/langgraph/pregel/__init__.py
@@ -252,8 +252,8 @@ class Pregel(Runnable[Union[dict[str, Any], Any], Union[dict[str, Any], Any]]):
         if auto_validate:
             self.validate()
 
-    def copy(self, update: dict[str, Any]) -> Self:
-        attrs = {**self.__dict__, **update}
+    def copy(self, update: dict[str, Any] | None = None) -> Self:
+        attrs = {**self.__dict__, **(update or {})}
         return self.__class__(**attrs)
 
     def with_config(self, config: RunnableConfig | None = None, **kwargs: Any) -> Self:
diff --git a/libs/langgraph/langgraph/pregel/remote.py b/libs/langgraph/langgraph/pregel/remote.py
index f96060a5a..54db4ad60 100644
--- a/libs/langgraph/langgraph/pregel/remote.py
+++ b/libs/langgraph/langgraph/pregel/remote.py
@@ -154,6 +154,8 @@ class RemoteGraph(PregelProtocol, Runnable):
                     interrupts=tuple(interrupts),
                     state=self._create_state_snapshot(task["state"])
                     if task["state"]
+                    else {"configurable": task["checkpoint"]}
+                    if task["checkpoint"]
                     else None,
                     result=task.get("result"),
                 )