diff --git a/backend/packages/harness/pyproject.toml b/backend/packages/harness/pyproject.toml
index 47cd1afa..fdb4c0e4 100644
--- a/backend/packages/harness/pyproject.toml
+++ b/backend/packages/harness/pyproject.toml
@@ -46,6 +46,10 @@ postgres = [
     "psycopg[binary]>=3.3.3",
     "psycopg-pool>=3.3.0",
 ]
+postgres-test = [
+    "deerflow-harness[postgres]",
+    "testcontainers[postgres]>=4.0",
+]
 pymupdf = ["pymupdf4llm>=0.0.17"]
 
 [build-system]
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 1b74a77c..a904e6e5 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -25,6 +25,7 @@ dependencies = [
 
 [project.optional-dependencies]
 postgres = ["deerflow-harness[postgres]"]
+postgres-test = ["deerflow-harness[postgres-test]"]
 
 [dependency-groups]
 dev = [
diff --git a/backend/uv.lock b/backend/uv.lock
index 378bbb84..db0a983c 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -766,6 +766,9 @@ dependencies = [
 postgres = [
     { name = "deerflow-harness", extra = ["postgres"] },
 ]
+postgres-test = [
+    { name = "deerflow-harness", extra = ["postgres-test"] },
+]
 
 [package.dev-dependencies]
 dev = [
@@ -780,6 +783,7 @@ requires-dist = [
     { name = "bcrypt", specifier = ">=4.0.0" },
     { name = "deerflow-harness", editable = "packages/harness" },
     { name = "deerflow-harness", extras = ["postgres"], marker = "extra == 'postgres'", editable = "packages/harness" },
+    { name = "deerflow-harness", extras = ["postgres-test"], marker = "extra == 'postgres-test'", editable = "packages/harness" },
     { name = "dingtalk-stream", specifier = ">=0.24.3" },
     { name = "email-validator", specifier = ">=2.0.0" },
     { name = "fastapi", specifier = ">=0.115.0" },
@@ -795,7 +799,7 @@ requires-dist = [
     { name = "uvicorn", extras = ["standard"], specifier = ">=0.34.0" },
     { name = "wecom-aibot-python-sdk", specifier = ">=0.1.6" },
 ]
-provides-extras = ["postgres"]
+provides-extras = ["postgres", "postgres-test"]
 
 [package.metadata.requires-dev]
 dev = [
@@ -854,6 +858,13 @@ postgres = [
     { name = "psycopg", extra = ["binary"] },
     { name = "psycopg-pool" },
 ]
+postgres-test = [
+    { name = "asyncpg" },
+    { name = "langgraph-checkpoint-postgres" },
+    { name = "psycopg", extra = ["binary"] },
+    { name = "psycopg-pool" },
+    { name = "testcontainers" },
+]
 pymupdf = [
     { name = "pymupdf4llm" },
 ]
@@ -866,6 +877,7 @@ requires-dist = [
     { name = "alembic", specifier = ">=1.13" },
     { name = "asyncpg", marker = "extra == 'postgres'", specifier = ">=0.29" },
     { name = "ddgs", specifier = ">=9.10.0" },
+    { name = "deerflow-harness", extras = ["postgres"], marker = "extra == 'postgres-test'", editable = "packages/harness" },
     { name = "dotenv", specifier = ">=0.9.9" },
     { name = "duckdb", specifier = ">=1.4.4" },
     { name = "exa-py", specifier = ">=1.0.0" },
@@ -897,9 +909,10 @@ requires-dist = [
     { name = "readabilipy", specifier = ">=0.3.0" },
     { name = "sqlalchemy", extras = ["asyncio"], specifier = ">=2.0,<3.0" },
     { name = "tavily-python", specifier = ">=0.7.17" },
+    { name = "testcontainers", extras = ["postgres"], marker = "extra == 'postgres-test'", specifier = ">=4.0" },
     { name = "tiktoken", specifier = ">=0.8.0" },
 ]
-provides-extras = ["ollama", "postgres", "pymupdf"]
+provides-extras = ["ollama", "postgres", "postgres-test", "pymupdf"]
 
 [[package]]
 name = "defusedxml"
@@ -941,6 +954,20 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/ba/5a/18ad964b0086c6e62e2e7500f7edc89e3faa45033c71c1893d34eed2b2de/dnspython-2.8.0-py3-none-any.whl", hash = "sha256:01d9bbc4a2d76bf0db7c1f729812ded6d912bd318d3b1cf81d30c0f845dbf3af", size = 331094, upload-time = "2025-09-07T18:57:58.071Z" },
 ]
 
+[[package]]
+name = "docker"
+version = "7.1.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "pywin32", marker = "sys_platform == 'win32'" },
+    { name = "requests" },
+    { name = "urllib3" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/91/9b/4a2ea29aeba62471211598dac5d96825bb49348fa07e906ea930394a83ce/docker-7.1.0.tar.gz", hash = "sha256:ad8c70e6e3f8926cb8a92619b832b4ea5299e2831c14284663184e200546fa6c", size = 117834, upload-time = "2024-05-23T11:13:57.216Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/e3/26/57c6fb270950d476074c087527a558ccb6f4436657314bfb6cdf484114c4/docker-7.1.0-py3-none-any.whl", hash = "sha256:c96b93b7f0a746f9e77d325bcfb87422a3d8bd4f03136ae8a85b37f1898d5fc0", size = 147774, upload-time = "2024-05-23T11:13:55.01Z" },
+]
+
 [[package]]
 name = "docstring-parser"
 version = "0.18.0"
@@ -4124,6 +4151,22 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/d7/c1/eb8f9debc45d3b7918a32ab756658a0904732f75e555402972246b0b8e71/tenacity-9.1.4-py3-none-any.whl", hash = "sha256:6095a360c919085f28c6527de529e76a06ad89b23659fa881ae0649b867a9d55", size = 28926, upload-time = "2026-02-07T10:45:32.24Z" },
 ]
 
+[[package]]
+name = "testcontainers"
+version = "4.14.2"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "docker" },
+    { name = "python-dotenv" },
+    { name = "typing-extensions" },
+    { name = "urllib3" },
+    { name = "wrapt" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/ca/ac/a597c3a0e02b26cbed6dd07df68be1e57684766fd1c381dee9b170a99690/testcontainers-4.14.2.tar.gz", hash = "sha256:1340ccf16fe3acd9389a6c9e1d9ab21d9fe99a8afdf8165f89c3e69c1967d239", size = 166841, upload-time = "2026-03-18T05:19:16.696Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/13/2d/26b8b30067d94339afee62c3edc9b803a6eb9332f521ba77d8aaab5de873/testcontainers-4.14.2-py3-none-any.whl", hash = "sha256:0d0522c3cd8f8d9627cda41f7a6b51b639fa57bdc492923c045117933c668d68", size = 125712, upload-time = "2026-03-18T05:19:15.29Z" },
+]
+
 [[package]]
 name = "tiktoken"
 version = "0.12.0"