diff --git a/pyproject.toml b/pyproject.toml
index 4ae979a..92885f8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,6 +25,7 @@ dev = [
     "tomlkit>=0.14.0",
     "types-requests>=2.32.4.20260107",
     "pytest-cov>=7.1.0",
+    "testcontainers[postgres]>=4.12",
 ]
 test-optional = [
     "jax[cpu]>=0.5",
diff --git a/uv.lock b/uv.lock
index 2eb73ea..b934a6e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -700,6 +700,7 @@ dev = [
     { name = "pytest-cov" },
     { name = "respx" },
     { name = "ruff" },
+    { name = "testcontainers" },
     { name = "tomlkit" },
     { name = "types-requests" },
 ]
@@ -735,6 +736,7 @@ dev = [
     { name = "pytest-cov", specifier = ">=7.1.0" },
     { name = "respx", specifier = ">=0.22.0" },
     { name = "ruff", specifier = ">=0.15.7" },
+    { name = "testcontainers", extras = ["postgres"], specifier = ">=4.12" },
     { name = "tomlkit", specifier = ">=0.14.0" },
     { name = "types-requests", specifier = ">=2.32.4.20260107" },
 ]