diff --git a/tests/test_litellm/proxy/db/test_routing_prisma_wrapper.py b/tests/test_litellm/proxy/db/test_routing_prisma_wrapper.py
index 8c3a2b9e2d7..a8a6d252afb 100644
--- a/tests/test_litellm/proxy/db/test_routing_prisma_wrapper.py
+++ b/tests/test_litellm/proxy/db/test_routing_prisma_wrapper.py
@@ -18,6 +18,52 @@ sys.path.insert(0, os.path.abspath("../../../.."))
 # stub the prisma SDK do so per-test via monkeypatch, which is properly scoped.
 
 
+_MANAGED_DB_ENV_VARS = (
+    "IAM_TOKEN_DB_AUTH",
+    "DATABASE_URL",
+    "DATABASE_URL_READ_REPLICA",
+    "DATABASE_HOST",
+    "DATABASE_PORT",
+    "DATABASE_USER",
+    "DATABASE_USERNAME",
+    "DATABASE_NAME",
+    "DATABASE_SCHEMA",
+    "DATABASE_PASSWORD",
+    "DATABASE_HOST_READ_REPLICA",
+    "DATABASE_PORT_READ_REPLICA",
+    "DATABASE_USER_READ_REPLICA",
+    "DATABASE_USERNAME_READ_REPLICA",
+    "DATABASE_NAME_READ_REPLICA",
+    "DATABASE_SCHEMA_READ_REPLICA",
+    "DATABASE_PASSWORD_READ_REPLICA",
+)
+
+
+@pytest.fixture(autouse=True)
+def _scrub_db_env():
+    """Snapshot and restore DB env vars across every test in this module.
+
+    `PrismaWrapper.get_rds_iam_token` (and a few sibling code paths) write
+    `DATABASE_URL` directly into `os.environ`, which `monkeypatch` cannot
+    undo when the variable started out unset. Without this fixture the
+    synthesized writer URL leaks into later tests in the same xdist worker;
+    e.g. `tests/test_litellm/proxy/common_utils/test_key_rotation_e2e.py::
+    TestDeprecatedKeyLookupDbE2E::test_deprecated_key_grace_period_cache_hit_path`
+    stops skipping (`os.getenv("DATABASE_URL")` is now truthy) and tries to
+    open a Prisma connection against the bogus host, failing with
+    `httpx.ConnectError`. Mirrors the fixture in `test_db_url_settings.py`.
+    """
+    saved = {var: os.environ.get(var) for var in _MANAGED_DB_ENV_VARS}
+    try:
+        yield
+    finally:
+        for var, value in saved.items():
+            if value is None:
+                os.environ.pop(var, None)
+            else:
+                os.environ[var] = value
+
+
 def _make_wrappers():
     from litellm.proxy.db.prisma_client import PrismaWrapper