diff --git a/.kokoro/presubmit/unit_langchain_py38.cfg b/.kokoro/presubmit/unit_langchain_py38.cfg
deleted file mode 100644
index ecfef00cdc..0000000000
--- a/.kokoro/presubmit/unit_langchain_py38.cfg
+++ /dev/null
@@ -1,13 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Run unit tests for LangChain on Python 3.8
-env_vars: {
-    key: "NOX_SESSION"
-    value: "unit_langchain-3.8"
-}
-
-# Run unit tests in parallel, splitting up by file
-env_vars: {
-    key: "PYTEST_ADDOPTS"
-    value: "-n=auto --dist=loadscope"
-}
diff --git a/noxfile.py b/noxfile.py
index 48ca9b0e30..282461dc21 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -52,6 +52,7 @@
 )
 
 UNIT_TEST_PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12"]
+UNIT_TEST_LANGCHAIN_PYTHON_VERSIONS = ["3.9", "3.10", "3.11", "3.12"]
 UNIT_TEST_STANDARD_DEPENDENCIES = [
     "mock",
     "asyncmock",
@@ -275,7 +276,7 @@ def unit_ray(session, ray):
     )
 
 
-@nox.session(python=UNIT_TEST_PYTHON_VERSIONS)
+@nox.session(python=UNIT_TEST_LANGCHAIN_PYTHON_VERSIONS)
 def unit_langchain(session):
     # Install all test dependencies, then install this package in-place.