diff --git a/tensorflow/tools/ci_build/ctpu/ctpu.sh b/tensorflow/tools/ci_build/ctpu/ctpu.sh
index da04e2d1c90..2d9beeb25e3 100644
--- a/tensorflow/tools/ci_build/ctpu/ctpu.sh
+++ b/tensorflow/tools/ci_build/ctpu/ctpu.sh
@@ -46,7 +46,7 @@ function ctpu_up {
   local name="kokoro-tpu-${RANDOM}"
   local zone="us-central1-c"
   local size="v2-8"
-  local version="nightly-2.x"
+  local version="nightly"
   local project  # Project automatically detected from environment.
   local gcp_network  # Network needed only if project default is Legacy.