diff --git a/.travis.yml b/.travis.yml
index d9a01489b3..0d95bc8373 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -67,6 +67,13 @@ install:
       pip install "absl-py>=0.7.0" \
       && pip install "numpy<2.0,>=1.14.5"
     fi
+  - |
+    # On TF 1.x nightlies, downgrade estimator temporarily.
+    case "${TF_VERSION_ID}" in
+      tf-nightly|tf-nightly==*)
+        pip install tf-estimator-nightly==1.14.0.dev2019091701
+        ;;
+    esac
   # Deps for gfile S3 test.
   - pip install boto3==1.9.86
   - pip install moto==1.3.7