diff --git a/.travis.yml b/.travis.yml
index cf0cca113471ec81f9428346f16fde28bcfee31a..6c69b1121e5c02faa8d975486c1bf58722e91e96 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -42,10 +42,13 @@ addons:
 before_install:
   - |
     if [ ${JOB} == "BUILD_AND_TEST" ]; then
-      if ! git diff --name-only $TRAVIS_COMMIT_RANGE | grep -qvE '(\.md$)|(\.rst$)|(\.jpg$)|(\.png$)'
-      then
-        echo "Only markdown docs were updated, stopping build process."
-        exit
+      local change_list=`git diff --name-only $TRAVIS_COMMIT_RANGE`
+      if [ $? -eq 0 ]; then  # if git diff return no zero, then rerun unit test.
+        if ! echo ${change_list} | grep -qvE '(\.md$)|(\.rst$)|(\.jpg$)|(\.png$)'
+        then
+          echo "Only markdown docs were updated, stopping build process."
+          exit
+        fi
       fi
     fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo paddle/scripts/travis/before_install.linux.sh; fi
diff --git a/paddle/scripts/travis/docs.sh b/paddle/scripts/travis/docs.sh
index c2a4809d75b97a9d8d8b83cf197e90bd62b48603..0bbb76a8a3caa27da0911af0fe87df7fbff617b4 100755
--- a/paddle/scripts/travis/docs.sh
+++ b/paddle/scripts/travis/docs.sh
@@ -47,17 +47,20 @@ if [ $? -eq 0 ]; then
 fi
 set -e
 
-# Commit
-git add .
-git config user.name "Travis CI"
-git config user.email "paddle-dev@baidu.com"
-git commit -m "Deploy to GitHub Pages: ${SHA}"
-
-# Set ssh private key
-openssl aes-256-cbc -K $SSL_KEY -iv $SSL_IV -in ../../paddle/scripts/travis/deploy_key.enc -out deploy_key -d
-chmod 600 deploy_key
-eval `ssh-agent -s`
-ssh-add deploy_key
-
-# Push
-git push $SSH_REPO $TARGET_BRANCH
+if [ -n $SSL_KEY ]; then  # Only push updated docs for github.com/PaddlePaddle/Paddle.
+  # Commit
+  git add .
+  git config user.name "Travis CI"
+  git config user.email "paddle-dev@baidu.com"
+  git commit -m "Deploy to GitHub Pages: ${SHA}"
+
+  # Set ssh private key
+  openssl aes-256-cbc -K $SSL_KEY -iv $SSL_IV -in ../../paddle/scripts/travis/deploy_key.enc -out deploy_key -d
+  chmod 600 deploy_key
+  eval `ssh-agent -s`
+  ssh-add deploy_key
+
+  # Push
+  git push $SSH_REPO $TARGET_BRANCH
+
+fi