diff --git a/.travis.yml b/.travis.yml
index d596a0f..7c0cd26 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ install:
 before_script:
   - bash ./ci/check_code.sh
 script:
-  - nohup python3 ./ci/ci_test_prepare.py &
+  - python3 ./ci/ci_test_prepare.py > /dev/null
   - python3 ./ci/ci_test.py
 after_script:
   - bash ./ci/ci_commit.shs