diff --git a/.travis.yml b/.travis.yml
index f8a37b9..6a73e2f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,10 +9,11 @@ before_install:
   - pip3 install -r ./ci/requirements_dev.txt
 install:
   - pip3 install -r requirements.txt
-before_script:
+after_install:
   - bash ./ci/check_code.sh
+before_script:
+  - nohup python3 ./ci/ci_test_prepare.py &
 script:
-  - python3 ./ci/ci_test_prepare.py &
   - python3 ./ci/ci_test.py
 after_script:
-  - bash ./ci/ci_commit.shs
+  - bash ./ci/ci_commit.sh
diff --git a/ci/ci_commit.sh b/ci/ci_commit.sh
old mode 100644
new mode 100755
diff --git a/ci/ci_test.py b/ci/ci_test.py
old mode 100644
new mode 100755
index 9f5e00c..866771c
--- a/ci/ci_test.py
+++ b/ci/ci_test.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import os
 import sys
 import glob
diff --git a/ci/ci_test_prepare.py b/ci/ci_test_prepare.py
old mode 100644
new mode 100755
index f634f4f..b7158c7
--- a/ci/ci_test_prepare.py
+++ b/ci/ci_test_prepare.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import os
 import sys
 import glob