diff --git a/.travis.yml b/.travis.yml
index 23bd128..42cb05d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,13 +2,13 @@ env:
   - TRAVIS="yes"
 
 before_install:
-  - '[ $TEST_PEP8 -ne 1 ] && curl https://ftp-master.debian.org/keys/archive-key-7.0.asc | sudo apt-key add -'
-  - '[ $TEST_PEP8 -ne 1 ] && echo "deb http://http.debian.net/debian wheezy-backports main" | sudo tee -a /etc/apt/sources.list'
-  - '[ $TEST_PEP8 -ne 1 ] && echo "deb http://http.debian.net/debian wheezy main" | sudo tee -a /etc/apt/sources.list'
-  - '[ $TEST_PEP8 -ne 1 ] && sudo /sbin/ifconfig'
-  - '[ $TEST_PEP8 -ne 1 ] && sudo apt-get update -qq'
-  - '[ $TEST_PEP8 -ne 1 ] && sudo rm /etc/dpkg/dpkg.cfg.d/multiarch'
-  - '[ $TEST_PEP8 -ne 1 ] && sudo ./tests/test_env/deploy.sh'
+  - '[ "$TEST_PEP8" == "1" ] && curl https://ftp-master.debian.org/keys/archive-key-7.0.asc | sudo apt-key add -'
+  - '[ "$TEST_PEP8" == "1" ] && echo "deb http://http.debian.net/debian wheezy-backports main" | sudo tee -a /etc/apt/sources.list'
+  - '[ "$TEST_PEP8" == "1" ] && echo "deb http://http.debian.net/debian wheezy main" | sudo tee -a /etc/apt/sources.list'
+  - '[ "$TEST_PEP8" == "1" ] && sudo /sbin/ifconfig'
+  - '[ "$TEST_PEP8" == "1" ] && sudo apt-get update -qq'
+  - '[ "$TEST_PEP8" == "1" ] && sudo rm /etc/dpkg/dpkg.cfg.d/multiarch'
+  - '[ "$TEST_PEP8" == "1" ] && sudo ./tests/test_env/deploy.sh'
 
 language: python
 python: