diff --git a/.travis.yml b/.travis.yml
index 17b47a9..e01ea72 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,17 +25,41 @@ jobs:
     env: TRAVIS_JOB_TYPE=FORMAT
     #ZBX_VERSION must be one of the tags for ubuntu here: https://hub.docker.com/r/zabbix/zabbix-agent/tags/
   - name: Zabbix 3.4 Modbus TCP
-    env: ZBX_VERSION=3.4.12 ZBX_HEADERS_VERSION=3.2 TRAVIS_JOB_TYPE=TEST MODBUS_HOST=172.16.238.2:5020
+    env: < 
+      ZBX_VERSION=3.4.12
+      ZBX_HEADERS_VERSION=3.2
+      TRAVIS_JOB_TYPE=TEST
+      MODBUS_HOST=172.16.238.2:5020
   - name: Zabbix 3.2 Modbus TCP
-    env: ZBX_VERSION=3.2.11 ZBX_HEADERS_VERSION=3.2 TRAVIS_JOB_TYPE=TEST MODBUS_HOST=172.16.238.2:5020
+    env: <
+      ZBX_VERSION=3.2.11
+      ZBX_HEADERS_VERSION=3.2
+      TRAVIS_JOB_TYPE=TEST
+      MODBUS_HOST=172.16.238.2:5020
   - name: Zabbix 3.0 Modbus TCP
-    env: ZBX_VERSION=3.0.19 ZBX_HEADERS_VERSION=3   TRAVIS_JOB_TYPE=TEST MODBUS_HOST=172.16.238.2:5020
+    env: <
+      ZBX_VERSION=3.0.19
+      ZBX_HEADERS_VERSION=3
+      TRAVIS_JOB_TYPE=TEST
+      MODBUS_HOST=172.16.238.2:5020
   - name: Zabbix 3.4 Modbus RTU over TCP
-    env: ZBX_VERSION=3.4.12 ZBX_HEADERS_VERSION=3.2 TRAVIS_JOB_TYPE=TEST MODBUS_HOST=enc://172.16.238.2:5021
+    env: <
+      ZBX_VERSION=3.4.12
+      ZBX_HEADERS_VERSION=3.2
+      TRAVIS_JOB_TYPE=TEST
+      MODBUS_HOST=enc://172.16.238.2:5021
   - name: Zabbix 3.2 Modbus RTU over TCP
-    env: ZBX_VERSION=3.2.11 ZBX_HEADERS_VERSION=3.2 TRAVIS_JOB_TYPE=TEST MODBUS_HOST=enc://172.16.238.2:5021
+    env: <
+      ZBX_VERSION=3.2.11
+      ZBX_HEADERS_VERSION=3.2
+      TRAVIS_JOB_TYPE=TEST
+      MODBUS_HOST=enc://172.16.238.2:5021
   - name: Zabbix 3.0 Modbus RTU over TCP
-    env: ZBX_VERSION=3.0.19 ZBX_HEADERS_VERSION=3   TRAVIS_JOB_TYPE=TEST MODBUS_HOST=enc://172.16.238.2:5021
+    env: <
+      ZBX_VERSION=3.0.19
+      ZBX_HEADERS_VERSION=3
+      TRAVIS_JOB_TYPE=TEST
+      MODBUS_HOST=enc://172.16.238.2:5021
   #-name: Zabbix 2.2
   # env: ZBX_VERSION=2.2.19 ZBX_HEADERS_VERSION=2  
   - stage: deploy