diff --git a/.travis.yml b/.travis.yml
index 228f9f4..71a0e4a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,9 +13,9 @@ env:
     - FORMAT_VERSION="v1"
   matrix:
     # Run once per Dockerfile-<PHP_VERSION>
-    #- PHP_VERSION="5.5" EZ_VERSION="~1.6.0"
-    #- PHP_VERSION="5.6"
-    #- PHP_VERSION="7.0"
+    - PHP_VERSION="5.5" EZ_VERSION="~1.6.0"
+    - PHP_VERSION="5.6"
+    - PHP_VERSION="7.0"
     - PHP_VERSION="7.1"
 
 before_script:
@@ -41,4 +41,4 @@ notifications:
 
 # reduce depth (history) of git checkout
 git:
-  depth: 30
\ No newline at end of file
+  depth: 30