diff --git a/.travis.yml b/.travis.yml
index 83b51a1..c8f0fb3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,20 +10,29 @@ cache:
    directories:
        - $HOME/.composer/cache
 
-php:
-    - 7.1
-    - 7.2
-
 matrix:
     fast_finish: true
-    allow_failures:
+    include:
+        - php: 7.1
+          env: 'IMAGEMAGICK_SOURCE="ImageMagick-6.9.9-33"'
+        - php: 7.1
+          env: 'IMAGEMAGICK_SOURCE="ImageMagick-7.0.7-21"'
+        - php: 7.2
+          env: 'IMAGEMAGICK_SOURCE="ImageMagick-6.9.9-33"'
         - php: 7.2
+          env: 'IMAGEMAGICK_SOURCE="ImageMagick-7.0.7-21"'
 
 before_install:
     - composer self-update
+    - curl https://www.imagemagick.org/download/$IMAGEMAGICK_SOURCE.tar.gz | tar xz
+    - cd $IMAGEMAGICK_SOURCE
+    - ./configure
+    - make
+    - sudo make install
 
 install:
-    - composer install
+    - cd ..
+    - composer install --no-interaction
     - composer require --dev satooshi/php-coveralls:~0.6
 
 script: