diff --git a/.travis.yml b/.travis.yml
index 7cae9fa..b548468 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,35 +1,6 @@
 language: ruby
 
-sudo: false
-
-env:
-  global:
-    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
-    - VIPS_VERSION_MAJOR=8
-    - VIPS_VERSION_MINOR=5
-    - VIPS_VERSION_MICRO=7
-    - PATH=$HOME/vips/bin:$PATH
-    - LD_LIBRARY_PATH=$HOME/vips/lib:$LD_LIBRARY_PATH
-    - PKG_CONFIG_PATH=$HOME/vips/lib/pkgconfig:$PKG_CONFIG_PATH
-
-rvm:
-  - "2.0"
-  - "2.1.10"
-  - "2.2.7"
-  - "2.3.4"
-  - "2.4.1"
-  - "jruby-9.0.4.0"
-
-script: rake test
-
-cache:
-  bundler: true
-  directories:
-    - $HOME/vips
-
-before_install:
-  - uname -a
-  - bash install-vips.sh --without-python
+sudo: required
 
 addons:
   apt:
@@ -58,3 +29,38 @@ addons:
         # - libwebpmux2
       - libfftw3-dev
       - libglib2.0-dev
+
+before_install:
+  - wget http://www.imagemagick.org/download/ImageMagick.tar.gz
+  - tar -xvf ImageMagick.tar.gz
+  - cd ImageMagick-7.*
+  - ./configure
+  - make
+  - sudo make install
+  - sudo ldconfig /usr/local/lib
+  - sudo apt-get install -qq graphicsmagick
+  - uname -a
+  - bash install-vips.sh --without-python
+
+env:
+  global:
+    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
+    - VIPS_VERSION_MAJOR=8
+    - VIPS_VERSION_MINOR=5
+    - VIPS_VERSION_MICRO=7
+    - PATH=$HOME/vips/bin:$PATH
+    - LD_LIBRARY_PATH=$HOME/vips/lib:$LD_LIBRARY_PATH
+    - PKG_CONFIG_PATH=$HOME/vips/lib/pkgconfig:$PKG_CONFIG_PATH
+
+cache:
+  bundler: true
+  directories:
+    - $HOME/vips
+
+rvm:
+  - "2.2"
+  - "2.3"
+  - "2.4"
+  - "jruby-9.1.9.0"
+
+script: rake test
diff --git a/README.md b/README.md
index 0080a4b..9bf336e 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ that they can be used in any project. The goal of image_processing is to have a
 centralized place where helper methods for image processing are maintained,
 instead of CarrierWave, Dragonfly and Refile each implementing their own.
 
-It's been tested with MRI 2.x and JRuby.
+It's been tested with MRI 2.2+ and JRuby.
 
 ## Installation
 
diff --git a/image_processing.gemspec b/image_processing.gemspec
index 54bf8fc..8c03ef2 100644
--- a/image_processing.gemspec
+++ b/image_processing.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "minitest", "~> 5.8"
-  spec.add_development_dependency "minitest-hooks"
+  spec.add_development_dependency "minitest-hooks", ">= 1.4.2"
   spec.add_development_dependency "minispec-metadata"
   spec.add_development_dependency "mini_magick", ">= 4.3.5"
   spec.add_development_dependency "ruby-vips", ">= 2.0.0"
diff --git a/lib/image_processing/mini_magick.rb b/lib/image_processing/mini_magick.rb
index 726b8dc..e84b14e 100644
--- a/lib/image_processing/mini_magick.rb
+++ b/lib/image_processing/mini_magick.rb
@@ -227,7 +227,7 @@ module ImageProcessing
     # IO object that responds to `#read(length = nil, outbuf = nil)`.
     def _copy_to_tempfile(file)
       extension = File.extname(file.path) if file.respond_to?(:path)
-      tempfile = Tempfile.new(["mini_magick", extension.to_s], binmode: true)
+      tempfile = Tempfile.new(["image_processing-mini_magick", extension.to_s], binmode: true)
       IO.copy_stream(file, tempfile.path)
       file.rewind
       tempfile