diff --git a/.jshintrc b/.jshintrc
index 6c2235e4..8d8bdb70 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -5,6 +5,7 @@
   "maxcomplexity": 13,
   "globals": {
     "before": true,
+    "beforeEach": true,
     "after": true,
     "describe": true,
     "it": true
diff --git a/packaging/test.sh b/packaging/test.sh
index a494122f..cb7dc531 100755
--- a/packaging/test.sh
+++ b/packaging/test.sh
@@ -6,13 +6,13 @@ if ! type docker >/dev/null; then
   exit 1
 fi
 
-test="npm run clean; NODE_ENV=development npm install --unsafe-perm; npm test"
+test="npm run clean; npm install --unsafe-perm; npm test"
 
 # Debian 7, 8
 # Ubuntu 12.04, 14.04
 for dist in wheezy jessie precise trusty; do
   echo "Testing $dist..."
-  if docker run -i -t --rm -v $PWD:/v nodesource/$dist:0.12 >packaging/$dist.log 2>&1 sh -c "cd /v; ./packaging/test/debian.sh; $test";
+  if docker run -i -t --rm -v $PWD:/v -e "NODE_ENV=development" nodesource/$dist:0.12 >packaging/$dist.log 2>&1 sh -c "cd /v; ./packaging/test/debian.sh; $test";
   then echo "$dist OK"
   else echo "$dist fail" && cat packaging/$dist.log
   fi
@@ -20,7 +20,7 @@ done
 
 # Centos 6
 echo "Testing centos6..."
-if docker run -i -t --rm -v $PWD:/v nodesource/centos6:0.12 >packaging/centos6.log 2>&1 sh -c "cd /v; source ./packaging/test/centos6.sh; ./preinstall.sh; $test";
+if docker run -i -t --rm -v $PWD:/v -e "NODE_ENV=development" nodesource/centos6:0.12 >packaging/centos6.log 2>&1 sh -c "cd /v; source ./packaging/test/centos6.sh; ./preinstall.sh; $test";
 then echo "centos6 OK"
 else echo "centos6 fail" && cat packaging/centos6.log
 fi
@@ -29,7 +29,7 @@ fi
 # Fedora 20, 21
 for dist in centos7 fedora20 fedora21; do
   echo "Testing $dist..."
-  if docker run -i -t --rm -v $PWD:/v nodesource/$dist:0.12 >packaging/$dist.log 2>&1 sh -c "cd /v; $test";
+  if docker run -i -t --rm -v $PWD:/v -e "NODE_ENV=development" nodesource/$dist:0.12 >packaging/$dist.log 2>&1 sh -c "cd /v; $test";
   then echo "$dist OK"
   else echo "$dist fail" && cat packaging/$dist.log
   fi
@@ -48,3 +48,10 @@ if docker run -i -t --rm -v $PWD:/v base/archlinux:2015.06.01 >packaging/archlin
 then echo "archlinux OK"
 else echo "archlinux fail" && cat packaging/archlinux.log
 fi
+
+# Alpine
+echo "Testing alpine..."
+if docker run -i -t --rm -v $PWD:/v -e "SHARP_TEST_WITHOUT_CACHE=0" wjordan/libvips >packaging/alpine.log 2>&1 sh -c "cd /v; ./packaging/test/alpine.sh; $test";
+then echo "alpine OK"
+else echo "alpine fail" && cat packaging/alpine.log
+fi
diff --git a/packaging/test/alpine.sh b/packaging/test/alpine.sh
new file mode 100755
index 00000000..ab8a4a32
--- /dev/null
+++ b/packaging/test/alpine.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# Install Node.js
+apk add --update make gcc g++ python nodejs
+
+# Install libvips dependencies
+apk add --update glib-dev libpng-dev libwebp-dev libexif-dev libxml2-dev orc-dev fftw-dev lcms2-dev
diff --git a/test/unit/cache.js b/test/unit/cache.js
new file mode 100644
index 00000000..7f113edc
--- /dev/null
+++ b/test/unit/cache.js
@@ -0,0 +1,9 @@
+'use strict';
+
+var sharp = require('../../index');
+
+// Define SHARP_TEST_WITHOUT_CACHE environment variable to prevent use of libvips' cache
+
+beforeEach(function() {
+  sharp.cache(process.env.SHARP_TEST_WITHOUT_CACHE ? false : true);
+});
diff --git a/test/unit/colourspace.js b/test/unit/colourspace.js
index af07ff8d..2582516e 100644
--- a/test/unit/colourspace.js
+++ b/test/unit/colourspace.js
@@ -29,7 +29,7 @@ describe('Colour space conversion', function() {
       .toFile(fixtures.path('output.greyscale-not.jpg'), done);
   });
 
-  if (sharp.format.webp.output.buffer) {
+  if (sharp.format.tiff.input.file && sharp.format.webp.output.buffer) {
     it('From 1-bit TIFF to sRGB WebP [slow]', function(done) {
       sharp(fixtures.inputTiff)
         .webp()
diff --git a/test/unit/extract.js b/test/unit/extract.js
index 608557cd..2191c618 100644
--- a/test/unit/extract.js
+++ b/test/unit/extract.js
@@ -65,17 +65,19 @@ describe('Partial image extraction', function() {
     });
   }
 
-  it('TIFF', function(done) {
-    sharp(fixtures.inputTiff)
-      .extract({ left: 34, top: 63, width: 341, height: 529 })
-      .jpeg()
-      .toBuffer(function(err, data, info) {
-        if (err) throw err;
-        assert.strictEqual(341, info.width);
-        assert.strictEqual(529, info.height);
-        fixtures.assertSimilar(fixtures.expected('extract.tiff'), data, done);
-      });
-  });
+  if (sharp.format.tiff.output.file) {
+    it('TIFF', function(done) {
+      sharp(fixtures.inputTiff)
+        .extract({ left: 34, top: 63, width: 341, height: 529 })
+        .jpeg()
+        .toBuffer(function(err, data, info) {
+          if (err) throw err;
+          assert.strictEqual(341, info.width);
+          assert.strictEqual(529, info.height);
+          fixtures.assertSimilar(fixtures.expected('extract.tiff'), data, done);
+        });
+    });
+  }
 
   it('Before resize', function(done) {
     sharp(fixtures.inputJpg)
diff --git a/test/unit/io.js b/test/unit/io.js
index 845045ce..307b57e9 100644
--- a/test/unit/io.js
+++ b/test/unit/io.js
@@ -438,19 +438,21 @@ describe('Input/output', function() {
       });
     }
 
-    it('Match TIFF input', function(done) {
-      sharp(fixtures.inputTiff)
-        .resize(320, 80)
-        .toFile(fixtures.outputZoinks, function(err, info) {
-          if (err) throw err;
-          assert.strictEqual(true, info.size > 0);
-          assert.strictEqual('tiff', info.format);
-          assert.strictEqual(320, info.width);
-          assert.strictEqual(80, info.height);
-          fs.unlinkSync(fixtures.outputZoinks);
-          done();
-        });
-    });
+    if (sharp.format.tiff.input.file) {
+      it('Match TIFF input', function(done) {
+        sharp(fixtures.inputTiff)
+          .resize(320, 80)
+          .toFile(fixtures.outputZoinks, function(err, info) {
+            if (err) throw err;
+            assert.strictEqual(true, info.size > 0);
+            assert.strictEqual('tiff', info.format);
+            assert.strictEqual(320, info.width);
+            assert.strictEqual(80, info.height);
+            fs.unlinkSync(fixtures.outputZoinks);
+            done();
+          });
+      });
+    }
 
     it('Match GIF input, therefore fail', function(done) {
       sharp(fixtures.inputGif)
diff --git a/test/unit/metadata.js b/test/unit/metadata.js
index 956ed304..26e48fca 100644
--- a/test/unit/metadata.js
+++ b/test/unit/metadata.js
@@ -55,22 +55,24 @@ describe('Image metadata', function() {
     });
   });
 
-  it('TIFF', function(done) {
-    sharp(fixtures.inputTiff).metadata(function(err, metadata) {
-      if (err) throw err;
-      assert.strictEqual('tiff', metadata.format);
-      assert.strictEqual(2464, metadata.width);
-      assert.strictEqual(3248, metadata.height);
-      assert.strictEqual('b-w', metadata.space);
-      assert.strictEqual(1, metadata.channels);
-      assert.strictEqual(false, metadata.hasProfile);
-      assert.strictEqual(false, metadata.hasAlpha);
-      assert.strictEqual('undefined', typeof metadata.orientation);
-      assert.strictEqual('undefined', typeof metadata.exif);
-      assert.strictEqual('undefined', typeof metadata.icc);
-      done();
+  if (sharp.format.tiff.input.file) {
+    it('TIFF', function(done) {
+      sharp(fixtures.inputTiff).metadata(function(err, metadata) {
+        if (err) throw err;
+        assert.strictEqual('tiff', metadata.format);
+        assert.strictEqual(2464, metadata.width);
+        assert.strictEqual(3248, metadata.height);
+        assert.strictEqual('b-w', metadata.space);
+        assert.strictEqual(1, metadata.channels);
+        assert.strictEqual(false, metadata.hasProfile);
+        assert.strictEqual(false, metadata.hasAlpha);
+        assert.strictEqual('undefined', typeof metadata.orientation);
+        assert.strictEqual('undefined', typeof metadata.exif);
+        assert.strictEqual('undefined', typeof metadata.icc);
+        done();
+      });
     });
-  });
+  }
 
   it('PNG', function(done) {
     sharp(fixtures.inputPng).metadata(function(err, metadata) {
@@ -125,21 +127,23 @@ describe('Image metadata', function() {
     });
   }
 
-  it('GIF via libmagick', function(done) {
-    sharp(fixtures.inputGif).metadata(function(err, metadata) {
-      if (err) throw err;
-      assert.strictEqual('magick', metadata.format);
-      assert.strictEqual(800, metadata.width);
-      assert.strictEqual(533, metadata.height);
-      assert.strictEqual(3, metadata.channels);
-      assert.strictEqual(false, metadata.hasProfile);
-      assert.strictEqual(false, metadata.hasAlpha);
-      assert.strictEqual('undefined', typeof metadata.orientation);
-      assert.strictEqual('undefined', typeof metadata.exif);
-      assert.strictEqual('undefined', typeof metadata.icc);
-      done();
+  if (sharp.format.magick.input.file) {
+    it('GIF via libmagick', function(done) {
+      sharp(fixtures.inputGif).metadata(function(err, metadata) {
+        if (err) throw err;
+        assert.strictEqual('magick', metadata.format);
+        assert.strictEqual(800, metadata.width);
+        assert.strictEqual(533, metadata.height);
+        assert.strictEqual(3, metadata.channels);
+        assert.strictEqual(false, metadata.hasProfile);
+        assert.strictEqual(false, metadata.hasAlpha);
+        assert.strictEqual('undefined', typeof metadata.orientation);
+        assert.strictEqual('undefined', typeof metadata.exif);
+        assert.strictEqual('undefined', typeof metadata.icc);
+        done();
+      });
     });
-  });
+  }
 
   if (sharp.format.openslide.input.file) {
     it('Aperio SVS via openslide', function(done) {
diff --git a/test/unit/resize.js b/test/unit/resize.js
index f991ed05..cf134e17 100644
--- a/test/unit/resize.js
+++ b/test/unit/resize.js
@@ -128,27 +128,58 @@ describe('Resize dimensions', function() {
     done();
   });
 
-  it('TIFF embed known to cause rounding errors', function(done) {
-    sharp(fixtures.inputTiff).resize(240, 320).embed().jpeg().toBuffer(function(err, data, info) {
-      if (err) throw err;
-      assert.strictEqual(true, data.length > 0);
-      assert.strictEqual('jpeg', info.format);
-      assert.strictEqual(240, info.width);
-      assert.strictEqual(320, info.height);
-      done();
+  if (sharp.format.tiff.input.file) {
+    it('TIFF embed known to cause rounding errors', function(done) {
+      sharp(fixtures.inputTiff)
+        .resize(240, 320)
+        .embed()
+        .jpeg()
+        .toBuffer(function(err, data, info) {
+          if (err) throw err;
+          assert.strictEqual(true, data.length > 0);
+          assert.strictEqual('jpeg', info.format);
+          assert.strictEqual(240, info.width);
+          assert.strictEqual(320, info.height);
+          done();
+        });
     });
-  });
 
-  it('TIFF known to cause rounding errors', function(done) {
-    sharp(fixtures.inputTiff).resize(240, 320).jpeg().toBuffer(function(err, data, info) {
-      if (err) throw err;
-      assert.strictEqual(true, data.length > 0);
-      assert.strictEqual('jpeg', info.format);
-      assert.strictEqual(240, info.width);
-      assert.strictEqual(320, info.height);
-      done();
+    it('TIFF known to cause rounding errors', function(done) {
+      sharp(fixtures.inputTiff)
+        .resize(240, 320)
+        .jpeg()
+        .toBuffer(function(err, data, info) {
+          if (err) throw err;
+          assert.strictEqual(true, data.length > 0);
+          assert.strictEqual('jpeg', info.format);
+          assert.strictEqual(240, info.width);
+          assert.strictEqual(320, info.height);
+          done();
+        });
     });
-  });
+
+    it('Max width or height considering ratio (portrait)', function(done) {
+      sharp(fixtures.inputTiff).resize(320, 320).max().jpeg().toBuffer(function(err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual('jpeg', info.format);
+        assert.strictEqual(243, info.width);
+        assert.strictEqual(320, info.height);
+        done();
+      });
+    });
+
+    it('Min width or height considering ratio (portrait)', function(done) {
+      sharp(fixtures.inputTiff).resize(320, 320).min().jpeg().toBuffer(function(err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual('jpeg', info.format);
+        assert.strictEqual(320, info.width);
+        assert.strictEqual(422, info.height);
+        done();
+      });
+    });
+  }
 
   it('Max width or height considering ratio (landscape)', function(done) {
     sharp(fixtures.inputJpg).resize(320, 320).max().toBuffer(function(err, data, info) {
@@ -161,17 +192,6 @@ describe('Resize dimensions', function() {
     });
   });
 
-  it('Max width or height considering ratio (portrait)', function(done) {
-    sharp(fixtures.inputTiff).resize(320, 320).max().jpeg().toBuffer(function(err, data, info) {
-      if (err) throw err;
-      assert.strictEqual(true, data.length > 0);
-      assert.strictEqual('jpeg', info.format);
-      assert.strictEqual(243, info.width);
-      assert.strictEqual(320, info.height);
-      done();
-    });
-  });
-
   it('Provide only one dimension with max, should default to crop', function(done) {
     sharp(fixtures.inputJpg).resize(320).max().toBuffer(function(err, data, info) {
       if (err) throw err;
@@ -194,17 +214,6 @@ describe('Resize dimensions', function() {
     });
   });
 
-  it('Min width or height considering ratio (portrait)', function(done) {
-    sharp(fixtures.inputTiff).resize(320, 320).min().jpeg().toBuffer(function(err, data, info) {
-      if (err) throw err;
-      assert.strictEqual(true, data.length > 0);
-      assert.strictEqual('jpeg', info.format);
-      assert.strictEqual(320, info.width);
-      assert.strictEqual(422, info.height);
-      done();
-    });
-  });
-
   it('Provide only one dimension with min, should default to crop', function(done) {
     sharp(fixtures.inputJpg).resize(320).min().toBuffer(function(err, data, info) {
       if (err) throw err;
diff --git a/test/unit/rotate.js b/test/unit/rotate.js
index b1e6d7a6..a7eac21d 100644
--- a/test/unit/rotate.js
+++ b/test/unit/rotate.js
@@ -111,7 +111,7 @@ describe('Rotation', function() {
   });
 
   it('Attempt to auto-rotate image format without EXIF support', function(done) {
-    sharp(fixtures.inputGif)
+    sharp(fixtures.inputPng)
       .rotate()
       .resize(320)
       .jpeg()
@@ -120,7 +120,7 @@ describe('Rotation', function() {
         assert.strictEqual(true, data.length > 0);
         assert.strictEqual('jpeg', info.format);
         assert.strictEqual(320, info.width);
-        assert.strictEqual(213, info.height);
+        assert.strictEqual(236, info.height);
         done();
       });
   });