diff --git a/test/unit/alpha.js b/test/unit/alpha.js
index 1b6f9a87..d022f762 100755
--- a/test/unit/alpha.js
+++ b/test/unit/alpha.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Alpha transparency', function() {
 
   it('Flatten to black', function(done) {
diff --git a/test/unit/blur.js b/test/unit/blur.js
index 7faa9115..352b200b 100755
--- a/test/unit/blur.js
+++ b/test/unit/blur.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Blur', function() {
 
   it('specific radius', function(done) {
diff --git a/test/unit/colourspace.js b/test/unit/colourspace.js
index 3f6e4ee7..d501aad2 100755
--- a/test/unit/colourspace.js
+++ b/test/unit/colourspace.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Colour space conversion', function() {
 
   it('To greyscale', function(done) {
diff --git a/test/unit/crop.js b/test/unit/crop.js
index c9e8ff11..644804c8 100755
--- a/test/unit/crop.js
+++ b/test/unit/crop.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Crop gravities', function() {
 
   it('North', function(done) {
diff --git a/test/unit/embed.js b/test/unit/embed.js
index 5e36bdba..0c4956ef 100755
--- a/test/unit/embed.js
+++ b/test/unit/embed.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Embed', function() {
 
   it('JPEG within PNG, no alpha channel', function(done) {
diff --git a/test/unit/extract.js b/test/unit/extract.js
index 5e66afc6..366bd823 100755
--- a/test/unit/extract.js
+++ b/test/unit/extract.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Partial image extraction', function() {
 
   it('JPEG', function(done) {
diff --git a/test/unit/gamma.js b/test/unit/gamma.js
index 9542a13a..350a9ef9 100755
--- a/test/unit/gamma.js
+++ b/test/unit/gamma.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Gamma correction', function() {
 
   it('value of 0.0 (disabled)', function(done) {
diff --git a/test/unit/interpolation.js b/test/unit/interpolation.js
index 81ade380..db9bfc0a 100755
--- a/test/unit/interpolation.js
+++ b/test/unit/interpolation.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Interpolation', function() {
 
   it('nearest neighbour', function(done) {
diff --git a/test/unit/io.js b/test/unit/io.js
index e50a3ada..aed88e28 100755
--- a/test/unit/io.js
+++ b/test/unit/io.js
@@ -8,6 +8,8 @@ var semver = require('semver');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Input/output', function() {
 
   it('Read from File and write to Stream', function(done) {
diff --git a/test/unit/metadata.js b/test/unit/metadata.js
index 36ad3bbd..5d99c4fd 100755
--- a/test/unit/metadata.js
+++ b/test/unit/metadata.js
@@ -6,6 +6,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Image metadata', function() {
 
   it('JPEG', function(done) {
diff --git a/test/unit/resize.js b/test/unit/resize.js
index 9fdfd7f9..93f4b34c 100755
--- a/test/unit/resize.js
+++ b/test/unit/resize.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Resize dimensions', function() {
 
   it('Exact crop', function(done) {
diff --git a/test/unit/rotate.js b/test/unit/rotate.js
index 03413f67..58f473a5 100755
--- a/test/unit/rotate.js
+++ b/test/unit/rotate.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Rotation', function() {
 
   it('Rotate by 90 degrees, respecting output input size', function(done) {
diff --git a/test/unit/sharpen.js b/test/unit/sharpen.js
index b8853853..49cd7388 100755
--- a/test/unit/sharpen.js
+++ b/test/unit/sharpen.js
@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Sharpen', function() {
 
   it('specific radius and levels 0.5, 2.5', function(done) {