diff --git a/gulpfile.js b/gulpfile.js
index 776df90..79e0ed9 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -36,6 +36,11 @@ gulp.task('linting', function() {
     .pipe(stylish.combineWithHintResults())   // combine with jshint results
     .pipe(jshint.reporter('jshint-stylish')); // use any jshint reporter to log hint
 });
+gulp.task('runtest', function() {
+  var mocha = require('gulp-mocha');
+  return gulp.src('test/basic.js', { read: false })
+    .pipe(mocha());
+});
 
 
 gulp.task('watch', function() {
@@ -46,4 +51,4 @@ gulp.task('watch', function() {
 
 gulp.task('project', ['project:basic']);
 gulp.task('default', ['watch']);
-gulp.task('test', ['linting']);
+gulp.task('test', ['linting', 'runtest']);
diff --git a/index.js b/index.js
index 8218d8d..1bf9b72 100644
--- a/index.js
+++ b/index.js
@@ -29,7 +29,7 @@ var GROUP_MASK        = '*';
 var BACKGROUND        = 'background';
 var BACKGROUND_IMAGE  = 'background-image';
 
-module.exports = postcss.plugin('postcss-easysprite', function(opts) {
+module.exports = postcss.plugin('postcss-easysprites', function(opts) {
   opts = opts || {};
 
   // opts
@@ -99,7 +99,8 @@ function collectImages(css, opts) {
         return;
       }
 
-      image.groups = [imageUrl.hash.replace('#', '')];
+      image.hash = imageUrl.hash.replace('#', '');
+      image.groups = [image.hash];
 
       // Perform search for retina
       if (isRetinaImage(image.url)) {
@@ -109,6 +110,18 @@ function collectImages(css, opts) {
       // Get the path to the image.
       image.path = resolveUrl(image, opts);
 
+      // file exists
+      if (!fs.existsSync(image.path)) {
+        log('Easysprites:', gutil.colors.red(image.path), 'file unreachable or not exists');
+
+        // remove hash from link
+        lodash.each(rule.nodes, function(node) {
+          node.value = node.value.replace('#' + image.hash, '');
+        });
+
+        return rule;
+      }
+
       images.push(image);
     }
   });
@@ -295,7 +308,7 @@ function saveSprites(images, opts, sprites) {
         // if this file is up to date
         if (sprite.isFromCache) {
           var deferred = Q.defer();
-          log('Easysprite:', gutil.colors.green(sprite.path), 'unchanged.');
+          log('Easysprites:', gutil.colors.green(sprite.path), 'unchanged.');
           deferred.resolve(sprite);
           return deferred.promise;
         }
@@ -303,7 +316,7 @@ function saveSprites(images, opts, sprites) {
         // save new file version
         return Q.nfcall(fs.writeFile, sprite.path, new Buffer(sprite.image, 'binary'))
           .then(function() {
-            log('Easysprite:', gutil.colors.yellow(sprite.path), 'generated.');
+            log('Easysprites:', gutil.colors.yellow(sprite.path), 'generated.');
             return sprite;
           });
       })
diff --git a/test/basic.js b/test/basic.js
old mode 100644
new mode 100755
index 7243cc2..6dfdeda
--- a/test/basic.js
+++ b/test/basic.js
@@ -1,17 +1,130 @@
+
 var postcss = require('postcss');
 var expect  = require('chai').expect;
 var plugin = require('../');
 
-var assert = function (input, output, opts, done) {
-    postcss([ plugin(opts) ]).process(input).then(function (result) {
-        expect(result.css).to.eql(output);
-        expect(result.warnings()).to.be.empty;
-        done();
-    }).catch(function (error) {
-        done(error);
-    });
+function cacheLog() {
+  console.logback = console.log;
+  console.log = function(){
+    var args = Array.prototype.slice.call(arguments);
+    console.logback.apply(console, ['cached'].concat(args));
+    console.lastMessage = Array.prototype.slice.call(arguments).join(' ');
+  };
+}
+
+function uncacheLog() {
+  console.log = console.logback;
+  return console.lastMessage;
+}
+
+var assert = function(input, output, opts, done) {
+  postcss([plugin(opts)]).process(input).then(function(result) {
+    expect(result.css).to.eql(output);
+    expect(result.warnings()).to.be.empty;
+    done();
+  }).catch(function(error) {
+    done(error);
+  });
+};
+
+var assertCached = function(input, output, opts, done) {
+  cacheLog();
+
+  postcss([plugin(opts)]).process(input).then(function(result) {
+    expect(result.css).to.eql(output);
+    expect(result.warnings()).to.be.empty;
+
+    if (uncacheLog().indexOf('unchanged') === -1) {
+      return done(new Error('Cache is not working'));
+    }
+
+    done();
+  }).catch(function(error) {
+    done(error);
+  });
 };
 
-describe('postcss-easysprite', function (done) {
-  assert('a {}', 'a {}', {}, done);
+var assertNotCached = function(input, output, opts, done) {
+  cacheLog();
+
+  postcss([plugin(opts)]).process(input).then(function(result) {
+    expect(result.css).to.eql(output);
+    expect(result.warnings()).to.be.empty;
+    if (uncacheLog().indexOf('generated') === -1) {
+      return done(new Error('Sprite already cached, code red!'));
+    }
+
+    done();
+  }).catch(function(error) {
+    done(error);
+  });
+};
+
+describe('postcss-easysprites', function() {
+
+  it('Relative images test', function(done) {
+    assert(
+      'a { background: url("images/arrow-next.png#elements"); }',
+      'a { background-image: url(sprites/elements.png); background-position: 0 0; }',
+      {
+        stylesheetPath:'./test/basic',
+        spritePath: './test/basic/sprites',
+      }, done);
+  });
+
+  it('Absolute images test', function(done) {
+    assert(
+      'a { background: url("/images/arrow-next.png#elements"); }',
+      'a { background-image: url(sprites/elements.png); background-position: 0 0; }',
+      {
+        imagePath:'./test/basic',
+        stylesheetPath:'./test/basic', // need here cause of inline call
+        spritePath: './test/basic/sprites',
+      }, done);
+  });
+
+  it('Retina images test', function(done) {
+    assert(
+      'a { background: url("/images/arrow-next@2x.png#elements"); }',
+      'a { background-image: url(sprites/elements@2x.png); background-position: 0 0; background-size: 28px 27px; }',
+      {
+        imagePath:'./test/basic',
+        stylesheetPath:'./test/basic', // need here cause of inline call
+        spritePath: './test/basic/sprites',
+      }, done);
+  });
+
+  it('Not exists image test', function(done) {
+    assert(
+      'a { background: url("/images/image-not-exists.png#elements"); }',
+      'a { background: url("/images/image-not-exists.png"); }',
+      {
+        imagePath:'./test/basic',
+        stylesheetPath:'./test/basic', // need here cause of inline call
+        spritePath: './test/basic/sprites',
+      }, done);
+  });
+
+  it('Assert sprite not cached', function(done) {
+    assertNotCached(
+      'a { background: url("images/arrow-next_hover.png#elements"); }',
+      'a { background-image: url(sprites/elements.png); background-position: 0 0; }',
+      {
+        imagePath:'./test/basic',
+        stylesheetPath:'./test/basic', // need here cause of inline call
+        spritePath: './test/basic/sprites',
+      }, done);
+  });
+
+  it('Assert sprite cached', function(done) {
+    assertCached(
+      'a { background: url("images/arrow-next_hover.png#elements"); }',
+      'a { background-image: url(sprites/elements.png); background-position: 0 0; }',
+      {
+        imagePath:'./test/basic',
+        stylesheetPath:'./test/basic', // need here cause of inline call
+        spritePath: './test/basic/sprites',
+      }, done);
+  });
+
 });
diff --git a/test/basic/sprites/elements.png b/test/basic/sprites/elements.png
index 21e6420..f3df995 100644
Binary files a/test/basic/sprites/elements.png and b/test/basic/sprites/elements.png differ
diff --git a/test/basic/sprites/elements@2x.png b/test/basic/sprites/elements@2x.png
index 46c5e55..dba4529 100644
Binary files a/test/basic/sprites/elements@2x.png and b/test/basic/sprites/elements@2x.png differ