diff --git a/lib/tools/weightChecker/gzipCompressor.js b/lib/tools/weightChecker/gzipCompressor.js
index b3f8e33..15e0e4d 100644
--- a/lib/tools/weightChecker/gzipCompressor.js
+++ b/lib/tools/weightChecker/gzipCompressor.js
@@ -66,7 +66,7 @@ var GzipCompressor = function() {
                     var compressedSize = buffer.length;
 
                     if (gainIsEnough(uncompressedSize, compressedSize)) {
-                        debug('Minified file correctly gziped, was %d and is now %d bytes', uncompressedSize, compressedSize);
+                        debug('Correctly gziped the minified file, was %d and is now %d bytes', uncompressedSize, compressedSize);
 
                         entry.weightCheck.afterOptimizationAndCompression = compressedSize;
                     } else {
diff --git a/lib/tools/weightChecker/imageOptimizer.js b/lib/tools/weightChecker/imageOptimizer.js
index 06fc9fa..a0b90d5 100644
--- a/lib/tools/weightChecker/imageOptimizer.js
+++ b/lib/tools/weightChecker/imageOptimizer.js
@@ -129,7 +129,7 @@ var ImageOptimizer = function() {
                 debug('SVG lossless compression complete for %s', entry.url);
                 
                 if (gainIsEnough(fileSize, newFileSize)) {
-                    entry.weightCheck.bodyAfterOptimization = newFile;
+                    entry.weightCheck.bodyAfterOptimization = newFile.contents.toString();
                     entry.weightCheck.lossless = entry.weightCheck.optimized = newFileSize;
                     entry.weightCheck.isOptimized = false;
                     debug('Filesize is %d bytes smaller (-%d%)', fileSize - newFileSize, Math.round((fileSize - newFileSize) * 100 / fileSize));
diff --git a/test/core/fileMinifierTest.js b/test/core/fileMinifierTest.js
index b06d012..33e3db3 100644
--- a/test/core/fileMinifierTest.js
+++ b/test/core/fileMinifierTest.js
@@ -51,7 +51,7 @@ describe('fileMinifier', function() {
         .then(function(newEntry) {
             newEntry.weightCheck.should.have.a.property('isOptimized').that.equals(false);
             newEntry.weightCheck.should.have.a.property('optimized').that.is.below(fileSize);
-            newEntry.weightCheck.should.have.a.property('bodyAfterOptimization');
+            newEntry.weightCheck.should.have.a.property('bodyAfterOptimization').that.is.a('string');
 
             done();
         })
@@ -193,7 +193,7 @@ describe('fileMinifier', function() {
         .then(function(newEntry) {
             newEntry.weightCheck.should.have.a.property('isOptimized').that.equals(false);
             newEntry.weightCheck.should.have.a.property('optimized').that.is.below(fileSize);
-            newEntry.weightCheck.should.have.a.property('bodyAfterOptimization');
+            newEntry.weightCheck.should.have.a.property('bodyAfterOptimization').that.is.a('string');
 
             done();
         })
diff --git a/test/core/imageOptimizerTest.js b/test/core/imageOptimizerTest.js
index 3f5f923..ba273db 100644
--- a/test/core/imageOptimizerTest.js
+++ b/test/core/imageOptimizerTest.js
@@ -208,7 +208,7 @@ describe('imageOptimizer', function() {
             newEntry.weightCheck.should.have.a.property('isOptimized').that.equals(false);
             newEntry.weightCheck.should.have.a.property('lossless').that.is.below(fileSize);
             newEntry.weightCheck.should.have.a.property('optimized').that.equals(newEntry.weightCheck.lossless);
-            newEntry.weightCheck.should.have.a.property('bodyAfterOptimization');
+            newEntry.weightCheck.should.have.a.property('bodyAfterOptimization').that.is.a('string');
 
             done();
         })