diff --git a/pom.xml b/pom.xml
index 1a80f0e..0b76f04 100644
--- a/pom.xml
+++ b/pom.xml
@@ -97,5 +97,11 @@
 			<artifactId>junit</artifactId>
 			<version>4.10</version>
 		</dependency>
+
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+			<version>12.0</version>
+		</dependency>
 	</dependencies>
 </project>
diff --git a/src/main/java/jsjunit/jetty/ResultServlet.java b/src/main/java/jsjunit/jetty/ResultServlet.java
index 71c48d9..970bb4a 100644
--- a/src/main/java/jsjunit/jetty/ResultServlet.java
+++ b/src/main/java/jsjunit/jetty/ResultServlet.java
@@ -9,6 +9,8 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import com.google.common.base.Joiner;
+
 public class ResultServlet extends HttpServlet {
 
 	private static final long serialVersionUID = 1L;
@@ -49,7 +51,7 @@ public static String getResult() {
 				throw new IllegalStateException(String.format(
 						"QUnit.done() was called %d times. Sent informations are:[%s]",
 						resultQue.size(),
-						stringify(resultQue)
+						Joiner.on(", ").join(resultQue)
 				));
 			}
 		}
@@ -57,13 +59,4 @@ public static String getResult() {
 		return result;
 	}
 
-	private static String stringify(LinkedList<String> queue) {
-		StringBuilder builder = new StringBuilder();
-		for (String result : queue) {
-			if (builder.length() > 0) { builder.append(", "); }
-			builder.append(result);
-		}
-		return builder.toString();
-	}
-
 }
diff --git a/src/main/java/jsjunit/qunit/QUnitTestRunner.java b/src/main/java/jsjunit/qunit/QUnitTestRunner.java
index 36075bd..e2d4335 100644
--- a/src/main/java/jsjunit/qunit/QUnitTestRunner.java
+++ b/src/main/java/jsjunit/qunit/QUnitTestRunner.java
@@ -22,6 +22,8 @@
 import org.junit.runners.model.InitializationError;
 import org.junit.runners.model.Statement;
 
+import com.google.common.base.Joiner;
+
 public class QUnitTestRunner extends ParentRunner<TestJS> {
 
 	private final RunnerService runnerService;
@@ -92,18 +94,8 @@ protected List<TestJS> getChildren() {
 
 	@Override
 	protected Description describeChild(TestJS child) {
-		StringBuilder sb = new StringBuilder();
-		for (String js : child.value()) {
-			if (sb.length() == 0) {
-				sb.append(js);
-			} else {
-				sb.append(",");
-				sb.append(js);
-			}
-		}
-
 		return Description.createTestDescription(getTestClass().getJavaClass(),
-				" [" + sb.toString() + "]");
+				" [" + Joiner.on(',').join(child.value()) + "]");
 	}
 
 	@Override
@@ -126,7 +118,7 @@ protected void runChild(TestJS child, RunNotifier notifier) {
 				notifier.fireTestFailure(failure);
 				return;
 			}
-			
+
 			if (child.total() >= 0 && child.total() != testResult.getTotal()) {
 				JSTestFailure failure = new JSTestFailure(describeChild(child),
 						url, "test total count should be " + child.total()
@@ -145,22 +137,22 @@ protected void runChild(TestJS child, RunNotifier notifier) {
 	private String buildMessage(QUnitResult result) {
 		StringBuilder sb = new StringBuilder();
 
-		sb.append("TEST FAILED : " + result.getPassed() + "/"
-				+ result.getTotal() + CR);
+		sb.append("TEST FAILED : ").append(result.getPassed()).append("/")
+				.append(result.getTotal()).append(CR);
 		for (QUnitTestResult tr : result.getChildren()) {
 			if (tr.getModule() != null) {
 				sb.append("[");
 				sb.append(tr.getModule());
 				sb.append("] ");
 			}
-			sb.append(tr.getName() + " (" + tr.getPassed() + "/"
-					+ tr.getTotal() + ")" + CR);
+			sb.append(tr.getName()).append(" (").append(tr.getPassed()).append("/")
+					.append(tr.getTotal()).append(")").append(CR);
 
 			for (QUnitTestDetail detail : tr.getDetails()) {
 				if (!detail.isResult()) {
-					sb.append("    " + detail.getMessage());
-					sb.append(": expected '" + detail.getExpected()
-							+ "' but actual '" + detail.getActual() + "'" + CR);
+					sb.append("    ").append(detail.getMessage());
+					sb.append(": expected '").append(detail.getExpected())
+							.append("' but actual '").append(detail.getActual()).append("'").append(CR);
 				}
 			}
 		}
diff --git a/src/main/java/jsjunit/service/PhantomJS.java b/src/main/java/jsjunit/service/PhantomJS.java
index a8114e5..75e7c22 100644
--- a/src/main/java/jsjunit/service/PhantomJS.java
+++ b/src/main/java/jsjunit/service/PhantomJS.java
@@ -13,6 +13,8 @@
 import java.util.TimerTask;
 import java.util.concurrent.TimeUnit;
 
+import com.google.common.io.Closeables;
+
 public final class PhantomJS {
 	private static class ProcessDestroyer extends TimerTask {
 
@@ -102,27 +104,14 @@ public void run() {
 			String line = null;
 			try {
 				while ((line = reader.readLine()) != null) {
-					writer.write(line + "\n");
+					writer.write(line);
+					writer.write("\n");
 				}
 			} catch (IOException e) {
 				e.printStackTrace();
 			} finally {
-				if (writer != null) {
-					try {
-						writer.close();
-					} catch (IOException e) {
-						e.printStackTrace();
-					}
-				}
-
-				if (reader != null) {
-					try {
-						reader.close();
-					} catch (IOException e) {
-						e.printStackTrace();
-					}
-				}
-
+				Closeables.closeQuietly(reader);
+				Closeables.closeQuietly(writer);
 			}
 		}
 
diff --git a/src/main/java/jsjunit/service/WorkspaceManager.java b/src/main/java/jsjunit/service/WorkspaceManager.java
index 3e7e0f4..460e575 100644
--- a/src/main/java/jsjunit/service/WorkspaceManager.java
+++ b/src/main/java/jsjunit/service/WorkspaceManager.java
@@ -1,15 +1,17 @@
 package jsjunit.service;
 
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
 import java.io.File;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.URL;
 
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.filefilter.WildcardFileFilter;
 
+import com.google.common.io.Files;
+import com.google.common.io.InputSupplier;
+import com.google.common.io.Resources;
+
 final class WorkspaceManager {
 
 	private final File runner;
@@ -126,40 +128,19 @@ private void copyLibraries(File dir) throws IOException {
 		copy(dir, QUNIT_NAME);
 	}
 
-	private void copy(File dir, String name) throws IOException {
-		InputStream in = null;
-		try {
-			in = this.getClass().getResourceAsStream("/" + name);
-
-			if (in == null) {
-				throw new IllegalStateException("can not find " + name);
-			}
-
-			BufferedInputStream is = new BufferedInputStream(in);
-
-			File dest = new File(dir, name);
-			if (!dest.exists()) {
-				BufferedOutputStream bos = null;
-				try {
-
-					bos = new BufferedOutputStream(new FileOutputStream(dest));
-
-					for (int data = is.read(); data > 0; data = is.read()) {
-						bos.write(data);
-					}
-					bos.flush();
-				} finally {
-					if (bos != null) {
-						bos.close();
-					}
-				}
-			}
-		} finally {
-			if (in != null) {
-				in.close();
-			}
+	private void copy(File dir, final String name) throws IOException {
+		File dest = new File(dir, name);
+		if (dest.exists()) {
+			return;
 		}
 
+		InputSupplier<InputStream> input = new InputSupplier<InputStream>() {
+			@Override
+			public InputStream getInput() throws IOException {
+				return getClass().getClassLoader().getResourceAsStream(name);
+			}
+		};
+		Files.copy(input, dest);
 	}
 
 	private void clean(File dir) {
@@ -173,17 +154,13 @@ private void delete(File f) {
 			return;
 		}
 
-		if (f.isFile()) {
-			f.delete();
-		}
-
 		if (f.isDirectory()) {
 			File[] files = f.listFiles();
 			for (File file : files) {
 				delete(file);
 			}
-			f.delete();
 		}
+		f.delete();
 	}
 
 }