diff --git a/.travis.yml b/.travis.yml
index f82aea2..8777fe2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,20 @@ go:
   - 1.3
   - 1.4
 
+env:
+  - LIBWEBP_VERSION="0.4.1"
+  - LIBWEBP_VERSION="0.4.2"
+
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq libwebp
+  - sudo apt-get install -qq libjpeg-dev libpng-dev libtiff-dev libgif-dev
+  - > 
+      cd /tmp
+      && wget http://downloads.webmproject.org/releases/webp/libwebp-${LIBWEBP_VERSION}.tar.gz
+      && tar xf libwebp-${LIBWEBP_VERSION}.tar.gz
+      && cd libwebp-${LIBWEBP_VERSION}
+      && ./configure
+      && make
+      && sudo make install
+  - cd $HOME/gopath/src/github.com/harukasan/go-libwebp
+  - export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
diff --git a/test/util/util.go b/test/util/util.go
index 2dc2398..c284b75 100644
--- a/test/util/util.go
+++ b/test/util/util.go
@@ -3,22 +3,36 @@ package util
 
 import (
 	"bufio"
+	"fmt"
 	"image"
 	"image/png"
 	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"strings"
 )
 
 // GetExFilePath returns the path of specified example file.
 func GetExFilePath(name string) string {
-	return filepath.Join(os.Getenv("GOPATH"), "src/github.com/harukasan/go-libwebp/examples/images", name)
+	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
+		path := filepath.Join(gopath, "src/github.com/harukasan/go-libwebp/examples/images", name)
+		if _, err := os.Stat(path); err == nil {
+			return path
+		}
+	}
+	panic(fmt.Errorf("%v does not exist in any directory which contains in $GOPATH", name))
 }
 
 // GetOutFilePath returns the path of specified out file.
 func GetOutFilePath(name string) string {
-	return filepath.Join(os.Getenv("GOPATH"), "src/github.com/harukasan/go-libwebp/examples/out", name)
+	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
+		path := filepath.Join(gopath, "src/github.com/harukasan/go-libwebp/examples/out")
+		if _, err := os.Stat(path); err == nil {
+			return filepath.Join(path, name)
+		}
+	}
+	panic(fmt.Errorf("out directory does not exist in any directory which contains in $GOPATH"))
 }
 
 // OpenFile opens specified example file