diff --git a/.travis.yml b/.travis.yml
index bd41673..1beea25 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,7 @@ dist: trusty
 cache: apt
 before_install:
  - sudo apt-get update -qq
- - sudo apt-get install -qq cppcheck libfuse-dev
- - sudo apt-get install openjdk-7-jdk
- - sudo update-alternatives --config java
+ - sudo apt-get install -qq cppcheck libfuse-dev openjdk-7-jdk
 script:
  - ./autogen.sh
  - ./configure
diff --git a/test/integration-test-common.sh b/test/integration-test-common.sh
index 5368cf3..a1c872c 100644
--- a/test/integration-test-common.sh
+++ b/test/integration-test-common.sh
@@ -99,6 +99,15 @@ function start_s3proxy {
     else
         S3PROXY_CONFIG="s3proxy.conf"
     fi
+    JAVA_BIN=`which java`
+    if [ $? -ne 0 ]; then
+        if [ -f /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java ]; then
+            JAVA_BIN=/usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java
+        else
+            # not found java command, so probabry gets error by stdbuf command line.
+            JAVA_BIN=java
+        fi
+    fi
 
     if [ -n "${S3PROXY_BINARY}" ]
     then
@@ -108,7 +117,7 @@ function start_s3proxy {
             chmod +x "${S3PROXY_BINARY}"
         fi
 
-        stdbuf -oL -eL java -jar "$S3PROXY_BINARY" --properties $S3PROXY_CONFIG | stdbuf -oL -eL sed -u "s/^/s3proxy: /" &
+        stdbuf -oL -eL ${JAVA_BIN} -jar "$S3PROXY_BINARY" --properties $S3PROXY_CONFIG | stdbuf -oL -eL sed -u "s/^/s3proxy: /" &
 
         # wait for S3Proxy to start
         for i in $(seq 30);