install pypy 2.6.0 in container infra
diff --git a/.travis/install.sh b/.travis/install.sh
index 9db2743..a046a5d 100755
--- a/.travis/install.sh
+++ b/.travis/install.sh
@@ -51,6 +51,15 @@
     pyenv rehash
     python -m pip install --user virtualenv
 else
+    # temporary pyenv installation to get pypy-2.6 before container infra upgrade
+    if [[ "${TOXENV}" == "pypy" ]]; then
+        git clone https://github.com/yyuu/pyenv.git ~/.pyenv
+        PYENV_ROOT="$HOME/.pyenv"
+        PATH="$PYENV_ROOT/bin:$PATH"
+        eval "$(pyenv init -)"
+        pyenv install pypy-2.6.0
+        pyenv global pypy-2.6.0
+    fi
     pip install virtualenv
 fi
 
diff --git a/.travis/run.sh b/.travis/run.sh
index 1efbd60..1735865 100755
--- a/.travis/run.sh
+++ b/.travis/run.sh
@@ -16,6 +16,13 @@
         # CommonCrypto when we test against brew OpenSSL
         export TOX_FLAGS="--backend=openssl"
     fi
+else
+    if [[ "${TOXENV}" == "pypy" ]]; then
+        PYENV_ROOT="$HOME/.pyenv"
+        PATH="$PYENV_ROOT/bin:$PATH"
+        eval "$(pyenv init -)"
+        pyenv global pypy-2.6.0
+    fi
 fi
 source ~/.venv/bin/activate
 tox -- $TOX_FLAGS