From f9a1eeaadca7c0a84a9b8e77b13cf5605a77360b Mon Sep 17 00:00:00 2001
From: Masaharu TASHIRO <masatsr.kit@gmail.com>
Date: Mon, 21 Oct 2019 01:30:54 +0900
Subject: [PATCH] Refactor

---
 .travis.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index c014efa..c26162a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,9 +9,9 @@ rust:
 
 cache:
   directories:
-    - $HOME/.cargo
-    - $HOME/.rustup
-    - $HOME/kcov/
+    - ${HOME}/.cargo
+    - ${HOME}/.rustup
+    - ${HOME}/kcov/
 before_cache:
   - rm -rf /home/travis/.cargo/registry