diff --git a/.travis.yml b/.travis.yml
index 1b841532d..25757c4cc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -36,12 +36,11 @@ install:
   - mkdir /tmp/work
   - cd /tmp/work
   - go mod init example.com/m
-  - if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then go get github.com/hajimehoshi/ebiten@$TRAVIS_COMMIT; fi
-  - if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then go get github.com/hajimehoshi/ebiten; fi
-  - if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then wget -O ebiten.zip https://github.com/hajimehoshi/ebiten/archive/$TRAVIS_COMMIT.zip; fi
-  - if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then unzip ebiten.zip; fi
-  - if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then mv ./ebiten-$TRAVIS_COMMIT ebiten; fi
-  - if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then go mod edit -replace=github.com/hajimehoshi/ebiten=./ebiten; fi
+  - go get github.com/hajimehoshi/ebiten
+  - wget -O ebiten.zip https://github.com/$TRAVIS_REPO_SLUG/archive/$TRAVIS_COMMIT.zip
+  - unzip ebiten.zip
+  - mv ./ebiten-$TRAVIS_COMMIT ebiten
+  - go mod edit -replace=github.com/hajimehoshi/ebiten=./ebiten
 
   # wasmbrowsertest
   - GO111MODULE=off go get github.com/agnivade/wasmbrowsertest
@@ -51,8 +50,7 @@ install:
   - GO111MODULE=off go1.12.16 get github.com/gopherjs/gopherjs
   - mkdir -p $GOPATH/src/github.com/hajimehoshi
   - cd $GOPATH/src/github.com/hajimehoshi
-  - wget -O ebiten.zip https://github.com/hajimehoshi/ebiten/archive/$TRAVIS_COMMIT.zip
-  - unzip ebiten.zip
+  - unzip /tmp/work/ebiten.zip
   - mv ./ebiten-$TRAVIS_COMMIT ebiten
   - cd ./ebiten
   - GO111MODULE=off go get -d -tags=example ./...