diff --git a/.travis.yml b/.travis.yml
index bf7d0c6..c66834a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,12 +8,6 @@ go:
  - 1.11.x
  - master
 
-env:
- - TAGS=""
- - TAGS="-tags bounds"
- - TAGS="-tags noasm"
- - TAGS="-tags appengine"
-
 matrix:
  fast_finish: true
  allow_failures:
@@ -40,7 +34,9 @@ script:
  - go get -d -t -v ./...
  - go build -v ./...
  - go test -v ./...
- - go test -a $TAGS -v ./...
+ - go test -a -tags bounds -v ./...
+ - go test -a -tags noasm -v ./...
+ - go test -a -tags appengine -v ./...
  - if [[ $TRAVIS_SECURE_ENV_VARS = "true" ]]; then bash ./.travis/test-coverage.sh; fi
  - ${TRAVIS_BUILD_DIR}/.travis/check-imports.sh
 # This is run last since it alters the tree.