Test on stable and beta.

Author: Ms2ger

.travis.yml

@@ -14,13 +14,15 @@ before_install:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install gcc-4.7 g++-4.7; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.7 20; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.7 20; fi
+
 rust:
   - nightly
-env:
-  - FEATURES=""
-  - FEATURES="plugins"
+  - beta
+  - stable
+
 script:
-  - cargo build --features "$FEATURES"
-  - cargo test --features "$FEATURES"
+  - cargo test
+  - ([ $TRAVIS_RUST_VERSION != nightly ] || cargo test --features plugins)
+
 notifications:
   webhooks: http://build.servo.org:54856/travis