diff --git a/.travis.yml b/.travis.yml
index 540085204..b75d5f96b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -45,7 +45,7 @@ before_install:
   - "node ./node_modules/lodash-cli/bin/lodash $BUILD -o ./dist/lodash.$BUILD.js"
 script:
   - "[ $ISTANBUL == false ]    || (nvm install 0.11.11 && $BIN --harmony ./node_modules/istanbul/lib/cli.js cover -x \"**/vendor/**\" --report lcovonly ./test/test.js -- ./dist/lodash.$BUILD.js)"
-  - "[ $ISTANBUL == true ] && [ $TRAVIS_PULL_REQUEST == false ] && nvm use 0.10 && cat ./coverage/lcov.info | coveralls && rm -rf ./coverage || true"
+  - "[ $ISTANBUL == true ] && [ $TRAVIS_SECURE_ENV_VARS == true ] && nvm use 0.10 && cat ./coverage/lcov.info | coveralls && rm -rf ./coverage || true"
   - "([ $SAUCE_LABS == true ]  || [ $ISTANBUL == true ]) || cd ./test"
   - "([ $SAUCE_LABS == true ]  || [ $ISTANBUL == true ]) || $BIN $OPTION ./test.js ../dist/lodash.$BUILD.js"
   - "([ $SAUCE_LABS == true ]  || [ $ISTANBUL == true ]) || $BIN $OPTION ./test.js ../dist/lodash.$BUILD.min.js"
diff --git a/test/saucelabs.js b/test/saucelabs.js
index 45e2b0b8c..eb0101af0 100644
--- a/test/saucelabs.js
+++ b/test/saucelabs.js
@@ -4,8 +4,8 @@
 /** Environment shortcut */
 var env = process.env;
 
-if (isFinite(env.TRAVIS_PULL_REQUEST)) {
-  console.log('Skipping Sauce Labs jobs for pull requests');
+if (env.TRAVIS_SECURE_ENV_VARS == 'false') {
+  console.log('Skipping Sauce Labs jobs; secure environment variables are unavailable');
   process.exit(0);
 }