diff --git a/packages/google-cloud-dns/package.json b/packages/google-cloud-dns/package.json
index 0a8ae954720..3ea3d0589af 100644
--- a/packages/google-cloud-dns/package.json
+++ b/packages/google-cloud-dns/package.json
@@ -74,7 +74,6 @@
     "eslint-config-prettier": "^3.0.0",
     "eslint-plugin-node": "^7.0.0",
     "eslint-plugin-prettier": "^2.6.0",
-    "extend": "^3.0.1",
     "ink-docstrap": "^1.3.2",
     "intelli-espower-loader": "^1.0.1",
     "jsdoc": "^3.5.5",
diff --git a/packages/google-cloud-dns/system-test/dns.js b/packages/google-cloud-dns/system-test/dns.js
index 1fe34818792..f37fef5171f 100644
--- a/packages/google-cloud-dns/system-test/dns.js
+++ b/packages/google-cloud-dns/system-test/dns.js
@@ -29,8 +29,14 @@ const DNS = require('../');
 const dns = new DNS();
 const DNS_DOMAIN = process.env.GCLOUD_TESTS_DNS_DOMAIN;
 
+if (!DNS_DOMAIN) {
+  assert.fail(
+    `The 'GCLOUD_TESTS_DNS_DOMAIN' environment variable must be set to run the system tests.`
+  );
+}
+
 // Only run the tests if there is a domain to test with.
-(DNS_DOMAIN ? describe : describe.skip)('dns', function() {
+describe('dns', function() {
   if (!DNS_DOMAIN) {
     // The test runner still executes this function, even if it is skipped.
     return;