diff --git a/.eslintrc.json b/.eslintrc.json
index b3069eb689..73acfd71ca 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -5,8 +5,6 @@
   },
   "rules": {
     "node/no-missing-require": ["off"], 
-    "node/no-unpublished-require": ["off"], 
-    "node/no-deprecated-api": ["off"],
-    "no-process-exit": ["off"]
+    "node/no-unpublished-require": ["off"]
   }
 }
\ No newline at end of file
diff --git a/cloud-sql/mysql/mysql/server.js b/cloud-sql/mysql/mysql/server.js
index bf85ca5357..2757302c54 100644
--- a/cloud-sql/mysql/mysql/server.js
+++ b/cloud-sql/mysql/mysql/server.js
@@ -130,7 +130,7 @@ const poolPromise = createPool()
   })
   .catch(err => {
     logger.error(err);
-    process.exit(1);
+    throw err;
   });
 
 app.use(async (req, res, next) => {
@@ -222,7 +222,7 @@ const server = app.listen(PORT, () => {
 
 process.on('unhandledRejection', err => {
   console.error(err);
-  process.exit(1);
+  throw err;
 });
 
 module.exports = server;
diff --git a/cloud-sql/sqlserver/mssql/server.js b/cloud-sql/sqlserver/mssql/server.js
index 320c8abad8..20151559c1 100644
--- a/cloud-sql/sqlserver/mssql/server.js
+++ b/cloud-sql/sqlserver/mssql/server.js
@@ -107,7 +107,7 @@ const poolPromise = createPool()
   })
   .catch(err => {
     logger.error(err);
-    process.exit(1);
+    throw err;
   });
 
 app.use(async (req, res, next) => {
@@ -224,7 +224,7 @@ const environment = process.env.NODE_ENV || 'development';
 if (environment === 'development') {
   process.on('unhandledRejection', err => {
     console.error(err);
-    process.exit(1);
+    throw err;
   });
 }
 
diff --git a/eventarc/audit-storage/test/system.test.js b/eventarc/audit-storage/test/system.test.js
index b028f53ef2..159f30037a 100644
--- a/eventarc/audit-storage/test/system.test.js
+++ b/eventarc/audit-storage/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const got = require('got');
-const {resolve} = require('url');
 
 const request = (method, route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const request = (method, route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return got(resolve(base_url.trim(), route), {
+  return got(new URL(route, base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },
diff --git a/eventarc/generic/test/system.test.js b/eventarc/generic/test/system.test.js
index b028f53ef2..159f30037a 100644
--- a/eventarc/generic/test/system.test.js
+++ b/eventarc/generic/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const got = require('got');
-const {resolve} = require('url');
 
 const request = (method, route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const request = (method, route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return got(resolve(base_url.trim(), route), {
+  return got(new URL(route, base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },
diff --git a/eventarc/pubsub/test/system.test.js b/eventarc/pubsub/test/system.test.js
index b028f53ef2..159f30037a 100644
--- a/eventarc/pubsub/test/system.test.js
+++ b/eventarc/pubsub/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const got = require('got');
-const {resolve} = require('url');
 
 const request = (method, route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const request = (method, route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return got(resolve(base_url.trim(), route), {
+  return got(new URL(route, base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },
diff --git a/run/hello-broken/package.json b/run/hello-broken/package.json
index 5cc803e074..a273ea76b8 100644
--- a/run/hello-broken/package.json
+++ b/run/hello-broken/package.json
@@ -11,6 +11,9 @@
     "lint": "eslint '**/*.js'",
     "fix": "eslint --fix '**/*.js'"
   },
+  "engines": {
+    "node": ">= 10.0.0"
+  },
   "author": "Google LLC",
   "license": "Apache-2.0",
   "dependencies": {
diff --git a/run/hello-broken/test/system.test.js b/run/hello-broken/test/system.test.js
index 0f43eb6546..f7fd7e7689 100644
--- a/run/hello-broken/test/system.test.js
+++ b/run/hello-broken/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const request = require('got');
-const {resolve} = require('url');
 
 const get = (route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const get = (route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return request(resolve(base_url.trim(), route), {
+  return request(new URL(route, base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },
diff --git a/run/helloworld/package.json b/run/helloworld/package.json
index 11f958a3b6..209403ac42 100644
--- a/run/helloworld/package.json
+++ b/run/helloworld/package.json
@@ -11,6 +11,9 @@
     "lint": "eslint '**/*.js'",
     "fix": "eslint --fix '**/*.js'"
   },
+  "engines": {
+    "node": ">= 12.0.0"
+  },
   "author": "Google LLC",
   "license": "Apache-2.0",
   "dependencies": {
diff --git a/run/helloworld/test/system.test.js b/run/helloworld/test/system.test.js
index 0e60988ac7..bea717b1da 100644
--- a/run/helloworld/test/system.test.js
+++ b/run/helloworld/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const request = require('got');
-const {resolve} = require('url');
 
 const get = (route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const get = (route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return request(resolve(base_url.trim(), route), {
+  return request(new URL(route, base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },
diff --git a/run/image-processing/test/system.test.js b/run/image-processing/test/system.test.js
index cfdfe72c74..f93257cd6e 100644
--- a/run/image-processing/test/system.test.js
+++ b/run/image-processing/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const got = require('got');
-const {resolve} = require('url');
 
 const request = (method, route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const request = (method, route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return got(resolve(base_url.trim(), route), {
+  return got(new URL(route, base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },
diff --git a/run/markdown-preview/renderer/test/system.test.js b/run/markdown-preview/renderer/test/system.test.js
index cfdfe72c74..e0db5fcf79 100644
--- a/run/markdown-preview/renderer/test/system.test.js
+++ b/run/markdown-preview/renderer/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const got = require('got');
-const {resolve} = require('url');
 
 const request = (method, route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const request = (method, route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return got(resolve(base_url.trim(), route), {
+  return got(route, new URL(base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },
diff --git a/run/pubsub/test/system.test.js b/run/pubsub/test/system.test.js
index cfdfe72c74..f93257cd6e 100644
--- a/run/pubsub/test/system.test.js
+++ b/run/pubsub/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const got = require('got');
-const {resolve} = require('url');
 
 const request = (method, route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const request = (method, route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return got(resolve(base_url.trim(), route), {
+  return got(new URL(route, base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },
diff --git a/run/system-package/package.json b/run/system-package/package.json
index a4011fe51e..5dfd256bcc 100644
--- a/run/system-package/package.json
+++ b/run/system-package/package.json
@@ -9,6 +9,9 @@
     "test": "mocha test/app.test.js --check-leaks",
     "system-test": "test/runner.sh mocha test/system.test.js --timeout=10000"
   },
+  "engines": {
+    "node": ">= 12.0.0"
+  },
   "dependencies": {
     "express": "^4.17.1"
   },
diff --git a/run/system-package/test/system.test.js b/run/system-package/test/system.test.js
index c8158c3090..e463b3bf72 100644
--- a/run/system-package/test/system.test.js
+++ b/run/system-package/test/system.test.js
@@ -14,7 +14,6 @@
 
 const assert = require('assert');
 const got = require('got');
-const {resolve} = require('url');
 
 const request = (method, route, base_url) => {
   const {ID_TOKEN} = process.env;
@@ -22,7 +21,7 @@ const request = (method, route, base_url) => {
     throw Error('"ID_TOKEN" environment variable is required.');
   }
 
-  return got(resolve(base_url.trim(), route), {
+  return got(new URL(route, base_url.trim()), {
     headers: {
       Authorization: `Bearer ${ID_TOKEN.trim()}`,
     },