diff --git a/benchmark/_http-benchmarkers.js b/benchmark/_http-benchmarkers.js
index f9359b13d5e9e4..54b7481afaa817 100644
--- a/benchmark/_http-benchmarkers.js
+++ b/benchmark/_http-benchmarkers.js
@@ -91,11 +91,9 @@ class TestDoubleBenchmarker {
   create(options) {
     const child = child_process.fork(this.executable, {
       silent: true,
-      env: {
-        duration: options.duration,
-        connections: options.connections,
-        path: `http://127.0.0.1:${options.port}${options.path}`
-      }
+      env: Object.assign({}, process.env, {
+        test_url: `http://127.0.0.1:${options.port}${options.path}`
+      })
     });
     return child;
   }
diff --git a/benchmark/_test-double-benchmarker.js b/benchmark/_test-double-benchmarker.js
index 0a8c5f9264efc8..8c2f744fbf6e9f 100644
--- a/benchmark/_test-double-benchmarker.js
+++ b/benchmark/_test-double-benchmarker.js
@@ -2,6 +2,6 @@
 
 const http = require('http');
 
-http.get(process.env.path, function() {
+http.get(process.env.test_url, function() {
   console.log(JSON.stringify({ throughput: 1 }));
 });
diff --git a/test/parallel/test-child-process-fork-no-shell.js b/test/parallel/test-child-process-fork-no-shell.js
index 7a085913fbf4a3..168f115b0cbcbf 100644
--- a/test/parallel/test-child-process-fork-no-shell.js
+++ b/test/parallel/test-child-process-fork-no-shell.js
@@ -8,7 +8,7 @@ const expected = common.isWindows ? '%foo%' : '$foo';
 if (process.argv[2] === undefined) {
   const child = cp.fork(__filename, [expected], {
     shell: true,
-    env: { foo: 'bar' }
+    env: Object.assign({}, process.env, { foo: 'bar' })
   });
 
   child.on('exit', common.mustCall((code, signal) => {
diff --git a/test/sequential/test-inspector-port-cluster.js b/test/sequential/test-inspector-port-cluster.js
index 3b2464d81268b4..2428a7844e98c0 100644
--- a/test/sequential/test-inspector-port-cluster.js
+++ b/test/sequential/test-inspector-port-cluster.js
@@ -311,11 +311,11 @@ function workerProcessMain() {
 function spawnMaster({ execArgv, workers, clusterSettings = {} }) {
   return new Promise((resolve) => {
     childProcess.fork(__filename, {
-      env: {
+      env: Object.assign({}, process.env, {
         workers: JSON.stringify(workers),
         clusterSettings: JSON.stringify(clusterSettings),
         testProcess: true
-      },
+      }),
       execArgv
     }).on('exit', common.mustCall((code, signal) => {
       checkExitCode(code, signal);