diff --git a/test/fixtures/clustered-server/app.js b/test/fixtures/clustered-server/app.js
index 4053cd3af27..3fca2aaa42f 100644
--- a/test/fixtures/clustered-server/app.js
+++ b/test/fixtures/clustered-server/app.js
@@ -16,6 +16,16 @@ if (cluster.isMaster) {
     }
   });
 
+  process.on('message', function(msg) {
+    if (msg.type === 'getpids') {
+      var pids = [];
+      pids.push(process.pid);
+      for (var key in cluster.workers)
+        pids.push(cluster.workers[key].process.pid);
+      process.send({ type: 'pids', pids: pids });
+    }
+  });
+
   for (var i = 0; i < NUMBER_OF_WORKERS; i++) {
     cluster.fork();
   }
diff --git a/test/simple/test-debug-signal-cluster.js b/test/simple/test-debug-signal-cluster.js
index 09dc3b4c2fd..27d53910b74 100644
--- a/test/simple/test-debug-signal-cluster.js
+++ b/test/simple/test-debug-signal-cluster.js
@@ -24,11 +24,15 @@ var assert = require('assert');
 var spawn = require('child_process').spawn;
 
 var args = [ common.fixturesDir + '/clustered-server/app.js' ];
-var child = spawn(process.execPath, args);
+var child = spawn(process.execPath, args, {
+  stdio: [ 'pipe', 'pipe', 'pipe', 'ipc' ]
+});
 var outputLines = [];
 var outputTimerId;
 var waitingForDebuggers = false;
 
+var pids = null;
+
 child.stderr.on('data', function(data) {
   var lines = data.toString().replace(/\r/g, '').trim().split('\n');
   var line = lines[0];
@@ -42,8 +46,20 @@ child.stderr.on('data', function(data) {
     outputLines = outputLines.concat(lines);
     outputTimerId = setTimeout(onNoMoreLines, 800);
   } else if (line === 'all workers are running') {
-    waitingForDebuggers = true;
-    process._debugProcess(child.pid);
+    child.on('message', function(msg) {
+      if (msg.type !== 'pids')
+        return;
+
+      pids = msg.pids;
+      console.error('got pids %j', pids);
+
+      waitingForDebuggers = true;
+      process._debugProcess(child.pid);
+    });
+
+    child.send({
+      type: 'getpids'
+    });
   }
 });
 
@@ -57,7 +73,9 @@ setTimeout(function testTimedOut() {
 }, 6000);
 
 process.on('exit', function onExit() {
-    child.kill();
+  pids.forEach(function(pid) {
+    process.kill(pid);
+  });
 });
 
 function assertOutputLines() {