diff --git a/test/common.js b/test/common.js
index 1ef491e4033d27..1e85d3db33be48 100644
--- a/test/common.js
+++ b/test/common.js
@@ -179,6 +179,16 @@ exports.spawnPwd = function(options) {
   }
 };
 
+exports.platformTimeout = function(ms) {
+  if (process.arch !== 'arm')
+    return ms;
+
+  if (process.config.variables.arm_version === '6')
+    return 6 * ms;  // ARMv6
+
+  return 2 * ms;  // ARMv7 and up.
+};
+
 var knownGlobals = [setTimeout,
                     setInterval,
                     setImmediate,
diff --git a/test/parallel/test-child-process-fork-net2.js b/test/parallel/test-child-process-fork-net2.js
index 171abb729a4751..c69fe84eadd787 100644
--- a/test/parallel/test-child-process-fork-net2.js
+++ b/test/parallel/test-child-process-fork-net2.js
@@ -128,13 +128,13 @@ if (process.argv[2] === 'child') {
 
   server.listen(common.PORT, '127.0.0.1');
 
-  var timeElasped = 0;
+  var timeElapsed = 0;
   var closeServer = function() {
     console.error('[m] closeServer');
     var startTime = Date.now();
     server.on('close', function() {
       console.error('[m] emit(close)');
-      timeElasped = Date.now() - startTime;
+      timeElapsed = Date.now() - startTime;
     });
 
     console.error('[m] calling server.close');
@@ -149,11 +149,14 @@ if (process.argv[2] === 'child') {
     }, 200);
   };
 
+  var min = 190;
+  var max = common.platformTimeout(1500);
   process.on('exit', function() {
     assert.equal(disconnected, count);
     assert.equal(connected, count);
     assert.ok(closeEmitted);
-    assert.ok(timeElasped >= 190 && timeElasped <= 1000,
-              'timeElasped was not between 190 and 1000 ms');
+    assert.ok(timeElapsed >= min && timeElapsed <= max,
+              `timeElapsed was not between ${min} and ${max} ms:` +
+              `${timeElapsed}`);
   });
 }
diff --git a/test/parallel/test-debug-signal-cluster.js b/test/parallel/test-debug-signal-cluster.js
index 026e2932622e13..c8b03875908a5a 100644
--- a/test/parallel/test-debug-signal-cluster.js
+++ b/test/parallel/test-debug-signal-cluster.js
@@ -51,7 +51,7 @@ function onNoMoreLines() {
 
 setTimeout(function testTimedOut() {
   assert(false, 'test timed out.');
-}, 6000).unref();
+}, common.platformTimeout(3000)).unref();
 
 process.on('exit', function onExit() {
   // Kill processes in reverse order to avoid timing problems on Windows where
diff --git a/test/parallel/test-fs-empty-readStream.js b/test/parallel/test-fs-empty-readStream.js
index bd6e1912977afc..0c470076da7df1 100644
--- a/test/parallel/test-fs-empty-readStream.js
+++ b/test/parallel/test-fs-empty-readStream.js
@@ -22,7 +22,7 @@ fs.open(emptyFile, 'r', function (error, fd) {
 
   setTimeout(function () {
     assert.equal(readEmit, true);
-  }, 50);
+  }, common.platformTimeout(50));
 });
 
 fs.open(emptyFile, 'r', function (error, fd) {
@@ -43,5 +43,5 @@ fs.open(emptyFile, 'r', function (error, fd) {
 
   setTimeout(function () {
     assert.equal(readEmit, false);
-  }, 50);
+  }, common.platformTimeout(50));
 });
diff --git a/test/parallel/test-http-end-throw-socket-handling.js b/test/parallel/test-http-end-throw-socket-handling.js
index a8566beac8cbd7..92a5ae6a38d0fb 100644
--- a/test/parallel/test-http-end-throw-socket-handling.js
+++ b/test/parallel/test-http-end-throw-socket-handling.js
@@ -32,7 +32,7 @@ server.listen(common.PORT, function() {
 setTimeout(function() {
   process.removeListener('uncaughtException', catcher);
   throw new Error('Taking too long!');
-}, 1000).unref();
+}, common.platformTimeout(1000)).unref();
 
 process.on('uncaughtException', catcher);
 var errors = 0;
diff --git a/test/parallel/test-repl-timeout-throw.js b/test/parallel/test-repl-timeout-throw.js
index f171341345179e..eea2bea3ac9389 100644
--- a/test/parallel/test-repl-timeout-throw.js
+++ b/test/parallel/test-repl-timeout-throw.js
@@ -44,7 +44,7 @@ child.stdout.once('data', function() {
                       '  });\n' +
                       '});"";\n');
 
-    setTimeout(child.stdin.end.bind(child.stdin), 200);
+    setTimeout(child.stdin.end.bind(child.stdin), common.platformTimeout(200));
   }
 });
 
diff --git a/test/parallel/test-tls-fast-writing.js b/test/parallel/test-tls-fast-writing.js
index 7fd3c8f9dcd95e..e9245aa0d5eae1 100644
--- a/test/parallel/test-tls-fast-writing.js
+++ b/test/parallel/test-tls-fast-writing.js
@@ -22,7 +22,7 @@ var gotDrain = false;
 var timer = setTimeout(function() {
   console.log('not ok - timed out');
   process.exit(1);
-}, 500);
+}, common.platformTimeout(500));
 
 function onconnection(conn) {
   conn.on('data', function(c) {
diff --git a/test/parallel/test-tls-wrap-timeout.js b/test/parallel/test-tls-wrap-timeout.js
index 7bb5bb1b0dffb7..3013f68886597f 100644
--- a/test/parallel/test-tls-wrap-timeout.js
+++ b/test/parallel/test-tls-wrap-timeout.js
@@ -27,7 +27,9 @@ var server = tls.createServer(options, function(c) {
 
 server.listen(common.PORT, function() {
   var socket = net.connect(common.PORT, function() {
-    socket.setTimeout(240, assert.fail);
+    socket.setTimeout(common.platformTimeout(240), function() {
+      throw new Error('timeout');
+    });
 
     var tsocket = tls.connect({
       socket: socket,
diff --git a/test/sequential/test-force-repl.js b/test/sequential/test-force-repl.js
index fa17297ad257b2..c0ad1484ff25cc 100644
--- a/test/sequential/test-force-repl.js
+++ b/test/sequential/test-force-repl.js
@@ -7,7 +7,7 @@ var cp = spawn(process.execPath, ['-i']);
 var gotToEnd = false;
 var timeoutId = setTimeout(function() {
   throw new Error('timeout!');
-}, 1000); // give node + the repl 1 second to boot up
+}, common.platformTimeout(1000)); // give node + the repl 1 second to boot up
 
 cp.stdout.setEncoding('utf8');
 
diff --git a/test/sequential/test-net-GH-5504.js b/test/sequential/test-net-GH-5504.js
index ef2e1ceb29bebf..2ee0a1d86d7af3 100644
--- a/test/sequential/test-net-GH-5504.js
+++ b/test/sequential/test-net-GH-5504.js
@@ -72,7 +72,7 @@ function parent() {
     setTimeout(function() {
       throw new Error('hang');
     });
-  }, 4000).unref();
+  }, common.platformTimeout(2000)).unref();
 
   var s = spawn(node, [__filename, 'server'], opt);
   var c;
diff --git a/tools/test.py b/tools/test.py
index efb2ed7f3ce4ef..1de2661dc3a2b8 100755
--- a/tools/test.py
+++ b/tools/test.py
@@ -729,8 +729,9 @@ def GetTestStatus(self, context, sections, defs):
     'debug'   : ['--enable-slow-asserts', '--debug-code', '--verify-heap'],
     'release' : []}
 TIMEOUT_SCALEFACTOR = {
-    'arm'  : { 'debug' : 8, 'release' : 2 },  # The ARM buildbots are slow.
-    'ia32' : { 'debug' : 4, 'release' : 1 } }
+    'armv6' : { 'debug' : 12, 'release' : 3 },  # The ARM buildbots are slow.
+    'arm'   : { 'debug' :  8, 'release' : 2 },
+    'ia32'  : { 'debug' :  4, 'release' : 1 } }
 
 
 class Context(object):
diff --git a/tools/utils.py b/tools/utils.py
index 2b312a2e103d08..03c56aefb85b59 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -73,7 +73,9 @@ def GuessOS():
 def GuessArchitecture():
   id = platform.machine()
   id = id.lower()  # Windows 7 capitalizes 'AMD64'.
-  if id.startswith('arm') or id == 'aarch64':
+  if id.startswith('armv6'): # Can return 'armv6l'.
+    return 'armv6'
+  elif id.startswith('arm') or id == 'aarch64':
     return 'arm'
   elif (not id) or (not re.match('(x|i[3-6])86$', id) is None):
     return 'ia32'