diff --git a/test/parallel/test-dgram-send-callback-multi-buffer.js b/test/parallel/test-dgram-send-callback-multi-buffer.js
index 3004bfe39b8203..a60d42cc45d49e 100644
--- a/test/parallel/test-dgram-send-callback-multi-buffer.js
+++ b/test/parallel/test-dgram-send-callback-multi-buffer.js
@@ -6,13 +6,8 @@ const dgram = require('dgram');
 
 const client = dgram.createSocket('udp4');
 
-const timer = setTimeout(function() {
-  throw new Error('Timeout');
-}, common.platformTimeout(200));
-
 const messageSent = common.mustCall(function messageSent(err, bytes) {
   assert.equal(bytes, buf1.length + buf2.length);
-  clearTimeout(timer);
 });
 
 const buf1 = Buffer.alloc(256, 'x');
diff --git a/test/parallel/test-dgram-send-multi-buffer-copy.js b/test/parallel/test-dgram-send-multi-buffer-copy.js
index 19222dac5fbd11..0b7f003335b545 100644
--- a/test/parallel/test-dgram-send-multi-buffer-copy.js
+++ b/test/parallel/test-dgram-send-multi-buffer-copy.js
@@ -6,13 +6,8 @@ const dgram = require('dgram');
 
 const client = dgram.createSocket('udp4');
 
-const timer = setTimeout(function() {
-  throw new Error('Timeout');
-}, common.platformTimeout(200));
-
 const onMessage = common.mustCall(function(err, bytes) {
   assert.equal(bytes, buf1.length + buf2.length);
-  clearTimeout(timer);
 });
 
 const buf1 = Buffer.alloc(256, 'x');
diff --git a/test/parallel/test-tls-server-failed-handshake-emits-clienterror.js b/test/parallel/test-tls-server-failed-handshake-emits-clienterror.js
index a404dc904ba7b7..bd92dc28904183 100644
--- a/test/parallel/test-tls-server-failed-handshake-emits-clienterror.js
+++ b/test/parallel/test-tls-server-failed-handshake-emits-clienterror.js
@@ -11,7 +11,6 @@ const assert = require('assert');
 
 const bonkers = Buffer.alloc(1024, 42);
 
-let tlsClientErrorEmited = false;
 
 const server = tls.createServer({})
   .listen(0, function() {
@@ -19,19 +18,12 @@ const server = tls.createServer({})
       c.write(bonkers);
     });
 
-  }).on('tlsClientError', function(e) {
-    tlsClientErrorEmited = true;
+  }).on('tlsClientError', common.mustCall(function(e) {
     assert.ok(e instanceof Error,
               'Instance of Error should be passed to error handler');
     assert.ok(e.message.match(
       /SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol/),
       'Expecting SSL unknown protocol');
-  });
 
-setTimeout(function() {
-  server.close();
-
-  assert.ok(tlsClientErrorEmited,
-            'tlsClientError should be emited');
-
-}, common.platformTimeout(200));
+    server.close();
+  }));
diff --git a/test/parallel/test-http-client-timeout-with-data.js b/test/sequential/test-http-client-timeout-with-data.js
similarity index 100%
rename from test/parallel/test-http-client-timeout-with-data.js
rename to test/sequential/test-http-client-timeout-with-data.js
diff --git a/test/parallel/test-http-server-consumed-timeout.js b/test/sequential/test-http-server-consumed-timeout.js
similarity index 100%
rename from test/parallel/test-http-server-consumed-timeout.js
rename to test/sequential/test-http-server-consumed-timeout.js
diff --git a/test/parallel/test-timers-blocking-callback.js b/test/sequential/test-timers-blocking-callback.js
similarity index 100%
rename from test/parallel/test-timers-blocking-callback.js
rename to test/sequential/test-timers-blocking-callback.js
diff --git a/test/parallel/test-timers-same-timeout-wrong-list-deleted.js b/test/sequential/test-timers-same-timeout-wrong-list-deleted.js
similarity index 100%
rename from test/parallel/test-timers-same-timeout-wrong-list-deleted.js
rename to test/sequential/test-timers-same-timeout-wrong-list-deleted.js