diff --git a/test/message/testcfg.py b/test/message/testcfg.py
index bd56a8eba8c..4be454b55c9 100644
--- a/test/message/testcfg.py
+++ b/test/message/testcfg.py
@@ -43,6 +43,7 @@ class MessageTestCase(test.TestCase):
     self.config = config
     self.arch = arch
     self.mode = mode
+    self.parallel = True
 
   def IgnoreLine(self, str):
     """Ignore empty lines and valgrind output."""
diff --git a/test/pseudo-tty/testcfg.py b/test/pseudo-tty/testcfg.py
index ad9461f0263..df380ad31ef 100644
--- a/test/pseudo-tty/testcfg.py
+++ b/test/pseudo-tty/testcfg.py
@@ -48,6 +48,7 @@ class TTYTestCase(test.TestCase):
     self.config = config
     self.arch = arch
     self.mode = mode
+    self.parallel = True
 
   def IgnoreLine(self, str_arg):
     """Ignore empty lines and valgrind output."""