diff --git a/pavelib/utils/test/suites/nose_suite.py b/pavelib/utils/test/suites/nose_suite.py
index 7d63ffbb88..61d2225552 100644
--- a/pavelib/utils/test/suites/nose_suite.py
+++ b/pavelib/utils/test/suites/nose_suite.py
@@ -128,7 +128,7 @@ class SystemTestSuite(NoseTestSuite):
         if self.processes is None:
             # Use one process per core for LMS tests, and no multiprocessing
             # otherwise.
-            self.processes = -1 if self.root == 'lms' else 0
+            self.processes = 0
 
         self.processes = int(self.processes)