diff --git a/hadoop-project/pom.xml b/hadoop-project/pom.xml
index be01de2e29d..b0635cac21a 100644
--- a/hadoop-project/pom.xml
+++ b/hadoop-project/pom.xml
@@ -40,7 +40,7 @@
     <test.exclude.pattern>_</test.exclude.pattern>
 
     <!-- number of threads/forks to use when running tests in parallel, see parallel-tests profile -->
-    <testsThreadCount>4</testsThreadCount>
+    <testsThreadCount>2</testsThreadCount>
 
     <!-- These 2 versions are defined here because they are used -->
     <!-- JDIFF generation from embedded ant in the antrun plugin -->