diff --git a/solr/build.xml b/solr/build.xml
index 1beacb32cf9..b84e5d8e955 100644
--- a/solr/build.xml
+++ b/solr/build.xml
@@ -394,6 +394,7 @@
     <property name="dir.prop" value=""/>
     <junit printsummary="no"
            haltonfailure="no"
+           maxmemory="512M"
            errorProperty="tests.failed"
            failureProperty="tests.failed"
            dir="src/test/test-files/"