diff --git a/nopol/src/main/java/fr/inria/lille/localization/FlacocoFaultLocalizer.java b/nopol/src/main/java/fr/inria/lille/localization/FlacocoFaultLocalizer.java
index da51d743..72f91a0c 100644
--- a/nopol/src/main/java/fr/inria/lille/localization/FlacocoFaultLocalizer.java
+++ b/nopol/src/main/java/fr/inria/lille/localization/FlacocoFaultLocalizer.java
@@ -54,6 +54,7 @@ private void runFlacoco(NopolContext nopolContext, Metric metric) {
         config.setJacocoIncludes(
                 model.getAllTypes().stream().map(CtTypeInformation::getQualifiedName).collect(Collectors.toSet()));
         config.setComplianceLevel(nopolContext.getComplianceLevel());
+        config.setTestRunnerJVMArgs("-Xms2048m -Xmx2048m");
         config.setTestRunnerVerbose(true);
 
         // Set tests