diff --git a/ci-scripts/oai-ci-vm-tool b/ci-scripts/oai-ci-vm-tool
index 1375fb6194e64431b8bd421557e0b3d935b08ada..940bcd28523a7df9bbafbaf5a1cfcf3c1e6b6656 100755
--- a/ci-scripts/oai-ci-vm-tool
+++ b/ci-scripts/oai-ci-vm-tool
@@ -254,6 +254,7 @@ case $key in
     LOG_PATTERN=.Rel15.txt
     NB_PATTERN_FILES=8
     BUILD_OPTIONS="--phy_simulators"
+    VM_MEMORY=4096
     RUN_OPTIONS="./run_exec_autotests.bash -g \"01510*\" -q -np -b"
     NBARGS=$[$NBARGS+256]
     shift
@@ -332,6 +333,7 @@ case $key in
         LOG_PATTERN=.Rel15.txt
         NB_PATTERN_FILES=8
         BUILD_OPTIONS="--phy_simulators"
+	VM_MEMORY=4096
         RUN_OPTIONS="./run_exec_autotests.bash -g \"01510*\" -q -np -b"
         NBARGS=$[$NBARGS+256]
         ;;