diff --git a/initramfs_builder/new_init_jenkins b/initramfs_builder/new_init_jenkins
index 54b6969..8c66b9e 100755
--- a/initramfs_builder/new_init_jenkins
+++ b/initramfs_builder/new_init_jenkins
@@ -8,29 +8,31 @@ echo "PREP STARTING"
 cd $PWD_FOR_VM
 . "$PWD/envs"
 
-# to find insmod and poweroff programs
+# to find insmod and poweroff programs (default PATH doesn't have `/sbin`)
 export PATH="/sbin:$PATH"
 
-cd device-testing-tools/gramine-device-testing-module
-insmod gramine-testing-dev.ko
-cd -
-
-echo "PREP DONE"
-
 if test -n "$SGX"; then
     GRAMINE=gramine-sgx
 else
     GRAMINE=gramine-direct
 fi
 
-cd libos/test/regression
-gramine-test build helloworld
-$GRAMINE helloworld
+(
+    cd device-testing-tools/gramine-device-testing-module
+    insmod gramine-testing-dev.ko
+)
+echo "PREP DONE"
+
+(
+    # run only couple tests -- executing in a VM with virtio-9p-pci FS passthrough is very slow
+    cd libos/test/regression
 
-gramine-test build device_ioctl
-$GRAMINE device_ioctl
-cd -
+    gramine-test build helloworld
+    $GRAMINE helloworld
 
+    gramine-test build device_ioctl
+    $GRAMINE device_ioctl
+)
 echo "TESTS OK"
 
 poweroff -n -f