diff --git a/tests/ft/neuron/process.py b/tests/ft/neuron/process.py
index 9288a20f..1db3d81b 100644
--- a/tests/ft/neuron/process.py
+++ b/tests/ft/neuron/process.py
@@ -5,6 +5,7 @@ import subprocess
 
 def remove_persistence(dir='build/'):
     os.system("rm -rf " + dir + "/persistence/sqlite.db")
+    os.system("rm -rf " + dir + "/persistence/*")
     os.system("mkdir -p " + dir + "/persistence")