diff --git a/plugins/pdr_deterministic_plugin/.pytest/run_pdr_standalone_pytest.sh b/plugins/pdr_deterministic_plugin/.pytest/run_pdr_standalone_pytest.sh
index e461532e8..bf280ba32 100644
--- a/plugins/pdr_deterministic_plugin/.pytest/run_pdr_standalone_pytest.sh
+++ b/plugins/pdr_deterministic_plugin/.pytest/run_pdr_standalone_pytest.sh
@@ -32,7 +32,7 @@ bash $PLUGIN_DIR/.pytest/terminate_pdr_standalone_pytest.sh
 echo "Starting standalone PDR process"
 python $PLUGIN_DIR/ufm_sim_web_service/isolation_algo.py >/dev/null 2>&1 &
 sleep 10
-if ! pgrep -x isolation_algo.py> /dev/null; then
+if ! ps aux | grep -q [i]solation_algo.py; then
     echo "Failed to start standalone PDR process"
     exit 1
 fi
diff --git a/plugins/pdr_deterministic_plugin/.pytest/terminate_pdr_standalone_pytest.sh b/plugins/pdr_deterministic_plugin/.pytest/terminate_pdr_standalone_pytest.sh
index d49c04239..f5c6f00b8 100644
--- a/plugins/pdr_deterministic_plugin/.pytest/terminate_pdr_standalone_pytest.sh
+++ b/plugins/pdr_deterministic_plugin/.pytest/terminate_pdr_standalone_pytest.sh
@@ -3,7 +3,7 @@
 echo "Terminating standalone PDR process"
 ps -ef | grep isolation_algo.py | grep -v grep | awk '{print $2}' | xargs kill -9 $1 >/dev/null 2>/dev/null
 sleep 10
-if pgrep -x isolation_algo.py> /dev/null; then
+if ps aux | grep -q [i]solation_algo.py; then
     echo "Failed to terminate standalone PDR process"
     exit 1
 fi