diff --git a/test/iscsi_tgt/rpc_config/rpc_config.sh b/test/iscsi_tgt/rpc_config/rpc_config.sh
index 1d27c7867..f35ff419d 100755
--- a/test/iscsi_tgt/rpc_config/rpc_config.sh
+++ b/test/iscsi_tgt/rpc_config/rpc_config.sh
@@ -32,13 +32,13 @@ $rpc_py framework_start_init
 echo "iscsi_tgt is listening. Running tests..."
 
 # RPC framework_wait_init should be already returned, so its process must be non-existed
-! ps $rpc_wait_pid
+NOT ps $rpc_wait_pid
 
 # RPC framework_wait_init will directly returned after subsystem initialized.
 $rpc_py framework_wait_init &
 rpc_wait_pid=$!
 sleep 1
-! ps $rpc_wait_pid
+NOT ps $rpc_wait_pid
 
 timing_exit start_iscsi_tgt
 
diff --git a/test/nvmf/target/rpc.sh b/test/nvmf/target/rpc.sh
index d715e4b4f..0c2be78d0 100755
--- a/test/nvmf/target/rpc.sh
+++ b/test/nvmf/target/rpc.sh
@@ -59,7 +59,7 @@ $rpc_py nvmf_subsystem_allow_any_host -d nqn.2016-06.io.spdk:cnode1
 $rpc_py nvmf_subsystem_add_listener nqn.2016-06.io.spdk:cnode1 -t $TEST_TRANSPORT -a $NVMF_FIRST_TARGET_IP -s $NVMF_PORT
 
 # This connect should fail - the host NQN is not allowed
-! nvme connect -t $TEST_TRANSPORT -n nqn.2016-06.io.spdk:cnode1 -q nqn.2016-06.io.spdk:host1 -a "$NVMF_FIRST_TARGET_IP" -s "$NVMF_PORT"
+NOT nvme connect -t $TEST_TRANSPORT -n nqn.2016-06.io.spdk:cnode1 -q nqn.2016-06.io.spdk:host1 -a "$NVMF_FIRST_TARGET_IP" -s "$NVMF_PORT"
 
 # Add the host NQN and verify that the connect succeeds
 $rpc_py nvmf_subsystem_add_host nqn.2016-06.io.spdk:cnode1 nqn.2016-06.io.spdk:host1
@@ -69,7 +69,7 @@ nvme disconnect -n nqn.2016-06.io.spdk:cnode1
 
 # Remove the host and verify that the connect fails
 $rpc_py nvmf_subsystem_remove_host nqn.2016-06.io.spdk:cnode1 nqn.2016-06.io.spdk:host1
-! nvme connect -t $TEST_TRANSPORT -n nqn.2016-06.io.spdk:cnode1 -q nqn.2016-06.io.spdk:host1 -a "$NVMF_FIRST_TARGET_IP" -s "$NVMF_PORT"
+NOT nvme connect -t $TEST_TRANSPORT -n nqn.2016-06.io.spdk:cnode1 -q nqn.2016-06.io.spdk:host1 -a "$NVMF_FIRST_TARGET_IP" -s "$NVMF_PORT"
 
 # Allow any host and verify that the connect succeeds
 $rpc_py nvmf_subsystem_allow_any_host -e nqn.2016-06.io.spdk:cnode1
diff --git a/test/ocf/management/remove.sh b/test/ocf/management/remove.sh
index c06234080..b07f1a0ab 100755
--- a/test/ocf/management/remove.sh
+++ b/test/ocf/management/remove.sh
@@ -60,7 +60,7 @@ $rpc_py bdev_ocf_delete ocfWT
 
 # Check that ocfWT was deleted properly
 
-! $rpc_py bdev_ocf_get_bdevs | jq -r '.[] .name' | grep -qw ocfWT
+[[ -z $("$rpc_py" bdev_ocf_get_bdevs | jq -r '.[] | select(.name == "ocfWT") | .name') ]]
 
 trap - SIGINT SIGTERM EXIT
 
@@ -76,7 +76,7 @@ waitforlisten $spdk_pid
 
 # Check that ocfWT was not loaded on app start
 
-! $rpc_py bdev_ocf_get_bdevs | jq -r '.[] .name' | grep -qw ocfWT
+[[ -z $("$rpc_py" bdev_ocf_get_bdevs | jq -r '.[] | select(name == "ocfWT") | .name') ]]
 
 trap - SIGINT SIGTERM EXIT