diff --git a/app/module/drivers/kscan/kscan_mock.c b/app/module/drivers/kscan/kscan_mock.c
index 1ffb937e8c4..24158fb4a47 100644
--- a/app/module/drivers/kscan/kscan_mock.c
+++ b/app/module/drivers/kscan/kscan_mock.c
@@ -52,7 +52,7 @@ static int kscan_mock_configure(const struct device *dev, kscan_callback_t callb
     static void kscan_mock_schedule_next_event_##n(const struct device *dev) {                     \
         struct kscan_mock_data *data = dev->data;                                                  \
         const struct kscan_mock_config_##n *cfg = dev->config;                                     \
-        if (data->event_index < DT_INST_PROP_LEN(n, events)) {                                     \
+        if (data->event_index < DT_INST_PROP_LEN(n, events) - 1) {                                 \
             uint32_t ev = cfg->events[data->event_index];                                          \
             LOG_DBG("delaying next keypress: %d", ZMK_MOCK_MSEC(ev));                              \
             k_work_schedule(&data->work, K_MSEC(ZMK_MOCK_MSEC(ev)));                               \