diff --git a/tests/drivers/dac/dac_api/src/test_dac.c b/tests/drivers/dac/dac_api/src/test_dac.c
index 44277d7c7fbe3a4..ae03ee582645fd3 100644
--- a/tests/drivers/dac/dac_api/src/test_dac.c
+++ b/tests/drivers/dac/dac_api/src/test_dac.c
@@ -87,7 +87,8 @@
 
 static const struct dac_channel_cfg dac_ch_cfg = {
 	.channel_id  = DAC_CHANNEL_ID,
-	.resolution  = DAC_RESOLUTION
+	.resolution  = DAC_RESOLUTION,
+	.buffered = true
 };
 
 const struct device *get_dac_device(void)
diff --git a/tests/drivers/dac/dac_loopback/src/test_dac.c b/tests/drivers/dac/dac_loopback/src/test_dac.c
index 122218c36457966..13b53180e5d398f 100644
--- a/tests/drivers/dac/dac_loopback/src/test_dac.c
+++ b/tests/drivers/dac/dac_loopback/src/test_dac.c
@@ -148,7 +148,8 @@
 
 static const struct dac_channel_cfg dac_ch_cfg = {
 	.channel_id = DAC_CHANNEL_ID,
-	.resolution = DAC_RESOLUTION
+	.resolution = DAC_RESOLUTION,
+	.buffered = true
 };
 
 static const struct adc_channel_cfg adc_ch_cfg = {