diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 5c2910c..82bd919 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -538,6 +538,17 @@
 		compatible = "sandbox,smem";
 	};
 
+	sound {
+		compatible = "sandbox,sound";
+		cpu {
+			sound-dai = <&i2s 0>;
+		};
+
+		codec {
+			sound-dai = <&audio 0>;
+		};
+	};
+
 	spi@0 {
 		#address-cells = <1>;
 		#size-cells = <0>;
diff --git a/arch/sandbox/include/asm/test.h b/arch/sandbox/include/asm/test.h
index 71bd50b..74f9618 100644
--- a/arch/sandbox/include/asm/test.h
+++ b/arch/sandbox/include/asm/test.h
@@ -141,4 +141,24 @@
  */
 int sandbox_get_i2s_sum(struct udevice *dev);
 
+/**
+ * sandbox_get_setup_called() - Returns the number of times setup(*) was called
+ *
+ * This is used in the sound test
+ *
+ * @dev: Device to check
+ * @return call count for the setup() method
+ */
+int sandbox_get_setup_called(struct udevice *dev);
+
+/**
+ * sandbox_get_sound_sum() - Read back the sum of the sound data so far
+ *
+ * This data is provided to the sandbox driver by the sound play() method.
+ *
+ * @dev: Device to check
+ * @return sum of audio data
+ */
+int sandbox_get_sound_sum(struct udevice *dev);
+
 #endif