diff --git a/audio_visualizer/tests/data/test_sensor_data.csv b/audio_visualizer/tests/data/test_sensor_data.csv
new file mode 100644
index 0000000..bb85c01
--- /dev/null
+++ b/audio_visualizer/tests/data/test_sensor_data.csv
@@ -0,0 +1,11 @@
+timestamp,frequency,amplitude
+0.00,20.0,0.05
+0.10,50.0,0.20
+0.20,150.0,0.35
+0.30,300.0,0.45
+0.40,600.0,0.60
+0.50,1200.0,0.58
+0.60,2400.0,0.40
+0.70,4800.0,0.25
+0.80,9600.0,0.15
+0.90,19200.0,0.10
\ No newline at end of file