diff --git a/tests/unit/test_function.py b/tests/unit/test_function.py
index 776bf7530..e138862c0 100644
--- a/tests/unit/test_function.py
+++ b/tests/unit/test_function.py
@@ -884,7 +884,7 @@ def test_short_time_fft(
         assert f.get_extrapolation_method() == "zero"
 
         frequencies = f.source[:, 0]
-        amplitudes = f.source[:, 1]
+        # amplitudes = f.source[:, 1]
 
         if only_positive:
             assert np.all(frequencies >= 0)