diff --git a/src/AudioAnalysisTools/Indices/IndexCalculate.cs b/src/AudioAnalysisTools/Indices/IndexCalculate.cs
index 29d85bd31..05986e77c 100644
--- a/src/AudioAnalysisTools/Indices/IndexCalculate.cs
+++ b/src/AudioAnalysisTools/Indices/IndexCalculate.cs
@@ -387,8 +387,6 @@ public static IndexCalculateResult Analysis(
             deciBelSpectrogram = SNR.RemoveNeighbourhoodBackgroundNoise(deciBelSpectrogram, nhThreshold: 2.0);
 
             // iii: CALCULATE noise reduced AVERAGE DECIBEL SPECTRUM
-            // TODO: The method to calculate POW by averaging decibel values should be depracated. It is now replaced by index PMN.
-            spectralIndices.POW = SpectrogramTools.CalculateAvgSpectrumFromSpectrogram(deciBelSpectrogram);
             spectralIndices.PMN = SpectrogramTools.CalculateAvgDecibelSpectrumFromSpectrogram(deciBelSpectrogram);
 
             // iv: CALCULATE SPECTRAL COVER.
diff --git a/tests/Acoustics.Test/AudioAnalysisTools/Indices/IndexCalculateTest.cs b/tests/Acoustics.Test/AudioAnalysisTools/Indices/IndexCalculateTest.cs
index 7fad23be8..611fd1921 100644
--- a/tests/Acoustics.Test/AudioAnalysisTools/Indices/IndexCalculateTest.cs
+++ b/tests/Acoustics.Test/AudioAnalysisTools/Indices/IndexCalculateTest.cs
@@ -1,4 +1,4 @@
-// <copyright file="IndexCalculateTest.cs" company="QutEcoacoustics">
+// <copyright file="IndexCalculateTest.cs" company="QutEcoacoustics">
 // All code in this file and all associated files are the copyright and property of the QUT Ecoacoustics Research Group (formerly MQUTeR, and formerly QUT Bioacoustics Research Group).
 // </copyright>
 
@@ -183,13 +183,6 @@ public void TestOfSpectralIndices()
             expectedVector = Binary.Deserialize<double[]>(expectedSpectrumFile);
             CollectionAssert.That.AreEqual(expectedVector, spectralIndices.EVN, AllowedDelta);
 
-            // POW
-            expectedSpectrumFile = new FileInfo(resourcesDir + "\\POW.bin");
-
-            // Binary.Serialize(expectedSpectrumFile, spectralIndices.POW);
-            expectedVector = Binary.Deserialize<double[]>(expectedSpectrumFile);
-            CollectionAssert.That.AreEqual(expectedVector, spectralIndices.POW, AllowedDelta);
-
             // RHZ
             expectedSpectrumFile = new FileInfo(resourcesDir + "\\RHZ.bin");
 
diff --git a/tests/Acoustics.Test/AudioAnalysisTools/LongDurationSpectrograms/Zooming/ZoomCommonTests.cs b/tests/Acoustics.Test/AudioAnalysisTools/LongDurationSpectrograms/Zooming/ZoomCommonTests.cs
index f5c378a32..d8c9f8e61 100644
--- a/tests/Acoustics.Test/AudioAnalysisTools/LongDurationSpectrograms/Zooming/ZoomCommonTests.cs
+++ b/tests/Acoustics.Test/AudioAnalysisTools/LongDurationSpectrograms/Zooming/ZoomCommonTests.cs
@@ -74,7 +74,7 @@ public void TestImagesHaveCorrectLength(double renderScale, int expectedWidth)
             // create some fake spectra
             int duration = (int)(recordingDuration.TotalSeconds / dataScale.TotalSeconds);
             var spectra = new Dictionary<string, double[,]>();
-            foreach (var key in SpectralIndexValues.GetKeys())
+            foreach (var key in SpectralIndexValues.Keys)
             {
                 spectra.Add(key, new double[256, duration]);
                 var bgnKey = nameof(SpectralIndexValues.BGN);