diff --git a/tests/Acoustics.Test/AudioAnalysisTools/Indices/IndexCalculateTest.cs b/tests/Acoustics.Test/AudioAnalysisTools/Indices/IndexCalculateTest.cs
index 6a6f29f8d..db0ca088f 100644
--- a/tests/Acoustics.Test/AudioAnalysisTools/Indices/IndexCalculateTest.cs
+++ b/tests/Acoustics.Test/AudioAnalysisTools/Indices/IndexCalculateTest.cs
@@ -140,7 +140,7 @@ public void TestOfSpectralIndices()
             // ACI
             var expectedSpectrumFile = new FileInfo(resourcesDir + "\\ACI.bin");
 
-            // Binary.Serialize(expectedSpectrumFile, spectralIndices.ACI);
+            //Binary.Serialize(expectedSpectrumFile, spectralIndices.ACI);
             var expectedVector = Binary.Deserialize<double[]>(expectedSpectrumFile);
             CollectionAssert.That.AreEqual(expectedVector, spectralIndices.ACI, AllowedDelta);
 
diff --git a/tests/Fixtures/Indices/ACI.bin b/tests/Fixtures/Indices/ACI.bin
index fd57821f5..02395d082 100644
--- a/tests/Fixtures/Indices/ACI.bin
+++ b/tests/Fixtures/Indices/ACI.bin
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:51867bb43984592080a94dece892987029a9d8023de258a126ff11ba177b4bf3
+oid sha256:154506500119ecc9781eaef8b2530e1dbce32f5ebdbad951a3491df8fea0da54
 size 2076