diff --git a/FastRngTests/Double/FrequencyAnalysis.cs b/FastRngTests/Double/FrequencyAnalysis.cs
index 57ecf38..7f161dc 100644
--- a/FastRngTests/Double/FrequencyAnalysis.cs
+++ b/FastRngTests/Double/FrequencyAnalysis.cs
@@ -1,10 +1,12 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Text;
 
 namespace FastRngTests.Double
 {
+    [ExcludeFromCodeCoverage]
     public sealed class FrequencyAnalysis
     {
         private readonly uint[] data;
diff --git a/FastRngTests/Double/RunningStatistics.cs b/FastRngTests/Double/RunningStatistics.cs
index 4558a11..4a6141d 100644
--- a/FastRngTests/Double/RunningStatistics.cs
+++ b/FastRngTests/Double/RunningStatistics.cs
@@ -1,7 +1,9 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 
 namespace FastRngTests.Double
 {
+    [ExcludeFromCodeCoverage]
     internal sealed class RunningStatistics
     {
         private double previousM;
diff --git a/FastRngTests/Float/FrequencyAnalysis.cs b/FastRngTests/Float/FrequencyAnalysis.cs
index 7320c61..5166275 100644
--- a/FastRngTests/Float/FrequencyAnalysis.cs
+++ b/FastRngTests/Float/FrequencyAnalysis.cs
@@ -1,9 +1,11 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Text;
 
 namespace FastRngTests.Float
 {
+    [ExcludeFromCodeCoverage]
     public sealed class FrequencyAnalysis
     {
         private readonly uint[] data;
diff --git a/FastRngTests/Float/RunningStatistics.cs b/FastRngTests/Float/RunningStatistics.cs
index 41a2f4c..13be97e 100644
--- a/FastRngTests/Float/RunningStatistics.cs
+++ b/FastRngTests/Float/RunningStatistics.cs
@@ -1,7 +1,9 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 
 namespace FastRngTests.Float
 {
+    [ExcludeFromCodeCoverage]
     internal sealed class RunningStatistics
     {
         private float previousM;