diff --git a/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs b/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs
index b8097a43a6c6da..6ce1540fba5996 100644
--- a/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs
+++ b/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs
@@ -216,7 +216,7 @@ public async Task WaitForAvailableBidirectionStreamsAsyncWorks()
         public async Task SetListenerTimeoutWorksWithSmallTimeout()
         {
             var quicOptions = new QuicListenerOptions();
-            quicOptions.IdleTimeout = TimeSpan.FromSeconds(10);
+            quicOptions.IdleTimeout = TimeSpan.FromSeconds(1);
             quicOptions.ServerAuthenticationOptions = GetSslServerAuthenticationOptions();
             quicOptions.ListenEndPoint = new IPEndPoint(IPAddress.Loopback, 0);
 
@@ -476,7 +476,7 @@ await RunClientServer(
                         byte[] buffer = new byte[data.Length];
                         int bytesRead = await ReadAll(stream, buffer);
                         Assert.Equal(data.Length, bytesRead);
-                        AssertArrayEqual(data, buffer);
+                        AssertExtensions.SequenceEqual(data, buffer);
 
                         for (int pos = 0; pos < data.Length; pos += writeSize)
                         {
@@ -499,7 +499,7 @@ await RunClientServer(
                         byte[] buffer = new byte[data.Length];
                         int bytesRead = await ReadAll(stream, buffer);
                         Assert.Equal(data.Length, bytesRead);
-                        AssertArrayEqual(data, buffer);
+                        AssertExtensions.SequenceEqual(data, buffer);
 
                         await stream.ShutdownCompleted();
                     }
diff --git a/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamTests.cs b/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamTests.cs
index 7b40903651824f..b21135000aca65 100644
--- a/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamTests.cs
+++ b/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamTests.cs
@@ -190,7 +190,7 @@ await RunClientServer(
                     byte[] buffer = new byte[data.Length];
                     int bytesRead = await ReadAll(stream, buffer);
                     Assert.Equal(data.Length, bytesRead);
-                    AssertArrayEqual(data, buffer);
+                    AssertExtensions.SequenceEqual(data, buffer);
 
                     for (int pos = 0; pos < data.Length; pos += writeSize)
                     {
@@ -213,7 +213,7 @@ await RunClientServer(
                     byte[] buffer = new byte[data.Length];
                     int bytesRead = await ReadAll(stream, buffer);
                     Assert.Equal(data.Length, bytesRead);
-                    AssertArrayEqual(data, buffer);
+                    AssertExtensions.SequenceEqual(data, buffer);
 
                     await stream.ShutdownCompleted();
                 }
@@ -391,7 +391,7 @@ await RunClientServer(
                     }
 
                     Assert.Equal(testBuffer.Length, totalBytesRead);
-                    AssertArrayEqual(testBuffer, receiveBuffer);
+                    AssertExtensions.SequenceEqual(testBuffer, receiveBuffer);
 
                     await serverStream.ShutdownCompleted();
                 });
diff --git a/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicTestBase.cs b/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicTestBase.cs
index 4d9ab4de6a3aa2..803b2d40705921 100644
--- a/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicTestBase.cs
+++ b/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicTestBase.cs
@@ -171,40 +171,6 @@ internal static async Task<int> WriteForever(QuicStream stream)
                 await stream.WriteAsync(buffer);
             }
         }
-
-        internal static void AssertArrayEqual(byte[] expected, byte[] actual)
-        {
-            for (int i = 0; i < expected.Length; ++i)
-            {
-                if (expected[i] == actual[i])
-                {
-                    continue;
-                }
-
-                var message = $"Wrong data starting from idx={i}\n" +
-                    $"Expected: {ToStringAroundIndex(expected, i)}\n" +
-                    $"Actual:   {ToStringAroundIndex(actual, i)}";
-
-                Assert.True(expected[i] == actual[i], message);
-            }
-        }
-
-        private static string ToStringAroundIndex(byte[] arr, int idx, int dl = 3, int dr = 7)
-        {
-            var sb = new StringBuilder(idx - (dl+1) >= 0 ? "[..., " : "[");
-
-            for (int i = idx - dl; i <= idx + dr; ++i)
-            {
-                if (i >= 0 && i < arr.Length)
-                {
-                    sb.Append($"{arr[i]}, ");
-                }
-            }
-
-            sb.Append(idx + (dr+1) < arr.Length ? "...]" : "]");
-
-            return sb.ToString();
-        }
     }
 
     public interface IQuicImplProviderFactory