diff --git a/src/libraries/System.Net.Sockets/tests/FunctionalTests/LoggingTest.cs b/src/libraries/System.Net.Sockets/tests/FunctionalTests/LoggingTest.cs
index b2c993af9c7857..a92e7aee692bbd 100644
--- a/src/libraries/System.Net.Sockets/tests/FunctionalTests/LoggingTest.cs
+++ b/src/libraries/System.Net.Sockets/tests/FunctionalTests/LoggingTest.cs
@@ -57,7 +57,7 @@ public void EventSource_EventsRaisedAsExpected()
                         new SendReceiveApm(null).SendRecv_Stream_TCP(IPAddress.Loopback, false).GetAwaiter();
                         new SendReceiveApm(null).SendRecv_Stream_TCP(IPAddress.Loopback, true).GetAwaiter();
 
-                        new NetworkStreamTest().CopyToAsync_AllDataCopied(4096).GetAwaiter().GetResult();
+                        new NetworkStreamTest().CopyToAsync_AllDataCopied(4096, true).GetAwaiter().GetResult();
                         new NetworkStreamTest().Timeout_ValidData_Roundtrips().GetAwaiter().GetResult();
                     });
                     Assert.DoesNotContain(events, ev => ev.EventId == 0); // errors from the EventSource itself
diff --git a/src/libraries/System.Net.Sockets/tests/FunctionalTests/NetworkStreamTest.cs b/src/libraries/System.Net.Sockets/tests/FunctionalTests/NetworkStreamTest.cs
index 84c5c5faf447d2..a834af0bece681 100644
--- a/src/libraries/System.Net.Sockets/tests/FunctionalTests/NetworkStreamTest.cs
+++ b/src/libraries/System.Net.Sockets/tests/FunctionalTests/NetworkStreamTest.cs
@@ -634,14 +634,14 @@ await RunWithConnectedNetworkStreamsAsync((server, client) =>
             });
         }
 
+        public static IEnumerable<object[]> CopyToAsync_AllDataCopied_MemberData() =>
+            from asyncWrite in new bool[] { true, false }
+            from byteCount in new int[] { 0, 1, 1024, 4096, 4095, 1024 * 1024 }
+            select new object[] { byteCount, asyncWrite };
+
         [Theory]
-        [InlineData(0)]
-        [InlineData(1)]
-        [InlineData(1024)]
-        [InlineData(4096)]
-        [InlineData(4095)]
-        [InlineData(1024*1024)]
-        public async Task CopyToAsync_AllDataCopied(int byteCount)
+        [MemberData(nameof(CopyToAsync_AllDataCopied_MemberData))]
+        public async Task CopyToAsync_AllDataCopied(int byteCount, bool asyncWrite)
         {
             await RunWithConnectedNetworkStreamsAsync(async (server, client) =>
             {
@@ -650,7 +650,16 @@ await RunWithConnectedNetworkStreamsAsync(async (server, client) =>
                 new Random().NextBytes(dataToCopy);
 
                 Task copyTask = client.CopyToAsync(results);
-                await server.WriteAsync(dataToCopy, 0, dataToCopy.Length);
+
+                if (asyncWrite)
+                {
+                    await server.WriteAsync(dataToCopy, 0, dataToCopy.Length);
+                }
+                else
+                {
+                    server.Write(new ReadOnlySpan<byte>(dataToCopy, 0, dataToCopy.Length));
+                }
+
                 server.Dispose();
                 await copyTask;