diff --git a/src/Servers/Kestrel/perf/PlatformBenchmarks/AsciiString.cs b/src/Servers/Kestrel/perf/PlatformBenchmarks/AsciiString.cs
index ef2a32d615..2b16c54e42 100644
--- a/src/Servers/Kestrel/perf/PlatformBenchmarks/AsciiString.cs
+++ b/src/Servers/Kestrel/perf/PlatformBenchmarks/AsciiString.cs
@@ -3,7 +3,6 @@
 
 using System;
 using System.Text;
-using Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure;
 
 namespace PlatformBenchmarks
 {
@@ -22,7 +21,7 @@ namespace PlatformBenchmarks
 
         public static implicit operator AsciiString(string str) => new AsciiString(str);
 
-        public override string ToString() => HttpUtilities.GetAsciiStringNonNullCharacters(_data);
+        public override string ToString() => Encoding.ASCII.GetString(_data);
         public static explicit operator string(AsciiString str) => str.ToString();
 
         public bool Equals(AsciiString other) => ReferenceEquals(_data, other._data) || SequenceEqual(_data, other._data);
diff --git a/src/Servers/Kestrel/perf/PlatformBenchmarks/BenchmarkConfigurationHelpers.cs b/src/Servers/Kestrel/perf/PlatformBenchmarks/BenchmarkConfigurationHelpers.cs
index 8f8f78105d..37a45db13b 100644
--- a/src/Servers/Kestrel/perf/PlatformBenchmarks/BenchmarkConfigurationHelpers.cs
+++ b/src/Servers/Kestrel/perf/PlatformBenchmarks/BenchmarkConfigurationHelpers.cs
@@ -4,8 +4,7 @@
 using System;
 using System.Net;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.Http.Internal;
-using Microsoft.AspNetCore.Server.Kestrel.Core;
+using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Configuration;
 
 namespace PlatformBenchmarks
diff --git a/src/Servers/Kestrel/perf/PlatformBenchmarks/DateHeader.cs b/src/Servers/Kestrel/perf/PlatformBenchmarks/DateHeader.cs
index bbc7d7daaa..47415305b2 100644
--- a/src/Servers/Kestrel/perf/PlatformBenchmarks/DateHeader.cs
+++ b/src/Servers/Kestrel/perf/PlatformBenchmarks/DateHeader.cs
@@ -7,7 +7,7 @@ using System.Diagnostics;
 using System.Text;
 using System.Threading;
 
-namespace Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http
+namespace PlatformBenchmarks
 {
     /// <summary>
     /// Manages the generation of the date header value.
diff --git a/src/Servers/Kestrel/perf/PlatformBenchmarks/Program.cs b/src/Servers/Kestrel/perf/PlatformBenchmarks/Program.cs
index 6b801e15f3..784af36c2b 100644
--- a/src/Servers/Kestrel/perf/PlatformBenchmarks/Program.cs
+++ b/src/Servers/Kestrel/perf/PlatformBenchmarks/Program.cs
@@ -4,7 +4,6 @@
 using System;
 using System.Net;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http;
 using Microsoft.Extensions.Configuration;
 
 namespace PlatformBenchmarks