diff --git a/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.Proxy.cs b/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.Proxy.cs
index d3e00ce0327b0..bb664f9129856 100644
--- a/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.Proxy.cs
+++ b/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.Proxy.cs
@@ -300,7 +300,11 @@ public async Task AuthenticatedProxyTunnelRequest_PostAsyncWithNoCreds_Throws()
                 using (HttpClient client = CreateHttpClient(handler))
                 {
                     HttpRequestException e = await Assert.ThrowsAnyAsync<HttpRequestException>(async () => await client.PostAsync("https://nosuchhost.invalid", new StringContent(content)));
-                    Assert.Contains("407", e.Message);
+                    Assert.Contains(((int)HttpStatusCode.ProxyAuthenticationRequired).ToString(), e.Message);
+#if !WINHTTPHANDLER_TEST
+                    Assert.Equal(HttpStatusCode.ProxyAuthenticationRequired, e.StatusCode);
+                    Assert.Equal(HttpRequestError.ProxyTunnelError, e.HttpRequestError);
+#endif
                 }
             }
         }
@@ -313,7 +317,11 @@ public async Task Proxy_SslProxyUnsupported_Throws()
             {
                 handler.Proxy = new WebProxy($"https://{Guid.NewGuid():N}");
 
-                await Assert.ThrowsAsync<HttpRequestException>(() => client.GetAsync($"http://{Guid.NewGuid():N}"));
+                HttpRequestException e = await Assert.ThrowsAsync<HttpRequestException>(() => client.GetAsync($"http://{Guid.NewGuid():N}"));
+#if !WINHTTPHANDLER_TEST
+                Assert.Null(e.StatusCode);
+                Assert.Equal(HttpRequestError.ProxyTunnelError, e.HttpRequestError);
+#endif
             }
         }
 
diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs b/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs
index 4770b49203624..3c91fc4ccde43 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs
@@ -794,7 +794,7 @@ private async ValueTask<Stream> EstablishProxyTunnelAsync(bool async, Cancellati
             if (tunnelResponse.StatusCode != HttpStatusCode.OK)
             {
                 tunnelResponse.Dispose();
-                throw new HttpRequestException(HttpRequestError.ProxyTunnelError, SR.Format(SR.net_http_proxy_tunnel_returned_failure_status_code, _proxyUri, (int)tunnelResponse.StatusCode));
+                throw new HttpRequestException(HttpRequestError.ProxyTunnelError, SR.Format(SR.net_http_proxy_tunnel_returned_failure_status_code, _proxyUri, (int)tunnelResponse.StatusCode), statusCode: tunnelResponse.StatusCode);
             }
 
             try