diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection.ts
index fcc76ce879..795ce730d7 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection.ts
@@ -173,6 +173,10 @@ export class HttpConnection implements IConnection {
             ? `${window.document.location.protocol}//${(parser.host || window.document.location.host)}`
             : `${parser.protocol}//${parser.host}`;
 
+        if (!url || url[0] != '/') {
+            url = '/' + url;
+        }
+
         let normalizedUrl = baseUrl + url;
         this.logger.log(LogLevel.Information, `Normalizing '${url}' to '${normalizedUrl}'`);
         return normalizedUrl;
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/Properties/launchSettings.json b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/Properties/launchSettings.json
new file mode 100644
index 0000000000..83318595ad
--- /dev/null
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/Properties/launchSettings.json
@@ -0,0 +1,27 @@
+{
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:60249/",
+      "sslPort": 0
+    }
+  },
+  "profiles": {
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "Microsoft.AspNetCore.SignalR.Test.Server": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "applicationUrl": "http://localhost:5000/"
+    }
+  }
+}
\ No newline at end of file
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/connectionTests.js b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/connectionTests.js
index 1f3ee9574b..80df786ab4 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/connectionTests.js
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/connectionTests.js
@@ -34,7 +34,9 @@ describe('connection', function () {
     eachTransport(function (transportType) {
         it("over " + signalR.TransportType[transportType] + " can send and receive messages", function (done) {
             var message = "Hello World!";
-            var connection = new signalR.HttpConnection(ECHOENDPOINT_URL, {
+            // the url should be resolved relative to the document.location.host
+            // and the leading '/' should be automatically added to the url
+            var connection = new signalR.HttpConnection("echo", {
                 transport: transportType,
                 logging: signalR.LogLevel.Trace
             });