diff --git a/tests/FSharp.Data.Core.Tests/Http.fs b/tests/FSharp.Data.Core.Tests/Http.fs
index be30f8891..dc41d1dce 100644
--- a/tests/FSharp.Data.Core.Tests/Http.fs
+++ b/tests/FSharp.Data.Core.Tests/Http.fs
@@ -57,7 +57,7 @@ let startHttpLocalServer() =
                 port <- random.Next(10000, 65000)
         port
 
-    let baseAddress = $"http://localhost:{freePort}"
+    let baseAddress = $"http://127.0.0.1:{freePort}"
 
     let workerTask = app.RunAsync(baseAddress)
     printfn $"Started local http server with address {baseAddress}"
diff --git a/tests/FSharp.Data.Core.Tests/XmlExtensions.fs b/tests/FSharp.Data.Core.Tests/XmlExtensions.fs
index 9182d6cde..4520a060a 100644
--- a/tests/FSharp.Data.Core.Tests/XmlExtensions.fs
+++ b/tests/FSharp.Data.Core.Tests/XmlExtensions.fs
@@ -60,7 +60,7 @@ let startXmlHttpLocalServer() =
                 port <- random.Next(10000, 65000)
         port
 
-    let baseAddress = $"http://localhost:{freePort}"
+    let baseAddress = $"http://127.0.0.1:{freePort}"
     let workerTask = app.RunAsync(baseAddress)
 
     { new ITestHttpServer with