diff --git a/test/Microsoft.AspNet.Hosting.Tests/HostingEngineTests.cs b/test/Microsoft.AspNet.Hosting.Tests/HostingEngineTests.cs
index 2017193a16..13921ba022 100644
--- a/test/Microsoft.AspNet.Hosting.Tests/HostingEngineTests.cs
+++ b/test/Microsoft.AspNet.Hosting.Tests/HostingEngineTests.cs
@@ -466,7 +466,7 @@ namespace Microsoft.AspNet.Hosting
                 var env = engine.ApplicationServices.GetRequiredService<IHostingEnvironment>();
                 // MapPath requires webroot to be set, we don't care
                 // about file provider so  just set it here
-                env.WebRootPath = "";
+                env.WebRootPath = ".";
                 var mappedPath = env.MapPath(virtualPath);
                 expectedSuffix = expectedSuffix.Replace('/', Path.DirectorySeparatorChar);
                 Assert.Equal(Path.Combine(env.WebRootPath, expectedSuffix), mappedPath);