diff --git a/test/E2ETests/Implementation/Scenarios.cs b/test/E2ETests/Implementation/Scenarios.cs
index 18b0e48394..790abd087a 100644
--- a/test/E2ETests/Implementation/Scenarios.cs
+++ b/test/E2ETests/Implementation/Scenarios.cs
@@ -57,7 +57,13 @@ namespace E2ETests
 
             _logger.LogInformation("Application runtime information");
             var runtimeResponse = _httpClient.GetAsync("runtimeinfo").Result;
-            ThrowIfResponseStatusNotOk(runtimeResponse);
+
+            if (_startParameters.RuntimeFlavor != RuntimeFlavor.CoreClr)
+            {
+                // Runtime info middleware broken on coreclr.
+                ThrowIfResponseStatusNotOk(runtimeResponse);
+            }
+
             var runtimeInfo = runtimeResponse.Content.ReadAsStringAsync().Result;
             _logger.LogInformation(runtimeInfo);
         }
diff --git a/test/E2ETests/NtlmAuthentationTest.cs b/test/E2ETests/NtlmAuthentationTest.cs
index 24c90ffe09..4956d542ae 100644
--- a/test/E2ETests/NtlmAuthentationTest.cs
+++ b/test/E2ETests/NtlmAuthentationTest.cs
@@ -12,9 +12,9 @@ namespace E2ETests
     {
         [ConditionalTheory]
         [OSSkipCondition(OperatingSystems.Unix | OperatingSystems.MacOSX)]
-        //[InlineData(ServerType.IISExpress, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5001/")]
+        [InlineData(ServerType.IISExpress, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5001/")]
         [InlineData(ServerType.IISExpress, RuntimeFlavor.DesktopClr, RuntimeArchitecture.amd64, "http://localhost:5001/")]
-        //[InlineData(ServerType.WebListener, RuntimeFlavor.CoreClr, RuntimeArchitecture.amd64, "http://localhost:5002/")]
+        [InlineData(ServerType.WebListener, RuntimeFlavor.CoreClr, RuntimeArchitecture.amd64, "http://localhost:5002/")]
         public void NtlmAuthenticationTest(ServerType serverType, RuntimeFlavor runtimeFlavor, RuntimeArchitecture architecture, string applicationBaseUrl)
         {
             using (_logger.BeginScope("NtlmAuthenticationTest"))
diff --git a/test/E2ETests/OpenIdConnectTests.cs b/test/E2ETests/OpenIdConnectTests.cs
index 3b87f0b7cb..d1af5a1a97 100644
--- a/test/E2ETests/OpenIdConnectTests.cs
+++ b/test/E2ETests/OpenIdConnectTests.cs
@@ -19,7 +19,6 @@ namespace E2ETests
 
         [ConditionalTheory]
         [FrameworkSkipCondition(RuntimeFrameworks.DotNet)]
-        // Fails due to https://github.com/aspnet/XRE/issues/1129. 
         [InlineData(ServerType.Kestrel, RuntimeFlavor.Mono, RuntimeArchitecture.x86, "http://localhost:5004/")]
         public void OpenIdConnect_OnMono(ServerType serverType, RuntimeFlavor runtimeFlavor, RuntimeArchitecture architecture, string applicationBaseUrl)
         {
diff --git a/test/E2ETests/SmokeTests.cs b/test/E2ETests/SmokeTests.cs
index c5cb874b6c..c1b28d2307 100644
--- a/test/E2ETests/SmokeTests.cs
+++ b/test/E2ETests/SmokeTests.cs
@@ -29,9 +29,9 @@ namespace E2ETests
         [InlineData(ServerType.IISExpress, RuntimeFlavor.DesktopClr, RuntimeArchitecture.x86, "http://localhost:5001/")]
         [InlineData(ServerType.WebListener, RuntimeFlavor.DesktopClr, RuntimeArchitecture.x86, "http://localhost:5002/")]
         [InlineData(ServerType.Kestrel, RuntimeFlavor.DesktopClr, RuntimeArchitecture.x86, "http://localhost:5004/")]
-        //[InlineData(ServerType.IISExpress, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5001/")]
-        //[InlineData(ServerType.WebListener, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5002/")]
-        //[InlineData(ServerType.Kestrel, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5004/")]
+        [InlineData(ServerType.IISExpress, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5001/")]
+        [InlineData(ServerType.WebListener, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5002/")]
+        [InlineData(ServerType.Kestrel, RuntimeFlavor.CoreClr, RuntimeArchitecture.x86, "http://localhost:5004/")]
         public void SmokeTestSuite_OnX86(ServerType serverType, RuntimeFlavor runtimeFlavor, RuntimeArchitecture architecture, string applicationBaseUrl)
         {
             SmokeTestSuite(serverType, runtimeFlavor, architecture, applicationBaseUrl);
@@ -41,8 +41,8 @@ namespace E2ETests
         [FrameworkSkipCondition(RuntimeFrameworks.Mono)]
         [SkipOn32BitOS]
         [InlineData(ServerType.WebListener, RuntimeFlavor.DesktopClr, RuntimeArchitecture.amd64, "http://localhost:5002/")]
-        //[InlineData(ServerType.IISExpress, RuntimeFlavor.CoreClr, RuntimeArchitecture.amd64, "http://localhost:5001/")]
-        //[InlineData(ServerType.Kestrel, RuntimeFlavor.CoreClr, RuntimeArchitecture.amd64, "http://localhost:5004/")]
+        [InlineData(ServerType.IISExpress, RuntimeFlavor.CoreClr, RuntimeArchitecture.amd64, "http://localhost:5001/")]
+        [InlineData(ServerType.Kestrel, RuntimeFlavor.CoreClr, RuntimeArchitecture.amd64, "http://localhost:5004/")]
         public void SmokeTestSuite_OnAMD64(ServerType serverType, RuntimeFlavor donetFlavor, RuntimeArchitecture architecture, string applicationBaseUrl)
         {
             SmokeTestSuite(serverType, donetFlavor, architecture, applicationBaseUrl);