diff --git a/src/libraries/System.Configuration.ConfigurationManager/tests/AssemblyInfo.cs b/src/libraries/System.Configuration.ConfigurationManager/tests/AssemblyInfo.cs
new file mode 100644
index 00000000000000..d76d58df7cf8c4
--- /dev/null
+++ b/src/libraries/System.Configuration.ConfigurationManager/tests/AssemblyInfo.cs
@@ -0,0 +1,8 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using Xunit;
+
+[assembly: SkipOnMono("System.Configuration.ConfigurationManager is not supported on WASM", TestPlatforms.Browser)]
\ No newline at end of file
diff --git a/src/libraries/System.Configuration.ConfigurationManager/tests/System.Configuration.ConfigurationManager.Tests.csproj b/src/libraries/System.Configuration.ConfigurationManager/tests/System.Configuration.ConfigurationManager.Tests.csproj
index 77b8fba4c8c275..e4572e3663fcc8 100644
--- a/src/libraries/System.Configuration.ConfigurationManager/tests/System.Configuration.ConfigurationManager.Tests.csproj
+++ b/src/libraries/System.Configuration.ConfigurationManager/tests/System.Configuration.ConfigurationManager.Tests.csproj
@@ -23,6 +23,7 @@
Link="Source\UrlPath.cs" />
+
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index f5b47857a2c20a..c2a935473b8b31 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -22,7 +22,6 @@
-