diff --git a/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm.sln b/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm.sln
deleted file mode 100644
index ea767621516476..00000000000000
--- a/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm.sln
+++ /dev/null
@@ -1,50 +0,0 @@
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.0.0
-MinimumVisualStudioVersion = 16.0.0.0
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BlazorWebWasm", "BlazorWebWasm\BlazorWebWasm.csproj", "{79840C4C-980C-460C-AFDD-2663C233ED42}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BlazorWebWasm.Client", "BlazorWebWasm.Client\BlazorWebWasm.Client.csproj", "{CA65DE89-E642-4F21-8383-42B2899C8502}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Debug|x64 = Debug|x64
-		Debug|x86 = Debug|x86
-		Release|Any CPU = Release|Any CPU
-		Release|x64 = Release|x64
-		Release|x86 = Release|x86
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Debug|x64.Build.0 = Debug|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Debug|x86.Build.0 = Debug|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Release|Any CPU.Build.0 = Release|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Release|x64.ActiveCfg = Release|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Release|x64.Build.0 = Release|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Release|x86.ActiveCfg = Release|Any CPU
-		{CA65DE89-E642-4F21-8383-42B2899C8502}.Release|x86.Build.0 = Release|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Debug|x64.Build.0 = Debug|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Debug|x86.Build.0 = Debug|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Release|Any CPU.Build.0 = Release|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Release|x64.ActiveCfg = Release|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Release|x64.Build.0 = Release|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Release|x86.ActiveCfg = Release|Any CPU
-		{79840C4C-980C-460C-AFDD-2663C233ED42}.Release|x86.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {60995319-A9DF-4E04-BC6E-828A27372E72}
-	EndGlobalSection
-EndGlobal
diff --git a/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm.slnx b/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm.slnx
new file mode 100644
index 00000000000000..afe8fc6d80c19e
--- /dev/null
+++ b/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm.slnx
@@ -0,0 +1,10 @@
+<Solution>
+  <Configurations>
+    <Platform Name="Any CPU" />
+    <Platform Name="wasm" />
+    <Platform Name="x64" />
+    <Platform Name="x86" />
+  </Configurations>
+  <Project Path="BlazorWebWasm.Client/BlazorWebWasm.Client.csproj" />
+  <Project Path="BlazorWebWasm/BlazorWebWasm.csproj" />
+</Solution>