diff --git a/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/AssemblyInfo.cs b/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/AssemblyInfo.cs
new file mode 100644
index 00000000000000..85b21b953764df
--- /dev/null
+++ b/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/AssemblyInfo.cs
@@ -0,0 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Xunit;
+
+[assembly: SkipOnMono("System.Diagnostics.FileVersionInfo is not supported on wasm.", TestPlatforms.Browser)]
diff --git a/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/System.Diagnostics.FileVersionInfo.Tests.csproj b/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/System.Diagnostics.FileVersionInfo.Tests.csproj
index dfc86e5297966e..ad26918fd6eaff 100644
--- a/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/System.Diagnostics.FileVersionInfo.Tests.csproj
+++ b/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/System.Diagnostics.FileVersionInfo.Tests.csproj
@@ -2,6 +2,7 @@
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent)-Windows_NT;$(NetCoreAppCurrent)-Unix;$(NetCoreAppCurrent)-Browser</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <IgnoreForCI Condition="'$(TargetOS)' == 'Browser'">true</IgnoreForCI>
   </PropertyGroup>
   <ItemGroup>
     <!-- Checked in test binaries for FileVersionInfoTest -->
@@ -20,6 +21,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="FileVersionInfoTest.cs" />
+    <Compile Include="AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetsWindows)' == 'true'">
     <Compile Include="FileVersionInfoTest.Windows.cs" />
@@ -28,7 +30,7 @@
     <Compile Include="$(CommonPath)Interop\Windows\Kernel32\Interop.VerLanguageName.cs"
              Link="ProductionCode\Common\Interop\Windows\Kernel32\Interop.VerLanguageName.cs" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetsUnix)' == 'true'">
+  <ItemGroup Condition="'$(TargetsUnix)' == 'true' or '$(TargetsBrowser)' == 'true'">
     <Compile Include="FileVersionInfoTest.Unix.cs" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/libraries/System.Diagnostics.Process/tests/XunitAssemblyAttributes.cs b/src/libraries/System.Diagnostics.Process/tests/AssemblyInfo.cs
similarity index 77%
rename from src/libraries/System.Diagnostics.Process/tests/XunitAssemblyAttributes.cs
rename to src/libraries/System.Diagnostics.Process/tests/AssemblyInfo.cs
index f025a31cce4e48..ae8def55d925a3 100644
--- a/src/libraries/System.Diagnostics.Process/tests/XunitAssemblyAttributes.cs
+++ b/src/libraries/System.Diagnostics.Process/tests/AssemblyInfo.cs
@@ -6,3 +6,5 @@
 // Process tests can conflict with each other, as they modify ambient state
 // like the console code page and environment variables
 [assembly: CollectionBehavior(CollectionBehavior.CollectionPerAssembly)]
+
+[assembly: SkipOnMono("System.Diagnostics.Process is not supported on wasm.", TestPlatforms.Browser)]
diff --git a/src/libraries/System.Diagnostics.Process/tests/System.Diagnostics.Process.Tests.csproj b/src/libraries/System.Diagnostics.Process/tests/System.Diagnostics.Process.Tests.csproj
index da4069eb05bf3a..83b129811ed289 100644
--- a/src/libraries/System.Diagnostics.Process/tests/System.Diagnostics.Process.Tests.csproj
+++ b/src/libraries/System.Diagnostics.Process/tests/System.Diagnostics.Process.Tests.csproj
@@ -4,6 +4,7 @@
     <DefineConstants Condition="'$(TargetsWindows)' == 'true'">$(DefineConstants);TargetsWindows</DefineConstants>
     <IncludeRemoteExecutor>true</IncludeRemoteExecutor>
     <TargetFrameworks>$(NetCoreAppCurrent)-Windows_NT;$(NetCoreAppCurrent)-Unix;$(NetCoreAppCurrent)-Browser</TargetFrameworks>
+    <IgnoreForCI Condition="'$(TargetOS)' == 'Browser'">true</IgnoreForCI>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="$(CoreLibSharedDir)System\PasteArguments.cs"
@@ -29,7 +30,7 @@
     <Compile Include="ProcessThreadTests.cs" />
     <Compile Include="ProcessWaitingTests.cs" />
     <Compile Include="RemotelyInvokable.cs" />
-    <Compile Include="XunitAssemblyAttributes.cs" />
+    <Compile Include="AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetsWindows)' == 'true'">
     <Compile Include="ProcessTests.Windows.cs" />
@@ -37,7 +38,7 @@
     <Compile Include="$(CoreLibSharedDir)System\PasteArguments.Windows.cs"
              Link="System\PasteArguments.Windows.cs" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetsUnix)' == 'true'">
+  <ItemGroup Condition="'$(TargetsUnix)' == 'true' or '$(TargetsBrowser)' == 'true'">
     <Compile Include="ProcessTests.Unix.cs" />
     <Compile Include="ProcessThreadTests.Unix.cs" />
     <Compile Include="$(CoreLibSharedDir)System\PasteArguments.Unix.cs"