diff --git a/src/Components/WebAssembly/WebAssembly.Authentication/test/Microsoft.AspNetCore.Components.WebAssembly.Authentication.Tests.csproj b/src/Components/WebAssembly/WebAssembly.Authentication/test/Microsoft.AspNetCore.Components.WebAssembly.Authentication.Tests.csproj
index 3db1f78b51a0..576eb988427f 100644
--- a/src/Components/WebAssembly/WebAssembly.Authentication/test/Microsoft.AspNetCore.Components.WebAssembly.Authentication.Tests.csproj
+++ b/src/Components/WebAssembly/WebAssembly.Authentication/test/Microsoft.AspNetCore.Components.WebAssembly.Authentication.Tests.csproj
@@ -9,6 +9,7 @@
     <Reference Include="Microsoft.AspNetCore.Components.WebAssembly" />
     <Reference Include="Microsoft.AspNetCore.Components.WebAssembly.Authentication" />
     <Reference Include="Microsoft.CodeAnalysis.CSharp" />
+    <Reference Include="System.Text.Json" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Components/WebAssembly/WebAssembly/test/Microsoft.AspNetCore.Components.WebAssembly.Tests.csproj b/src/Components/WebAssembly/WebAssembly/test/Microsoft.AspNetCore.Components.WebAssembly.Tests.csproj
index 2f9ac20c7c09..e5a906e46f4e 100644
--- a/src/Components/WebAssembly/WebAssembly/test/Microsoft.AspNetCore.Components.WebAssembly.Tests.csproj
+++ b/src/Components/WebAssembly/WebAssembly/test/Microsoft.AspNetCore.Components.WebAssembly.Tests.csproj
@@ -7,6 +7,7 @@
   <ItemGroup>
     <Reference Include="Microsoft.AspNetCore.Components.WebAssembly" />
     <Reference Include="Microsoft.CodeAnalysis.CSharp" />
+    <Reference Include="System.Text.Json" />
   </ItemGroup>
 
 </Project>