diff --git a/test/EFCore.InMemory.FunctionalTests/EFCore.InMemory.FunctionalTests.csproj b/test/EFCore.InMemory.FunctionalTests/EFCore.InMemory.FunctionalTests.csproj
index 96a47d39250..b630896bc90 100644
--- a/test/EFCore.InMemory.FunctionalTests/EFCore.InMemory.FunctionalTests.csproj
+++ b/test/EFCore.InMemory.FunctionalTests/EFCore.InMemory.FunctionalTests.csproj
@@ -21,6 +21,7 @@
 
   <ItemGroup>
     <Compile Include="..\..\src\Shared\MemberInfoExtensions.cs" Link="MemberInfoExtensions.cs" />
+    <Compile Include="..\Shared\ModuleInitializer.cs" Link="ModuleInitializer.cs" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/test/EFCore.SqlServer.FunctionalTests/EFCore.SqlServer.FunctionalTests.csproj b/test/EFCore.SqlServer.FunctionalTests/EFCore.SqlServer.FunctionalTests.csproj
index 5ed63c0a1cd..020c87cf152 100644
--- a/test/EFCore.SqlServer.FunctionalTests/EFCore.SqlServer.FunctionalTests.csproj
+++ b/test/EFCore.SqlServer.FunctionalTests/EFCore.SqlServer.FunctionalTests.csproj
@@ -17,6 +17,10 @@
     <None Include="Scaffolding\Baselines\**\*" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Compile Include="..\Shared\ModuleInitializer.cs" Link="ModuleInitializer.cs" />
+  </ItemGroup>
+
   <ItemGroup>
     <Using Include="System.Data.Common" />
     <Using Include="System.Diagnostics" />
diff --git a/test/EFCore.Sqlite.FunctionalTests/EFCore.Sqlite.FunctionalTests.csproj b/test/EFCore.Sqlite.FunctionalTests/EFCore.Sqlite.FunctionalTests.csproj
index 49f7e3dbfc8..262fe3a73fe 100644
--- a/test/EFCore.Sqlite.FunctionalTests/EFCore.Sqlite.FunctionalTests.csproj
+++ b/test/EFCore.Sqlite.FunctionalTests/EFCore.Sqlite.FunctionalTests.csproj
@@ -16,6 +16,10 @@
     <None Include="Scaffolding\Baselines\**\*" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Compile Include="..\Shared\ModuleInitializer.cs" Link="ModuleInitializer.cs" />
+  </ItemGroup>
+
   <ItemGroup>
     <Using Include="System.Data.Common" />
     <Using Include="System.Diagnostics" />
diff --git a/test/EFCore.Tests/EFCore.Tests.csproj b/test/EFCore.Tests/EFCore.Tests.csproj
index a2366cf47f5..f81c6d6cc98 100644
--- a/test/EFCore.Tests/EFCore.Tests.csproj
+++ b/test/EFCore.Tests/EFCore.Tests.csproj
@@ -42,6 +42,10 @@
     </AssemblyAttribute>
   </ItemGroup>
 
+  <ItemGroup>
+    <Compile Include="..\Shared\ModuleInitializer.cs" Link="ModuleInitializer.cs" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\EFCore.InMemory.FunctionalTests\EFCore.InMemory.FunctionalTests.csproj" />
     <ProjectReference Include="..\EFCore.Specification.Tests\EFCore.Specification.Tests.csproj" />
diff --git a/test/Shared/ModuleInitializer.cs b/test/Shared/ModuleInitializer.cs
new file mode 100644
index 00000000000..40dddc20a95
--- /dev/null
+++ b/test/Shared/ModuleInitializer.cs
@@ -0,0 +1,23 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Globalization;
+using System.Runtime.CompilerServices;
+
+internal static class ModuleInitializer
+{
+    [ModuleInitializer]
+    internal static void Initialize()
+    {
+        InitializeLocale();
+    }
+
+    private static void InitializeLocale()
+    {
+        var culture = new CultureInfo("en-US");
+        CultureInfo.DefaultThreadCurrentCulture = culture;
+        CultureInfo.DefaultThreadCurrentUICulture = culture;
+        Thread.CurrentThread.CurrentCulture = culture;
+        Thread.CurrentThread.CurrentUICulture = culture;
+    }
+}