diff --git a/Content.IntegrationTests/AssemblyInfo.cs b/Content.IntegrationTests/AssemblyInfo.cs
new file mode 100644
index 000000000000..76fc42f3a915
--- /dev/null
+++ b/Content.IntegrationTests/AssemblyInfo.cs
@@ -0,0 +1,8 @@
+[assembly: Parallelizable(ParallelScope.Children)]
+
+// I don't know why this parallelism limit was originally put here.
+// I *do* know that I tried removing it, and ran into the following .NET runtime problem:
+// https://github.com/dotnet/runtime/issues/107197
+// So we can't really parallelize integration tests harder either until the runtime fixes that,
+// *or* we fix serv3 to not spam expression trees.
+[assembly: LevelOfParallelism(3)]
diff --git a/Content.IntegrationTests/PoolManager.cs b/Content.IntegrationTests/PoolManager.cs
index 34ac4060ddc8..c7b8dcaee968 100644
--- a/Content.IntegrationTests/PoolManager.cs
+++ b/Content.IntegrationTests/PoolManager.cs
@@ -23,8 +23,6 @@
 using Robust.Shared.Timing;
 using Robust.UnitTesting;
 
-[assembly: LevelOfParallelism(3)]
-
 namespace Content.IntegrationTests;
 
 /// <summary>
diff --git a/Content.IntegrationTests/PoolManagerTestEventHandler.cs b/Content.IntegrationTests/PoolManagerTestEventHandler.cs
index 3b26d6637fdf..be4c746a60a2 100644
--- a/Content.IntegrationTests/PoolManagerTestEventHandler.cs
+++ b/Content.IntegrationTests/PoolManagerTestEventHandler.cs
@@ -1,7 +1,4 @@
-
-[assembly: Parallelizable(ParallelScope.Children)]
-
-namespace Content.IntegrationTests;
+namespace Content.IntegrationTests;
 
 [SetUpFixture]
 public sealed class PoolManagerTestEventHandler
diff --git a/Content.Tests/AssemblyInfo.cs b/Content.Tests/AssemblyInfo.cs
new file mode 100644
index 000000000000..8e01f41b1833
--- /dev/null
+++ b/Content.Tests/AssemblyInfo.cs
@@ -0,0 +1,3 @@
+using NUnit.Framework;
+
+[assembly: Parallelizable(ParallelScope.Fixtures)]