diff --git a/ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj b/ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj
index 58ebff48b..714454f75 100644
--- a/ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj
+++ b/ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj
@@ -18,6 +18,12 @@
 
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
 
+    <!-- The suite runs dozens of allocation-heavy decompiles concurrently (one NUnit worker per
+         logical CPU, each roundtrip adding WholeProjectDecompiler's own Parallel.ForEach). Workstation
+         GC stops the whole process for every gen0/gen1 collection any worker triggers; measured on a
+         24-thread machine that was ~300 s of pause in a ~550 s run. Server GC gives each core its own
+         heap and collects in parallel. -->
+    <ServerGarbageCollection>true</ServerGarbageCollection>
     <!-- NU1902/1903 are "Package 'X' has a known security vulnerability". In our tests, we don't care. -->
     <!-- CA1416 fires because the TFM dropped its -windows suffix: Windows-only helpers (SdkUtility,
          Tester.SignAssembly/FindMSBuild/RunWithTestRunner) and Windows-only test inputs (Console.CapsLock