diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 11d8699e4..284658620 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -66,6 +66,8 @@ jobs:
 
       - name: Embedding tests
         run: dotnet test --runtime any-${{ matrix.platform }} --logger "console;verbosity=detailed" src/embed_tests/
+        env:
+          MONO_THREADS_SUSPEND: preemptive # https://github.com/mono/mono/issues/21466
 
       - name: Python Tests (Mono)
         if: ${{ matrix.os != 'windows' }}