Serial test

Author: jdetter

.github/workflows/ci.yml

@@ -155,8 +155,9 @@ jobs:
         #Note: Unreal tests will be run separately
         run: cargo test --all -- --skip unreal
 
+        # The fallocate tests have been flakely when running in parallel
       - name: Run fallocate tests
-        run: cargo test -p spacetimedb-durability --features fallocate
+        run: cargo test -p spacetimedb-durability --features fallocate --test-threads=1
 
       - name: Check that the test outputs are up-to-date
         run: bash tools/check-diff.sh