The "all_collection_stats.js" test verifies the correct behavior of $_internalAllCollectionStats by comparing each collection with $collStats statistics. However, there is a race condition because these two aggregations are issued at different points in time. There is a chance that WT checkpoints between those aggregations and may causes the statistics to differ (e.g., storageSize).

I propose updating the test to enhance its robustness. It should be sufficient to validate $_internalAllCollectionStats by ensuring that it eventually provides the same statistics as $collStats, perhaps using an `assert.soon`.