| Index: lib/src/runner/engine.dart | 
| diff --git a/lib/src/runner/engine.dart b/lib/src/runner/engine.dart | 
| index 208d4f766ea170ff500b95118ab58abaefe4f8a0..c570d4aa179849f2782575129068043dba137fc3 100644 | 
| --- a/lib/src/runner/engine.dart | 
| +++ b/lib/src/runner/engine.dart | 
| @@ -144,7 +144,7 @@ class Engine { | 
| Engine({int concurrency, int maxSuites}) | 
| : _runPool = new Pool(concurrency == null ? 1 : concurrency), | 
| _loadPool = new Pool(maxSuites == null | 
| -            ? (concurrency == null ? 4 : concurrency * 4) | 
| +            ? (concurrency == null ? 2 : concurrency * 2) | 
| : maxSuites) { | 
| _group.future.then((_) { | 
| if (_closedBeforeDone == null) _closedBeforeDone = false; | 
|  |