diff --git a/src/CodeProject.ObjectPool/ObjectPool.cs b/src/CodeProject.ObjectPool/ObjectPool.cs
index 354f783..020e077 100644
--- a/src/CodeProject.ObjectPool/ObjectPool.cs
+++ b/src/CodeProject.ObjectPool/ObjectPool.cs
@@ -171,7 +171,7 @@ public int MaximumPoolSize
         /// <param name="config"></param>
         protected void StartEvictor(EvictionConfig config)
         {
-            if (this._timer != null && config.Enable)
+            if (config != null && this._timer != null && config.Enable)
             {
                 this._timer.Schedule(
                     () =>
diff --git a/src/CodeProject.ObjectPool/PooledObject.cs b/src/CodeProject.ObjectPool/PooledObject.cs
index 349f306..bc54099 100644
--- a/src/CodeProject.ObjectPool/PooledObject.cs
+++ b/src/CodeProject.ObjectPool/PooledObject.cs
@@ -69,6 +69,7 @@ internal bool ValidateObject(PooledObjectValidationContext validationContext)
                     {
                         this.PooledObjectInfo.State = PooledObjectState.ValidateFail;
                     }
+                    return verifyResult;
                 }
                 catch (Exception ex)
                 {