diff --git a/src/UnitTests/Bug/MultiThreadingIssues.cs b/src/UnitTests/Bug/MultiThreadingIssues.cs
index 8bbf0e314..f72041fc9 100644
--- a/src/UnitTests/Bug/MultiThreadingIssues.cs
+++ b/src/UnitTests/Bug/MultiThreadingIssues.cs
@@ -641,7 +641,7 @@ public async Task Should_work()
         };
         var tasks =
             types
-            .Concat(types.Select(t => t.Reverse().ToArray()))
+            .Concat(types.Select((IEnumerable<Type> t) => t.Reverse().ToArray()))
             .Select(t=>(SourceType: sourceType.MakeGenericType(t[0]), DestinationType: destinationType.MakeGenericType(t[1])))
             .ToArray()
             .Select(s => Task.Factory.StartNew(() => c.ResolveTypeMap(s.SourceType, s.DestinationType)))
@@ -1173,11 +1173,11 @@ public async Task Should_work()
         };
         var tasks =
             types
-            .Concat(types.Select(t => t.Reverse().ToArray()))
+            .Concat(types.Select((IEnumerable<Type> t) => t.Reverse().ToArray()))
             .Select(t=>(SourceType: sourceType.MakeGenericType(t[0]), DestinationType: destinationType.MakeGenericType(t[1])))
             .ToArray()
             .Select(s => Task.Factory.StartNew(() => mapper.Map(null, s.SourceType, s.DestinationType)))
             .ToArray();
         await Task.WhenAll(tasks);
     }
-}
\ No newline at end of file
+}