diff --git a/build/tasks/spec-task.coffee b/build/tasks/spec-task.coffee
index 1126e2541..1151974b2 100644
--- a/build/tasks/spec-task.coffee
+++ b/build/tasks/spec-task.coffee
@@ -78,7 +78,7 @@ module.exports = (grunt) ->
       continue unless isAtomPackage(packagePath)
       packageSpecQueue.push(packagePath)
 
-    packageSpecQueue.concurrency = Math.min(1, concurrency - 1)
+    packageSpecQueue.concurrency = Math.max(1, concurrency - 1)
     packageSpecQueue.drain = -> callback(null, failedPackages)
 
   runCoreSpecs = (callback) ->