diff --git a/config.json b/config.json
index b4caf9a2..27bd09c3 100644
--- a/config.json
+++ b/config.json
@@ -16,7 +16,7 @@
     "highlightjs_language": "lisp"
   },
   "test_runner": {
-    "average_run_time": 2.0
+    "average_run_time": 2
   },
   "files": {
     "solution": [