diff --git a/test/precision_test.exs b/test/precision_test.exs
index b99cbe0..d48e731 100644
--- a/test/precision_test.exs
+++ b/test/precision_test.exs
@@ -1,5 +1,6 @@
 defmodule PrecisionTest do
-  use ExUnit.Case
+  use ExUnit.Case,
+    async: false
 
   import Ecto.Query