Update mix.exs

Co-authored-by: Andrea Leopardi <[email protected]>

Author: solnic

mix.exs

@@ -153,8 +153,9 @@ defmodule Sentry.Mixfile do
     integration_dir = Path.join("test_integrations", integration)
 
     {_, status} =
-      System.cmd("sh", ["-c", "cd #{integration_dir} && mix test #{Enum.join(args, " ")}"],
-        into: IO.binstream(:stdio, :line)
+      System.cmd("mix", ["test" | args],
+        into: IO.binstream(:stdio, :line),
+        cd: Path.join("test_integrations", integration)
       )
 
     if status > 0 do