diff --git a/lib/rewrite/source/ex.ex b/lib/rewrite/source/ex.ex
index 0c3d666..dceb9e2 100644
--- a/lib/rewrite/source/ex.ex
+++ b/lib/rewrite/source/ex.ex
@@ -15,7 +15,7 @@ defmodule Rewrite.Source.Ex do
   new code is parsed to a new `:quoted`. That means that
   `Source.update(source, :quoted, quoted)` also updates the AST.
 
-  The resyncing of `:quoted` can be suppressed with the option 
+  The resyncing of `:quoted` can be suppressed with the option
   `resync_quoted: false`.
 
   ## Examples
diff --git a/mix.exs b/mix.exs
index d557d98..ccb4210 100644
--- a/mix.exs
+++ b/mix.exs
@@ -71,7 +71,8 @@ defmodule Rewrite.MixProject do
   defp aliases do
     [
       carp: "test --trace --seed 0 --max-failures 1",
-      cover: "coveralls.html"
+      cover: "coveralls.html",
+      test: "ex_unit_ext.test --dbg-log"
     ]
   end
 
@@ -85,7 +86,8 @@ defmodule Rewrite.MixProject do
       {:credo, "~> 1.6", only: [:dev, :test], runtime: false},
       {:dialyxir, "~> 1.0", only: [:dev], runtime: false},
       {:ex_doc, "~> 0.25", only: :dev, runtime: false},
-      {:excoveralls, "~> 0.10", only: :test}
+      {:excoveralls, "~> 0.10", only: :test},
+      {:ex_unit_ext, "0.1.0-alpha.0", only: :test}
     ]
   end
 
diff --git a/mix.lock b/mix.lock
index adbb21b..0a53b9a 100644
--- a/mix.lock
+++ b/mix.lock
@@ -2,23 +2,26 @@
   "benchee": {:hex, :benchee, "1.3.1", "c786e6a76321121a44229dde3988fc772bca73ea75170a73fd5f4ddf1af95ccf", [:mix], [{:deep_merge, "~> 1.0", [hex: :deep_merge, repo: "hexpm", optional: false]}, {:statistex, "~> 1.0", [hex: :statistex, repo: "hexpm", optional: false]}, {:table, "~> 0.1.0", [hex: :table, repo: "hexpm", optional: true]}], "hexpm", "76224c58ea1d0391c8309a8ecbfe27d71062878f59bd41a390266bf4ac1cc56d"},
   "benchee_dsl": {:hex, :benchee_dsl, "0.5.3", "f214a33076c79b205780e21a9712f977e1aaf2402acb8b59ff99cd4e9c151499", [:mix], [{:benchee, ">= 0.99.0 and < 2.0.0", [hex: :benchee, repo: "hexpm", optional: false]}, {:kino, "~> 0.6", [hex: :kino, repo: "hexpm", optional: false]}], "hexpm", "68b829aa4d2782a225dcb0b9652e440b49264b78aa37fe4e120fe784bbfcb466"},
   "bunt": {:hex, :bunt, "1.0.0", "081c2c665f086849e6d57900292b3a161727ab40431219529f13c4ddcf3e7a44", [:mix], [], "hexpm", "dc5f86aa08a5f6fa6b8096f0735c4e76d54ae5c9fa2c143e5a1fc7c1cd9bb6b5"},
+  "conv_case": {:hex, :conv_case, "0.2.3", "c1455c27d3c1ffcdd5f17f1e91f40b8a0bc0a337805a6e8302f441af17118ed8", [:mix], [], "hexpm", "88f29a3d97d1742f9865f7e394ed3da011abb7c5e8cc104e676fdef6270d4b4a"},
   "credo": {:hex, :credo, "1.7.8", "9722ba1681e973025908d542ec3d95db5f9c549251ba5b028e251ad8c24ab8c5", [:mix], [{:bunt, "~> 0.2.1 or ~> 1.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2 or ~> 1.0", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "cb9e87cc64f152f3ed1c6e325e7b894dea8f5ef2e41123bd864e3cd5ceb44968"},
   "deep_merge": {:hex, :deep_merge, "1.0.0", "b4aa1a0d1acac393bdf38b2291af38cb1d4a52806cf7a4906f718e1feb5ee961", [:mix], [], "hexpm", "ce708e5f094b9cd4e8f2be4f00d2f4250c4095be93f8cd6d018c753894885430"},
   "dialyxir": {:hex, :dialyxir, "1.4.4", "fb3ce8741edeaea59c9ae84d5cec75da00fa89fe401c72d6e047d11a61f65f70", [:mix], [{:erlex, ">= 0.2.7", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "cd6111e8017ccd563e65621a4d9a4a1c5cd333df30cebc7face8029cacb4eff6"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.41", "ab34711c9dc6212dda44fcd20ecb87ac3f3fce6f0ca2f28d4a00e4154f8cd599", [:mix], [], "hexpm", "a81a04c7e34b6617c2792e291b5a2e57ab316365c2644ddc553bb9ed863ebefa"},
   "erlex": {:hex, :erlex, "0.2.7", "810e8725f96ab74d17aac676e748627a07bc87eb950d2b83acd29dc047a30595", [:mix], [], "hexpm", "3ed95f79d1a844c3f6bf0cea61e0d5612a42ce56da9c03f01df538685365efb0"},
+  "escape": {:hex, :escape, "0.2.0", "346fced73c28087a42288e164df56ca5ee2966ce2a355b8c6a507a8dbe077353", [:mix], [], "hexpm", "a6fee4fd8c42c85379187edc4b6c69f027fed828ea14283b162bf0e124f6bc8e"},
   "ex_doc": {:hex, :ex_doc, "0.34.2", "13eedf3844ccdce25cfd837b99bea9ad92c4e511233199440488d217c92571e8", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "5ce5f16b41208a50106afed3de6a2ed34f4acfd65715b82a0b84b49d995f95c1"},
+  "ex_unit_ext": {:hex, :ex_unit_ext, "0.1.0-alpha.0", "6f964a9acd3ff804418d8ea2b1a7eee52f8e6885d5bde08d6623b4c80f120594", [:mix], [{:conv_case, "~> 0.1", [hex: :conv_case, repo: "hexpm", optional: false]}, {:escape, "~> 0.2", [hex: :escape, repo: "hexpm", optional: false]}], "hexpm", "c68ac7e9d2cb1299eac722a2d8ef01e917426e01ccb67802d2aaa3e07a799b29"},
   "excoveralls": {:hex, :excoveralls, "0.18.3", "bca47a24d69a3179951f51f1db6d3ed63bca9017f476fe520eb78602d45f7756", [:mix], [{:castore, "~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "746f404fcd09d5029f1b211739afb8fb8575d775b21f6a3908e7ce3e640724c6"},
   "file_system": {:hex, :file_system, "1.0.1", "79e8ceaddb0416f8b8cd02a0127bdbababe7bf4a23d2a395b983c1f8b3f73edd", [:mix], [], "hexpm", "4414d1f38863ddf9120720cd976fce5bdde8e91d8283353f0e31850fa89feb9e"},
   "fss": {:hex, :fss, "0.1.1", "9db2344dbbb5d555ce442ac7c2f82dd975b605b50d169314a20f08ed21e08642", [:mix], [], "hexpm", "78ad5955c7919c3764065b21144913df7515d52e228c09427a004afe9c1a16b0"},
-  "glob_ex": {:hex, :glob_ex, "0.1.10", "d819a368637495a5c1962ef34f48fe4e9a09032410b96ade5758f2cd1cc5fcde", [:mix], [], "hexpm", "c75357e57d71c85ef8ef7269b6e787dce3f0ff71e585f79a90e4d5477c532b90"},
+  "glob_ex": {:hex, :glob_ex, "0.1.11", "cb50d3f1ef53f6ca04d6252c7fde09fd7a1cf63387714fe96f340a1349e62c93", [:mix], [], "hexpm", "342729363056e3145e61766b416769984c329e4378f1d558b63e341020525de4"},
   "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
   "kino": {:hex, :kino, "0.14.2", "46c5da03f2d62dc119ec5e1c1493f409f08998eac26015ecdfae322ffff46d76", [:mix], [{:fss, "~> 0.1.0", [hex: :fss, repo: "hexpm", optional: false]}, {:nx, "~> 0.1", [hex: :nx, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: true]}, {:table, "~> 0.1.2", [hex: :table, repo: "hexpm", optional: false]}], "hexpm", "f54924dd0800ee8b291fe437f942889e90309eb3541739578476f53c1d79c968"},
   "makeup": {:hex, :makeup, "1.1.2", "9ba8837913bdf757787e71c1581c21f9d2455f4dd04cfca785c70bbfff1a76a3", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "cce1566b81fbcbd21eca8ffe808f33b221f9eee2cbc7a1706fc3da9ff18e6cac"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.16.2", "627e84b8e8bf22e60a2579dad15067c755531fea049ae26ef1020cad58fe9578", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "41193978704763f6bbe6cc2758b84909e62984c7752b3784bd3c218bb341706b"},
   "makeup_erlang": {:hex, :makeup_erlang, "1.0.1", "c7f58c120b2b5aa5fd80d540a89fdf866ed42f1f3994e4fe189abebeab610839", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "8a89a1eeccc2d798d6ea15496a6e4870b75e014d1af514b1b71fa33134f57814"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
-  "sourceror": {:hex, :sourceror, "1.7.0", "62c34f4e3a109d837edd652730219b6332745e0ec7db34d5d350a5cdf30b376a", [:mix], [], "hexpm", "3dd2b1bd780fd0df48089f48480a54fd065bf815b63ef8046219d7784e7435f3"},
+  "sourceror": {:hex, :sourceror, "1.7.1", "599d78f4cc2be7d55c9c4fd0a8d772fd0478e3a50e726697c20d13d02aa056d4", [:mix], [], "hexpm", "cd6f268fe29fa00afbc535e215158680a0662b357dc784646d7dff28ac65a0fc"},
   "statistex": {:hex, :statistex, "1.0.0", "f3dc93f3c0c6c92e5f291704cf62b99b553253d7969e9a5fa713e5481cd858a5", [:mix], [], "hexpm", "ff9d8bee7035028ab4742ff52fc80a2aa35cece833cf5319009b52f1b5a86c27"},
   "table": {:hex, :table, "0.1.2", "87ad1125f5b70c5dea0307aa633194083eb5182ec537efc94e96af08937e14a8", [:mix], [], "hexpm", "7e99bc7efef806315c7e65640724bf165c3061cdc5d854060f74468367065029"},
   "text_diff": {:hex, :text_diff, "0.1.0", "1caf3175e11a53a9a139bc9339bd607c47b9e376b073d4571c031913317fecaa", [:mix], [], "hexpm", "d1ffaaecab338e49357b6daa82e435f877e0649041ace7755583a0ea3362dbd7"},
diff --git a/test/hook/dot_formatter_updater_test.exs b/test/hook/dot_formatter_updater_test.exs
index a7f60a6..7cbed1e 100644
--- a/test/hook/dot_formatter_updater_test.exs
+++ b/test/hook/dot_formatter_updater_test.exs
@@ -1,5 +1,5 @@
 defmodule Rewrite.Hook.DotFormatterUpdaterTest do
-  use RewriteCase, async: false
+  use RewriteCase
 
   alias Rewrite.Hook.DotFormatterUpdater
   alias Rewrite.Source
diff --git a/test/rewrite/dot_formatter_test.exs b/test/rewrite/dot_formatter_test.exs
index 1440162..31919c4 100644
--- a/test/rewrite/dot_formatter_test.exs
+++ b/test/rewrite/dot_formatter_test.exs
@@ -1,5 +1,5 @@
 defmodule Rewrite.DotFormatterTest do
-  use RewriteCase, async: false
+  use RewriteCase
 
   import GlobEx.Sigils
 
diff --git a/test/rewrite_test.exs b/test/rewrite_test.exs
index 21521fc..c3c78cb 100644
--- a/test/rewrite_test.exs
+++ b/test/rewrite_test.exs
@@ -1,5 +1,5 @@
 defmodule RewriteTest do
-  use RewriteCase, async: false
+  use RewriteCase
 
   import GlobEx.Sigils
 
diff --git a/test/support/rewrite_case.ex b/test/support/rewrite_case.ex
index b7e7725..e01d3d4 100644
--- a/test/support/rewrite_case.ex
+++ b/test/support/rewrite_case.ex
@@ -70,7 +70,7 @@ end
 defmodule RewriteCase do
   @moduledoc false
 
-  use ExUnit.CaseTemplate, async: false
+  use ExUnit.CaseTemplate
 
   using do
     quote do