diff --git a/lib/credo/check/readability/with_custom_tagged_tuple.ex b/lib/credo/check/readability/with_custom_tagged_tuple.ex
index d28a40c1b..41a4960f0 100644
--- a/lib/credo/check/readability/with_custom_tagged_tuple.ex
+++ b/lib/credo/check/readability/with_custom_tagged_tuple.ex
@@ -75,7 +75,8 @@ defmodule Credo.Check.Readability.WithCustomTaggedTuple do
   defp issue_for(error, issue_meta) do
     format_issue(
       issue_meta,
-      message: "Avoid using tagged tuples as placeholders in `with` (found: `#{inspect(error.tuple_tag)}`).",
+      message:
+        "Avoid using tagged tuples as placeholders in `with` (found: `#{inspect(error.tuple_tag)}`).",
       line_no: error.line,
       trigger: inspect(error.tuple_tag)
     )
diff --git a/lib/credo/check/refactor/append_single_item.ex b/lib/credo/check/refactor/append_single_item.ex
index cacb9de58..2308733c6 100644
--- a/lib/credo/check/refactor/append_single_item.ex
+++ b/lib/credo/check/refactor/append_single_item.ex
@@ -48,7 +48,8 @@ defmodule Credo.Check.Refactor.AppendSingleItem do
   defp issue_for(issue_meta, line_no, trigger) do
     format_issue(
       issue_meta,
-      message: "Appending a single item to a list is inefficient, use `[head | tail]` notation (and `Enum.reverse/1` when order matters).",
+      message:
+        "Appending a single item to a list is inefficient, use `[head | tail]` notation (and `Enum.reverse/1` when order matters).",
       trigger: trigger,
       line_no: line_no
     )
diff --git a/lib/credo/check/warning/map_get_unsafe_pass.ex b/lib/credo/check/warning/map_get_unsafe_pass.ex
index eaa3db390..e8d2d62ad 100644
--- a/lib/credo/check/warning/map_get_unsafe_pass.ex
+++ b/lib/credo/check/warning/map_get_unsafe_pass.ex
@@ -83,7 +83,8 @@ defmodule Credo.Check.Warning.MapGetUnsafePass do
   defp issue_for(issue_meta, line_no, trigger) do
     format_issue(
       issue_meta,
-      message: "`Map.get` with no default return value is potentially unsafe in pipes, use `Map.get/3` instead.",
+      message:
+        "`Map.get` with no default return value is potentially unsafe in pipes, use `Map.get/3` instead.",
       trigger: trigger,
       line_no: line_no
     )
diff --git a/test/credo/check/readability/with_custom_tagged_tuple_test.exs b/test/credo/check/readability/with_custom_tagged_tuple_test.exs
index 4dc6c9eba..803d2b6db 100644
--- a/test/credo/check/readability/with_custom_tagged_tuple_test.exs
+++ b/test/credo/check/readability/with_custom_tagged_tuple_test.exs
@@ -45,10 +45,14 @@ defmodule Credo.Check.Readability.WithCustomTaggedTupleTest do
     |> assert_issues(fn issues ->
       [issue1, issue2] = issues
 
-      assert issue1.message == "Avoid using tagged tuples as placeholders in `with` (found: `:resource`)."
+      assert issue1.message ==
+               "Avoid using tagged tuples as placeholders in `with` (found: `:resource`)."
+
       assert issue1.trigger == ":resource"
 
-      assert issue2.message == "Avoid using tagged tuples as placeholders in `with` (found: `:authz`)."
+      assert issue2.message ==
+               "Avoid using tagged tuples as placeholders in `with` (found: `:authz`)."
+
       assert issue2.trigger == ":authz"
     end)
   end
diff --git a/test/regression/run_older_credo_version.exs b/test/regression/run_older_credo_version.exs
index d325cb325..b8d272b76 100644
--- a/test/regression/run_older_credo_version.exs
+++ b/test/regression/run_older_credo_version.exs
@@ -1,4 +1,4 @@
-[credo_version|rest] = System.argv()
+[credo_version | rest] = System.argv()
 
 Mix.install([
   {:credo, credo_version}