diff --git a/.dialyzer_ignore.exs b/.dialyzer_ignore.exs
index 70f67515..fe51488c 100644
--- a/.dialyzer_ignore.exs
+++ b/.dialyzer_ignore.exs
@@ -1,11 +1 @@
-[
-  ~r/lib\/flop\/schema\.ex.*no_return Function default_limit\/1 has no local return\./,
-  ~r/lib\/flop\/schema\.ex.*no_return Function default_order\/1 has no local return\./,
-  ~r/lib\/flop\/schema\.ex.*no_return Function field_info\/2 has no local return\./,
-  ~r/lib\/flop\/schema\.ex.*no_return Function field_type\/2 has no local return\./,
-  ~r/lib\/flop\/schema\.ex.*no_return Function filterable\/1 has no local return\./,
-  ~r/lib\/flop\/schema\.ex.*no_return Function max_limit\/1 has no local return\./,
-  ~r/lib\/flop\/schema\.ex.*no_return Function pagination_types\/1 has no local return\./,
-  ~r/lib\/flop\/schema\.ex.*no_return Function default_pagination_type\/1 has no local return\./,
-  ~r/lib\/flop\/schema\.ex.*no_return Function sortable\/1 has no local return\./
-]
+[]
diff --git a/lib/flop/adapter.ex b/lib/flop/adapter.ex
index 1b45af6f..cc2e2e51 100644
--- a/lib/flop/adapter.ex
+++ b/lib/flop/adapter.ex
@@ -67,5 +67,5 @@ defmodule Flop.Adapter do
   This callback will be removed as soon as a better solution is found or made
   possible.
   """
-  @callback custom_func_builder(opts) :: any when opts: keyword
+  @callback custom_func_builder(opts) :: Macro.t() when opts: keyword
 end
diff --git a/lib/flop/schema.ex b/lib/flop/schema.ex
index 89f1f472..117d5695 100644
--- a/lib/flop/schema.ex
+++ b/lib/flop/schema.ex
@@ -846,7 +846,7 @@ defprotocol Flop.Schema do
   def max_limit(data)
 
   @doc false
-  @spec custom(any, any) :: Macro.t()
+  @spec custom(any, any) :: any
   def custom(data, arg)
 end
 
diff --git a/mix.exs b/mix.exs
index f9b33020..565bb6f9 100644
--- a/mix.exs
+++ b/mix.exs
@@ -14,16 +14,17 @@ defmodule Flop.MixProject do
       deps: deps(),
       test_coverage: [tool: ExCoveralls],
       preferred_cli_env: [
-        coveralls: :test,
         "coveralls.detail": :test,
-        "coveralls.post": :test,
-        "coveralls.html": :test,
         "coveralls.github": :test,
+        "coveralls.html": :test,
         "coveralls.json": :test,
+        "coveralls.post": :test,
         "ecto.create": :test,
         "ecto.drop": :test,
         "ecto.migrate": :test,
-        "ecto.reset": :test
+        "ecto.reset": :test,
+        coveralls: :test,
+        dialyzer: :test
       ],
       dialyzer: [
         ignore_warnings: ".dialyzer_ignore.exs",
@@ -55,7 +56,7 @@ defmodule Flop.MixProject do
   defp deps do
     [
       {:credo, "~> 1.7.0", only: [:dev, :test], runtime: false},
-      {:dialyxir, "~> 1.3.0", only: [:dev], runtime: false},
+      {:dialyxir, "~> 1.3.0", only: [:dev, :test], runtime: false},
       {:ecto, "~> 3.9"},
       {:ecto_sql, "~> 3.9", only: :test},
       {:ex_doc, "~> 0.21", only: :dev, runtime: false},