diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 7e4450cb..ee232587 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         otp: ['23.3.4.7', '24.1']
-        elixir: ['1.12.3']
+        elixir: ['1.11.4', '1.12.3', '1.13.3']
     steps:
       - uses: actions/checkout@v2
       - uses: erlef/setup-beam@v1
diff --git a/.tool-versions b/.tool-versions
index d09fd270..24efada7 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1,2 @@
-elixir 1.12.2-otp-23
+elixir 1.12.3
+erlang 24.1
diff --git a/lib/gradient/elixir_expr.ex b/lib/gradient/elixir_expr.ex
index d532bf5a..a6a211b7 100644
--- a/lib/gradient/elixir_expr.ex
+++ b/lib/gradient/elixir_expr.ex
@@ -106,7 +106,7 @@ defmodule Gradient.ElixirExpr do
     "reraise " <> pp_expr(var) <> ", " <> pp_expr(var_stacktrace)
   end
 
-  def pp_expr({:call, _, {:remote, _, {:atom, _, :erlang}, {:atom, _, :error}}, [arg]}) do
+  def pp_expr({:call, _, {:remote, _, {:atom, _, :erlang}, {:atom, _, :error}}, [arg | _]}) do
     "raise " <> pp_raise_arg(arg)
   end
 
@@ -405,7 +405,7 @@ defmodule Gradient.ElixirExpr do
   defp bin_pp_value(val), do: pp_expr(val)
 
   defp bin_set_value("", value), do: value
-  defp bin_set_value(sufix, value), do: value <> "::" <> sufix
+  defp bin_set_value(sufix, value), do: "(" <> value <> ")::" <> sufix
 
   defp bin_set_size("", :default), do: ""
   defp bin_set_size("", {:integer, _, size}), do: Integer.to_string(size)
diff --git a/mix.exs b/mix.exs
index e116ef3a..398b4d9d 100644
--- a/mix.exs
+++ b/mix.exs
@@ -5,7 +5,7 @@ defmodule Gradient.MixProject do
     [
       app: :gradient,
       version: "0.1.0",
-      elixir: "~> 1.12",
+      elixir: "~> 1.11",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
       deps: deps(),
diff --git a/test/examples/range.ex b/test/examples/1.12/range_step.ex
similarity index 91%
rename from test/examples/range.ex
rename to test/examples/1.12/range_step.ex
index f080893f..f9ff6db7 100644
--- a/test/examples/range.ex
+++ b/test/examples/1.12/range_step.ex
@@ -1,4 +1,4 @@
-defmodule RangeEx do
+defmodule RangeStep do
   def range do
     1..12
   end
diff --git a/test/examples/simple_range.ex b/test/examples/simple_range.ex
new file mode 100644
index 00000000..41f4b614
--- /dev/null
+++ b/test/examples/simple_range.ex
@@ -0,0 +1,5 @@
+defmodule SimpleRange do
+  def range do
+    1..12
+  end
+end
diff --git a/test/examples/tuple.ex b/test/examples/tuple.ex
index 95d7c367..bb102bf8 100644
--- a/test/examples/tuple.ex
+++ b/test/examples/tuple.ex
@@ -1,4 +1,4 @@
-defmodule Tuple do
+defmodule TupleEx do
   def tuple do
     {:ok, 12}
   end
diff --git a/test/gradient/ast_specifier_test.exs b/test/gradient/ast_specifier_test.exs
index 5dcb3c6b..c85e14f3 100644
--- a/test/gradient/ast_specifier_test.exs
+++ b/test/gradient/ast_specifier_test.exs
@@ -101,7 +101,7 @@ defmodule Gradient.AstSpecifierTest do
     end
 
     test "tuple" do
-      {tokens, ast} = load("Elixir.Tuple.beam", "tuple.ex")
+      {tokens, ast} = load("Elixir.TupleEx.beam", "tuple.ex")
 
       [tuple_in_str2, tuple_in_str, tuple_in_list, _list_in_tuple, tuple | _] =
         AstSpecifier.run_mappers(ast, tokens) |> Enum.reverse()
@@ -625,8 +625,29 @@ defmodule Gradient.AstSpecifierTest do
             ]} = guarded_case
   end
 
+  @tag :ex_lt_1_12
   test "range" do
-    {tokens, ast} = load("Elixir.RangeEx.beam", "range.ex")
+    {tokens, ast} = load("Elixir.SimpleRange.beam", "simple_range.ex")
+
+    [range | _] = AstSpecifier.run_mappers(ast, tokens) |> Enum.reverse()
+
+    assert {:function, 2, :range, 0,
+            [
+              {:clause, 2, [], [],
+               [
+                 {:map, 3,
+                  [
+                    {:map_field_assoc, 3, {:atom, 3, :__struct__}, {:atom, 3, Range}},
+                    {:map_field_assoc, 3, {:atom, 3, :first}, {:integer, 3, 1}},
+                    {:map_field_assoc, 3, {:atom, 3, :last}, {:integer, 3, 12}}
+                  ]}
+               ]}
+            ]} = range
+  end
+
+  @tag :ex_gt_1_11
+  test "step range" do
+    {tokens, ast} = load("Elixir.RangeStep.beam", "1.12/range_step.ex")
 
     [to_list, match_range, rev_range_step, range_step, range | _] =
       AstSpecifier.run_mappers(ast, tokens) |> Enum.reverse()
@@ -711,6 +732,24 @@ defmodule Gradient.AstSpecifierTest do
 
     [block | _] = AstSpecifier.run_mappers(ast, tokens) |> Enum.reverse()
 
+    range =
+      if System.version() >= "1.12" do
+        {:map, 11,
+         [
+           {:map_field_assoc, 11, {:atom, 11, :__struct__}, {:atom, 11, Range}},
+           {:map_field_assoc, 11, {:atom, 11, :first}, {:integer, 11, 0}},
+           {:map_field_assoc, 11, {:atom, 11, :last}, {:integer, 11, 5}},
+           {:map_field_assoc, 11, {:atom, 11, :step}, {:integer, 11, 1}}
+         ]}
+      else
+        {:map, 11,
+         [
+           {:map_field_assoc, 11, {:atom, 11, :__struct__}, {:atom, 11, Range}},
+           {:map_field_assoc, 11, {:atom, 11, :first}, {:integer, 11, 0}},
+           {:map_field_assoc, 11, {:atom, 11, :last}, {:integer, 11, 5}}
+         ]}
+      end
+
     assert {:function, 10, :lc_complex, 0,
             [
               {:clause, 10, [], [],
@@ -719,13 +758,7 @@ defmodule Gradient.AstSpecifierTest do
                   [
                     {:call, 11, {:remote, 11, {:atom, 11, Enum}, {:atom, 11, :reduce}},
                      [
-                       {:map, 11,
-                        [
-                          {:map_field_assoc, 11, {:atom, 11, :__struct__}, {:atom, 11, Range}},
-                          {:map_field_assoc, 11, {:atom, 11, :first}, {:integer, 11, 0}},
-                          {:map_field_assoc, 11, {:atom, 11, :last}, {:integer, 11, 5}},
-                          {:map_field_assoc, 11, {:atom, 11, :step}, {:integer, 11, 1}}
-                        ]},
+                       ^range,
                        {nil, 11},
                        {:fun, 11,
                         {:clauses,
@@ -823,6 +856,7 @@ defmodule Gradient.AstSpecifierTest do
                                    {:bin_element, 7, {:string, 7, 'oops'}, :default, :default}
                                  ]}
                               ]}
+                             | _
                            ]}
                         ]},
                        {:clause, [generated: true, location: 4],
@@ -950,6 +984,7 @@ defmodule Gradient.AstSpecifierTest do
                               :default, :default}
                            ]}
                         ]}
+                       | _
                      ]}
                   ], [], [],
                   [
@@ -972,6 +1007,7 @@ defmodule Gradient.AstSpecifierTest do
                           {:cons, 52, {:integer, 52, 49},
                            {:cons, 52, {:integer, 52, 50}, {nil, 52}}}
                         ]}
+                       | _
                      ]},
                     {:integer, 53, 1}
                   ], [], [], [{:op, 55, :-, {:integer, 55, 1}}]}
@@ -1049,6 +1085,8 @@ defmodule Gradient.AstSpecifierTest do
     [get2, get, update, empty, struct | _] =
       AstSpecifier.run_mappers(ast, tokens) |> Enum.reverse()
 
+    anno_line_17 = if(System.version() >= "1.12", do: [generated: true, location: 17], else: 17)
+
     assert {:function, 8, :update, 0,
             [
               {:clause, 8, [], [],
@@ -1070,18 +1108,17 @@ defmodule Gradient.AstSpecifierTest do
                         {:map, 17,
                          [
                            {:map_field_exact, 17, {:atom, [generated: true, location: 17], :x},
-                            {:var, [generated: true, location: 17], :_@1}}
+                            {:var, ^anno_line_17, :_@1}}
                          ]}
-                      ], [], [{:var, [generated: true, location: 17], :_@1}]},
-                     {:clause, [generated: true, location: 17],
-                      [{:var, [generated: true, location: 17], :_@1}],
+                      ], [], [{:var, ^anno_line_17, :_@1}]},
+                     {:clause, [generated: true, location: 17], [{:var, ^anno_line_17, :_@1}],
                       [
                         [
                           {:call, [generated: true, location: 17],
                            {:remote, [generated: true, location: 17],
                             {:atom, [generated: true, location: 17], :erlang},
                             {:atom, [generated: true, location: 17], :is_map}},
-                           [{:var, [generated: true, location: 17], :_@1}]}
+                           [{:var, ^anno_line_17, :_@1}]}
                         ]
                       ],
                       [
@@ -1091,16 +1128,15 @@ defmodule Gradient.AstSpecifierTest do
                             [
                               {:atom, 17, :badkey},
                               {:atom, 17, :x},
-                              {:var, [generated: true, location: 17], :_@1}
+                              {:var, ^anno_line_17, :_@1}
                             ]}
                          ]}
                       ]},
-                     {:clause, [generated: true, location: 17],
-                      [{:var, [generated: true, location: 17], :_@1}], [],
+                     {:clause, [generated: true, location: 17], [{:var, ^anno_line_17, :_@1}], [],
                       [
                         {:call, [generated: true, location: 17],
-                         {:remote, [generated: true, location: 17],
-                          {:var, [generated: true, location: 17], :_@1}, {:atom, 17, :x}}, []}
+                         {:remote, [generated: true, location: 17], {:var, ^anno_line_17, :_@1},
+                          {:atom, 17, :x}}, []}
                       ]}
                    ]}}
                ]}
diff --git a/test/gradient/elixir_expr_test.exs b/test/gradient/elixir_expr_test.exs
index 02b69e5d..31f12125 100644
--- a/test/gradient/elixir_expr_test.exs
+++ b/test/gradient/elixir_expr_test.exs
@@ -56,7 +56,7 @@ defmodule Gradient.ElixirExprTest do
         end
         |> ElixirExpr.pp_expr()
 
-      assert "pixels = <<213, 45, 132, 64, 76, 32, 76, 0, 0, 234, 32, 15>>; for <<r::8, g::8, b::8 <- pixels >>, do: {r, g, b}" ==
+      assert "pixels = <<213, 45, 132, 64, 76, 32, 76, 0, 0, 234, 32, 15>>; for <<(r)::8, (g)::8, (b)::8 <- pixels >>, do: {r, g, b}" ==
                actual
     end
 
@@ -67,7 +67,7 @@ defmodule Gradient.ElixirExprTest do
         end
         |> ElixirExpr.pp_expr()
 
-      assert "for <<one, _rest::binary-size(3) <- <<1, 2, 3, 4>> >>, do: one" == actual
+      assert "for <<one, (_rest)::binary-size(3) <- <<1, 2, 3, 4>> >>, do: one" == actual
     end
 
     test "receive" do
@@ -328,8 +328,7 @@ defmodule Gradient.ElixirExprTest do
   end
 
   test "pp and format complex try expression" do
-    {_tokens, ast} =
-      Gradient.TestHelpers.load("Elixir.CallRemoteException.beam", "call_remote_exception.ex")
+    ast = Gradient.TestHelpers.load("Elixir.CallRemoteException.beam")
 
     {:function, _, :call, 2, [{:clause, _ann, _args, _guards, [try_expr]}]} =
       Enum.reverse(ast) |> List.first()
@@ -338,7 +337,58 @@ defmodule Gradient.ElixirExprTest do
 
     # FIXME `raise {:badkey, :stack, _gen}` is not correct
 
-    expected = ~s"""
+    expected_v1_11 = ~s"""
+    try do
+      :ok
+    catch
+      :error, %Plug.Conn.WrapperError{} = e ->
+        exception =
+          Exception.normalize(
+            :error,
+            case e do
+              %{reason: _} -> _
+              _ when :erlang.is_map(_) -> raise {:badkey, :reason, _}
+              _ -> _.reason()
+            end,
+            case e do
+              %{stack: _} -> _
+              _ when :erlang.is_map(_) -> raise {:badkey, :stack, _}
+              _ -> _.stack()
+            end
+          )
+
+        _ =
+          Sentry.capture_exception(exception, [
+            {:stacktrace,
+             case e do
+               %{stack: _} -> _
+               _ when :erlang.is_map(_) -> raise {:badkey, :stack, _}
+               _ -> _.stack()
+             end},
+            {:event_source, :plug}
+          ])
+
+        Plug.Conn.WrapperError.reraise(e)
+
+      :error, e ->
+        _ = Sentry.capture_exception(e, [{:stacktrace, __STACKTRACE__}, {:event_source, :plug}])
+        :erlang.raise(:error, e, __STACKTRACE__)
+
+      kind, reason ->
+        message =
+          <<"Uncaught ",
+            case kind do
+              _gen when :erlang.is_binary(_gen) -> _gen
+              _gen -> String.Chars.to_string(_gen)
+            end::binary, " - ", Kernel.inspect(reason)::binary>>
+
+        stack = __STACKTRACE__
+        _ = Sentry.capture_message(message, [{:stacktrace, stack}, {:event_source, :plug}])
+        :erlang.raise(kind, reason, stack)
+    end
+    """
+
+    expected_v1_12 = ~s"""
     try do
       :ok
     catch
@@ -389,6 +439,8 @@ defmodule Gradient.ElixirExprTest do
     end
     """
 
+    expected = if(System.version() >= "1.12", do: expected_v1_12, else: expected_v1_11)
+
     assert expected == :erlang.iolist_to_binary(res) <> "\n"
   end
 end
diff --git a/test/mix/tasks/gradient_test.exs b/test/mix/tasks/gradient_test.exs
index 2d2d150b..b21546d5 100644
--- a/test/mix/tasks/gradient_test.exs
+++ b/test/mix/tasks/gradient_test.exs
@@ -103,7 +103,7 @@ defmodule Mix.Tasks.GradientTest do
     assert not String.contains?(output, ex_spec_error_msg)
   end
 
-  @tag if(System.version() >= "1.13", do: :skip, else: :ok)
+  @tag :ex_lt_1_13
   test "--no-specify option" do
     output = run_task(test_opts([@s_wrong_ret_beam]))
     assert String.contains?(output, "on line 3")
diff --git a/test/support/expr_data.ex b/test/support/expr_data.ex
index 54f1964f..e45846c8 100644
--- a/test/support/expr_data.ex
+++ b/test/support/expr_data.ex
@@ -140,7 +140,7 @@ defmodule Gradient.ExprData do
       bin_with_bin_var(),
       bin_with_pp_int_size(),
       bin_with_pp_and_bitstring_size(),
-      {"bin float", elixir_to_ast(<<4.3::float>>), "<<4.3::float>>"}
+      {"bin float", elixir_to_ast(<<4.3::float>>), "<<(4.3)::float>>"}
     ]
   end
 
@@ -150,7 +150,7 @@ defmodule Gradient.ExprData do
         <<a::8, _rest::binary>> = <<1, 2, 3, 4>>
       end
 
-    {"bin pattern matching with bin var", ast, "<<a::8, _rest::binary>> = <<1, 2, 3, 4>>"}
+    {"bin pattern matching with bin var", ast, "<<(a)::8, (_rest)::binary>> = <<1, 2, 3, 4>>"}
   end
 
   defp bin_joining_syntax do
@@ -160,7 +160,7 @@ defmodule Gradient.ExprData do
         "a" <> x
       end
 
-    {"binary <> joining", ast, ~s(x = "b"; <<"a", x::binary>>)}
+    {"binary <> joining", ast, ~s(x = "b"; <<"a", (x\)::binary>>)}
   end
 
   defp bin_with_bin_var do
@@ -170,7 +170,7 @@ defmodule Gradient.ExprData do
         <<"a", "b", x::binary>>
       end
 
-    {"binary with bin var", ast, ~s(x = "b"; <<"a", "b", x::binary>>)}
+    {"binary with bin var", ast, ~s(x = "b"; <<"a", "b", (x\)::binary>>)}
   end
 
   defp bin_with_pp_int_size do
@@ -179,7 +179,7 @@ defmodule Gradient.ExprData do
         <<a::16>> = <<"abcd">>
       end
 
-    {"binary with int size", ast, ~s(<<a::16>> = "abcd")}
+    {"binary with int size", ast, ~s(<<(a\)::16>> = "abcd")}
   end
 
   defp bin_with_pp_and_bitstring_size do
@@ -191,7 +191,7 @@ defmodule Gradient.ExprData do
       end
 
     expected =
-      "<<header::8, length::32, message::bitstring-size(144)>> = <<1, 2, 3, 4, 5, 101, 114, 97, 115, 101, 32, 116, 104, 101, 32, 101, 118, 105, 100, 101, 110, 99, 101>>"
+      "<<(header)::8, (length)::32, (message)::bitstring-size(144)>> = <<1, 2, 3, 4, 5, 101, 114, 97, 115, 101, 32, 116, 104, 101, 32, 101, 118, 105, 100, 101, 110, 99, 101>>"
 
     {"binary with patter matching and bitstring-size", ast, expected}
   end
diff --git a/test/test_helper.exs b/test/test_helper.exs
index a86b330f..44a85b4f 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -1,12 +1,21 @@
-ExUnit.start()
-
 defmodule ExamplesCompiler do
   @build_path "test/examples/_build/"
 
+  @version_step 0.01
+
+  @version (case System.version() do
+              v when v >= "1.13" -> 1.13
+              v when v >= "1.12" -> 1.12
+              v when v >= "1.11" -> 1.11
+            end)
+
   def compile(pattern) do
     case File.mkdir(@build_path) do
       :ok ->
-        paths = Path.wildcard(pattern)
+        paths =
+          Path.wildcard(pattern)
+          |> filter_too_new_files()
+
         Kernel.ParallelCompiler.compile_to_path(paths, @build_path)
         :ok
 
@@ -14,6 +23,39 @@ defmodule ExamplesCompiler do
         :error
     end
   end
+
+  def excluded_version_tags do
+    case @version do
+      1.11 ->
+        [:ex_gt_1_11, :ex_lt_1_11]
+
+      1.12 ->
+        [:ex_lt_1_11, :ex_lt_1_12, :ex_gt_1_12, :ex_gt_1_13]
+
+      1.13 ->
+        [:ex_lt_1_11, :ex_lt_1_12, :ex_lt_1_13, :ex_gt_1_13]
+    end
+  end
+
+  defp filter_too_new_files(paths) do
+    case @version do
+      1.13 ->
+        paths
+
+      1.12 ->
+        drop_versions(paths, ["1.13"])
+
+      1.11 ->
+        drop_versions(paths, ["1.12", "1.13"])
+    end
+  end
+
+  defp drop_versions(paths, versions) do
+    Enum.filter(paths, &(not String.contains?(&1, versions)))
+  end
 end
 
 ExamplesCompiler.compile("test/examples/**/*.ex")
+exlcude = ExamplesCompiler.excluded_version_tags()
+
+ExUnit.start(exclude: exlcude)