diff --git a/test/norm/contract_test.exs b/test/norm/contract_test.exs
index 4004a07..e5cc721 100644
--- a/test/norm/contract_test.exs
+++ b/test/norm/contract_test.exs
@@ -39,7 +39,10 @@ defmodule Norm.ContractTest do
   end
 
   test "bad contract" do
-    assert_raise ArgumentError, ~r/got: `@contract\(foo\(n\)\)`/, fn ->
+    expected = if version().minor >= 13,
+      do: ~r/got: `@contract foo\(n\)`/, else: ~r/got: `@contract\(foo\(n\)\)`/
+
+    assert_raise ArgumentError, expected, fn ->
       defmodule BadContract do
         use Norm
 
@@ -105,4 +108,6 @@ defmodule Norm.ContractTest do
     assert inspect(contract) ==
              "%Norm.Contract{args: [a: #Norm.Spec<is_integer()>, arg2: #Norm.Spec<is_integer()>], result: #Norm.Spec<is_integer()>}"
   end
+
+  defp version, do: Version.parse!(System.version())
 end
diff --git a/test/norm/core/spec_test.exs b/test/norm/core/spec_test.exs
index c70b553..4d19e5a 100644
--- a/test/norm/core/spec_test.exs
+++ b/test/norm/core/spec_test.exs
@@ -15,7 +15,9 @@ defmodule Norm.Core.SpecTest do
       assert {:error, errors} = conform(nil, hex)
       assert errors == [%{spec: "is_binary()", input: nil, path: []}]
       assert {:error, errors} = conform("bad", hex)
-      assert errors == [%{spec: "&(String.starts_with?(&1, \"#\"))", input: "bad", path: []}]
+
+      spec = if version().minor >= 13, do: "&String.starts_with?(&1, \"#\")", else: "&(String.starts_with?(&1, \"#\"))"
+      assert errors == [%{spec: spec, input: "bad", path: []}]
     end
 
     test "'and' and 'or' can be chained" do
@@ -144,4 +146,6 @@ defmodule Norm.Core.SpecTest do
                "#Norm.Spec<is_integer() or is_float()>"
     end
   end
+
+  defp version, do: Version.parse!(System.version())
 end