diff --git a/.credo.exs b/.credo.exs
index 00894662..d27f0a4d 100644
--- a/.credo.exs
+++ b/.credo.exs
@@ -71,7 +71,19 @@
         # or the `schema` macro in Ecto schemas to trigger DuplicatedCode, just
         # set the `excluded_macros` parameter to `[:schema, :setup, :test]`.
         #
-        {Credo.Check.Design.DuplicatedCode, excluded_macros: []},
+        {
+          Credo.Check.Design.DuplicatedCode,
+          excluded_macros: [],
+          files: %{
+            excluded: [
+              # Tests may have a bit of duplication, it's fine
+              "test/**/*_test.exs",
+              # Ah the formatters... we may want to make them nicer one of these days or use a library.
+              # But.. not now.
+              "lib/benchee/formatters/console/*.ex"
+            ]
+          }
+        },
         # You can also customize the exit_status of each check.
         # If you don't want TODO comments to cause `mix credo` to fail, just
         # set this value to 0 (zero).
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8014f52b..ffe905d9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -40,10 +40,10 @@ jobs:
             otp_version: '27.3'
           - elixir_version: '1.18'
             otp_version: '27.3'
+          - elixir_version: '1.19'
+            otp_version: '28.1'
             type_check: true
             lint: true
-          - elixir_version: '1.19.0-rc.2'
-            otp_version: '28.1'
 
     steps:
       - name: Checkout