diff --git a/.github/workflows/elixir.yml b/.github/workflows/ci.yml
similarity index 53%
rename from .github/workflows/elixir.yml
rename to .github/workflows/ci.yml
index dea88d8..ff9d628 100644
--- a/.github/workflows/elixir.yml
+++ b/.github/workflows/ci.yml
@@ -3,7 +3,7 @@
 # separate terms of service, privacy policy, and support
 # documentation.
 
-name: Elixir CI
+name: CI
 
 on:
   push:
@@ -15,29 +15,43 @@ permissions:
   contents: read
 
 jobs:
-  build:
+  tests:
 
     name: build and test
     runs-on: ubuntu-latest
     env:
       MIX_ENV: test
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - elixir: "1.19.5"
+            otp: "28.3.1"
+          - elixir: "1.17.3"
+            otp: "27.3.4.7"
+          - elixir: "1.13.4"
+            otp: "25.3.2.21"
+
     steps:
     - uses: actions/checkout@v4
     - name: Set up Elixir
       uses: erlef/setup-beam@v1.20.4
       with:
-        otp-version: 28.3.1
-        elixir-version: 1.19.5
-    - name: Restore dependencies cache
+        elixir-version: ${{ matrix.elixir }}
+        otp-version: ${{ matrix.otp }}
+    - name: Restore deps and _build cache
       uses: actions/cache@v3
       with:
-        path: deps
-        key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
-        restore-keys: ${{ runner.os }}-mix-
+        path: |
+          deps
+          _build
+        key: ${{ runner.os }}-${{ matrix.elixir }}-${{ matrix.otp }}-${{ hashFiles('**/mix.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-${{ matrix.elixir }}-${{ matrix.otp }}-
     - name: Install dependencies
       run: mix deps.get
     - name: Run tests
-      run: mix coveralls.github
+      run: make test-code 
     - name: Check code
       run: make analyze-code
diff --git a/Makefile b/Makefile
index 5026d4a..43f6791 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 
 .PHONY: test-code
 test-code:
-	mix cover.lint
+	mix coveralls.github
 
 .PHONY: analyze-code
 analyze-code:
diff --git a/mix.exs b/mix.exs
index 411dd0a..b64a725 100644
--- a/mix.exs
+++ b/mix.exs
@@ -9,7 +9,7 @@ defmodule ModuleResolver.MixProject do
     [
       app: :module_resolver,
       version: "0.1.0",
-      elixir: "~> 1.12",
+      elixir: "~> 1.13",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       package: package(),
@@ -60,10 +60,7 @@ defmodule ModuleResolver.MixProject do
     [
       preferred_envs: [
         cover: :test,
-        "cover.detail": :test,
-        "cover.html": :test,
-        "cover.filter": :test,
-        "cover.lint": :test,
+        "coveralls.github": :test,
         credo: :test,
         dialyzer: :test
       ]