diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 29ec16faf..c4b81956c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ on:
       - '.github/workflows/TagBot.yml'
       - 'docs/**'
   pull_request:
-      paths-ignore:
+    paths-ignore:
       - 'AUTHORS.md'
       - 'CITATION.bib'
       - 'CONTRIBUTING.md'
@@ -35,13 +35,25 @@ concurrency:
 
 jobs:
   build:
-    name: Run Tests
+    name: Run Tests (Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }})
     runs-on: ubuntu-latest
     strategy:
       matrix:
         version:
           - '1.9'
           - '1'
+        os:
+          - ubuntu-latest
+        arch:
+          - x64
+        include:
+          # Also run tests on Windows and macOS-ARM, but only with the latest Julia version
+          - version: '1'
+            os: windows-latest
+            arch: x64
+          - version: '1'
+            os: macos-14
+            arch: arm64
 
     steps:
       - name: Check out project
@@ -57,14 +69,19 @@ jobs:
         uses: julia-actions/julia-runtest@v1
         with:
           annotate: true
-          coverage: true
+          # Only run coverage in one Job (Ubuntu and latest Julia version)
+          coverage: ${{ matrix.os == 'ubuntu-latest' && matrix.version == '1' }}
         env:
           TRIXIPARTICLES_TEST: unit
       - name: Process coverage results
+        # Only run coverage in one Job (Ubuntu and latest Julia version)
+        if: matrix.os == 'ubuntu-latest' && matrix.version == '1'
         uses: julia-actions/julia-processcoverage@v1
         with:
           directories: src,test
       - name: Upload coverage report to Codecov
+        # Only run coverage in one Job (Ubuntu and latest Julia version)
+        if: matrix.os == 'ubuntu-latest' && matrix.version == '1'
         uses: codecov/codecov-action@v4
         with:
           files: lcov.info