diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000..4d6eb52
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,11 @@
+[run]
+omit =
+    # omit everything in /usr very important !
+    /usr/*
+    */local-worker/*
+
+[html]
+omit =
+    # omit everything in /usr very important !
+    /usr/*
+    */local-worker/*
\ No newline at end of file
diff --git a/.github/workflows/pr_validation.yml b/.github/workflows/pr_validation.yml
index 68dd3c5..3523186 100644
--- a/.github/workflows/pr_validation.yml
+++ b/.github/workflows/pr_validation.yml
@@ -60,9 +60,9 @@ jobs:
           coverage run -m pytest -v fedeca
       - name: Generate code coverage report
         run: |
-          coverage html --omit="*/local-worker/*"
+          coverage html
       - name: Upload coverage artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: test-coverage-report
           path: htmlcov/
diff --git a/badges/cov_badge.svg b/badges/cov_badge.svg
index 704c1cc..1882ce8 100644
--- a/badges/cov_badge.svg
+++ b/badges/cov_badge.svg
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="96" height="20" role="img" aria-label="coverage: 44%"><title>coverage: 44%</title><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="96" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#r)"><rect width="61" height="20" fill="#555"/><rect x="61" width="35" height="20" fill="#e05d44"/><rect width="96" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><text aria-hidden="true" x="315" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="510">coverage</text><text x="315" y="140" transform="scale(.1)" fill="#fff" textLength="510">coverage</text><text aria-hidden="true" x="775" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="250">44%</text><text x="775" y="140" transform="scale(.1)" fill="#fff" textLength="250">44%</text></g></svg>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="96" height="20" role="img" aria-label="coverage: 87%"><title>coverage: 87%</title><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="96" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#r)"><rect width="61" height="20" fill="#555"/><rect x="61" width="35" height="20" fill="#fe7d37"/><rect width="96" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><text aria-hidden="true" x="315" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="510">coverage</text><text x="315" y="140" transform="scale(.1)" fill="#fff" textLength="510">coverage</text><text aria-hidden="true" x="775" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="250">87%</text><text x="775" y="140" transform="scale(.1)" fill="#fff" textLength="250">87%</text></g></svg>