diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 8564b01..9678717 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -37,8 +37,10 @@ jobs:
         with:
           version: "v1.59"
       - run: "go test -v -race -coverprofile=coverage.txt -covermode=atomic ./netpunchlib/..."
+      - run: "grep -v netpunchlib/internal/mock/connection.go coverage.txt >coverage-clean.txt"
+      - run: "rm coverage.txt" # otherwise it will be taken into account
       - uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }} # required
-          files: ./coverage.txt
+          files: ./coverage-clean.txt
           verbose: true
diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..fe19d2f
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,8 @@
+# do not forget to validate it
+# curl --data-binary @codecov.yml https://codecov.io/validate
+
+comment: off
+coverage:
+  precision: 2
+  range: [50, 75]
+  round: up