fix tests for correct coverage on internal packages

Author: ndyakov

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Install dependencies
       run: go mod tidy
     - name: Run tests with coverage
-      run: go test ./... -coverprofile=./cover.out -covermode=atomic -coverpkg=./...
+      run: go test ./... -coverprofile=./cover.out -covermode=atomic
     - name: Upload coverage
       uses: actions/upload-artifact@v4
       with: