diff --git a/.github/workflows/regression.yml b/.github/workflows/regression.yml
index 7588613b8..dc3a78d8d 100644
--- a/.github/workflows/regression.yml
+++ b/.github/workflows/regression.yml
@@ -52,23 +52,27 @@ jobs:
         if: ${{ matrix.go-version == '1.22.x' }}
         with:
           files: build/coverage.txt
-          flags: default+${{ matrix.build-flag }}
+          flags: default,${{ matrix.build-flag }}
+          token: ${{ secrets.CODECOV_TOKEN }}   
       - name: "Codecov: Examples"
         uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # v4
         if: ${{ matrix.go-version == '1.22.x' }}
         with:
           files: build/coverage-examples.txt
           flags: examples+${{ matrix.build-flag }}
+          token: ${{ secrets.CODECOV_TOKEN }}
       - name: "Codecov: FTW"
         uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # v4
         if: ${{ matrix.go-version == '1.22.x' }}
         with:
           files: build/coverage-ftw.txt
-          flags: ftw+${{ matrix.build-flag }}
+          flags: ftw,${{ matrix.build-flag }}
+          token: ${{ secrets.CODECOV_TOKEN }}
       - name: "Codecov: Tinygo"
         uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # v4
         # only if coverage-tinygo.txt exists
         if: ${{ matrix.go-version == '1.22.x' && hashFiles('build/coverage-tinygo.txt') != '' }}
         with:
           files: build/coverage-tinygo.txt
-          flags: tinygo+${{ matrix.build-flag }}
+          flags: tinygo,${{ matrix.build-flag }}
+          token: ${{ secrets.CODECOV_TOKEN }}