diff --git a/.github/codecov.yml b/.github/codecov.yml
index 1d9d21f10..f8ee9b8d1 100644
--- a/.github/codecov.yml
+++ b/.github/codecov.yml
@@ -59,6 +59,7 @@ flags:
     carryforward: true
     paths:
       - KomaMRICore/src/.*
+      - KomaMRICore/ext/.*
   files:
     carryforward: true
     paths:
@@ -67,3 +68,4 @@ flags:
     carryforward: true
     paths:
       - KomaMRIPlots/src/.*
+      - KomaMRIPlots/ext/.*
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4cfc152ba..db70c556d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -133,7 +133,7 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }} # required
       - uses: julia-actions/julia-processcoverage@v1
         with:
-          directories: KomaMRICore/src
+          directories: KomaMRICore/src,KomaMRICore/ext
       - uses: codecov/codecov-action@v4
         with:
           files: lcov.info
@@ -141,7 +141,7 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }} # required
       - uses: julia-actions/julia-processcoverage@v1
         with:
-          directories: KomaMRIPlots/src
+          directories: KomaMRIPlots/src,KomaMRIPlots/ext
       - uses: codecov/codecov-action@v4
         with:
           files: lcov.info