diff --git a/.github/workflows/CompatHelper.yml b/.github/workflows/CompatHelper.yml
index 42d69db22..45ef05198 100644
--- a/.github/workflows/CompatHelper.yml
+++ b/.github/workflows/CompatHelper.yml
@@ -2,6 +2,9 @@ name: CompatHelper
 on:
   schedule:
     - cron: 0 0 * * *
+  pull_request:
+    branches:
+      - master
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -9,6 +12,6 @@ jobs:
       - name: Pkg.add("CompatHelper")
         run: julia -e 'using Pkg; Pkg.add("CompatHelper")'
       - name: CompatHelper.main()
-        run: julia -e 'using CompatHelper; CompatHelper.main(; subdirs=["", "KomaMRICore", "KomaMRIFiles", "KomaMRIPlots"])'
+        run: julia -e 'using CompatHelper; CompatHelper.main(; subdirs=["", "KomaMRIBase", "KomaMRICore", "KomaMRIFiles", "KomaMRIPlots"])'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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