diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 67518a44..9deb8b86 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,7 @@ jobs:
       - uses: olafurpg/setup-scala@v14
         with:
           java-version: 17
-      - run: sbt "test; scripted sbt-scalafix/*"
+      - run: sbt "test; scripted sbt-*/* skip-windows/*"
   jdk21:
     name: JDK21 tests
     runs-on: ubuntu-latest
@@ -40,7 +40,7 @@ jobs:
       - uses: olafurpg/setup-scala@v14
         with:
           java-version: 21
-      - run: sbt "test; scripted sbt-scalafix/*"
+      - run: sbt "test; scripted sbt-*/* skip-windows/*"
   windows:
     name: Windows tests
     runs-on: windows-latest
diff --git a/src/sbt-test/skip-windows/caching/test b/src/sbt-test/skip-windows/caching/test
index 4a7e7b36..cf4965ce 100644
--- a/src/sbt-test/skip-windows/caching/test
+++ b/src/sbt-test/skip-windows/caching/test
@@ -1,3 +1,7 @@
+# make sure unmangaedSources does not silently exclude chmoded files on recent JDKs
+# (because of all input files are stamped with Hash by default)
+> set unmanagedSources / inputFileStamper := sbt.nio.FileStamper.LastModified
+
 # a re-run after a no-op, successful run should be cached
 > set scalafixConfig := Some(file("files/DisableSyntaxNull.scalafix.conf"))
 $ mkdir src/main/scala