diff --git a/compiler/test/dotty/tools/dotc/FromTastyTests.scala b/compiler/test/dotty/tools/dotc/FromTastyTests.scala
index fa1d9acff316..dd7fe64e50e4 100644
--- a/compiler/test/dotty/tools/dotc/FromTastyTests.scala
+++ b/compiler/test/dotty/tools/dotc/FromTastyTests.scala
@@ -22,7 +22,7 @@ class FromTastyTests {
     // > scalac -Ythrough-tasty -Ycheck:all <source>
 
     implicit val testGroup: TestGroup = TestGroup("posTestFromTasty")
-    compileTastyInDir(s"tests${JFile.separator}pos", defaultOptions,
+    compileTastyInDir(s"tests${JFile.separator}pos", defaultOptions.and("-experimental"),
       fromTastyFilter = FileFilter.exclude(TestSources.posFromTastyExcludelisted)
     ).checkCompile()
   }
@@ -34,7 +34,7 @@ class FromTastyTests {
     // > scala Test
 
     implicit val testGroup: TestGroup = TestGroup("runTestFromTasty")
-    compileTastyInDir(s"tests${JFile.separator}run", defaultOptions,
+    compileTastyInDir(s"tests${JFile.separator}run", defaultOptions.and("-experimental"),
       fromTastyFilter = FileFilter.exclude(TestSources.runFromTastyExcludelisted)
     ).checkRuns()
   }
diff --git a/compiler/test/dotty/tools/vulpix/ParallelTesting.scala b/compiler/test/dotty/tools/vulpix/ParallelTesting.scala
index 3a2f261a8e16..8e87f957ba74 100644
--- a/compiler/test/dotty/tools/vulpix/ParallelTesting.scala
+++ b/compiler/test/dotty/tools/vulpix/ParallelTesting.scala
@@ -1570,30 +1570,30 @@ trait ParallelTesting extends RunnerOrchestration:
     val sourceDir = new JFile(f)
     checkRequirements(f, sourceDir, outDir)
 
-    val (dirs, files) = compilationTargets(sourceDir, fromTastyFilter)
+    val (_, files) = compilationTargets(sourceDir, fromTastyFilter)
 
     val filteredFiles = testFilter match
       case _ :: _ => files.filter(f => testFilter.exists(f.getPath.contains))
-      case _      => Nil
+      case _      => files
+
+    assert(filteredFiles.nonEmpty)
 
     class JointCompilationSourceFromTasty(
        name: String,
        file: JFile,
        flags: TestFlags,
        outDir: JFile,
-       fromTasty: Boolean = false,
-    ) extends JointCompilationSource(name, Array(file), flags, outDir, if (fromTasty) FromTasty else NotFromTasty) {
+    ) extends JointCompilationSource(name, Array(file), flags, outDir, FromTasty) {
 
       override def buildInstructions(errors: Int, warnings: Int): String = {
         val runOrPos = if (file.getPath.startsWith(s"tests${JFile.separator}run${JFile.separator}")) "run" else "pos"
-        val listName = if (fromTasty) "from-tasty" else "decompilation"
         s"""|
             |Test '$title' compiled with $errors error(s) and $warnings warning(s),
             |the test can be reproduced by running:
             |
             |  sbt "testCompilation --from-tasty $file"
             |
-            |This tests can be disabled by adding `${file.getName}` to `compiler${JFile.separator}test${JFile.separator}dotc${JFile.separator}$runOrPos-$listName.excludelist`
+            |This tests can be disabled by adding `${file.getName}` to `compiler${JFile.separator}test${JFile.separator}dotc${JFile.separator}$runOrPos-from-tasty.excludelist`
             |
             |""".stripMargin
       }
@@ -1602,7 +1602,7 @@ trait ParallelTesting extends RunnerOrchestration:
 
     val targets = filteredFiles.map { f =>
       val classpath = createOutputDirsForFile(f, sourceDir, outDir)
-      new JointCompilationSourceFromTasty(testGroup.name, f, flags.withClasspath(classpath.getPath), classpath, fromTasty = true)
+      new JointCompilationSourceFromTasty(testGroup.name, f, flags.withClasspath(classpath.getPath), classpath)
     }
     // TODO add SeparateCompilationSource from tasty?