diff --git a/compiler/src/dotty/tools/dotc/fromtasty/TASTYRun.scala b/compiler/src/dotty/tools/dotc/fromtasty/TASTYRun.scala
index 2d2d41ae50ed..1c8ba2359623 100644
--- a/compiler/src/dotty/tools/dotc/fromtasty/TASTYRun.scala
+++ b/compiler/src/dotty/tools/dotc/fromtasty/TASTYRun.scala
@@ -4,6 +4,7 @@ package fromtasty
 
 import io.{JarArchive, AbstractFile, Path}
 import core.Contexts._
+import java.io.File
 
 class TASTYRun(comp: Compiler, ictx: Context) extends Run(comp, ictx) {
   override def compile(files: List[AbstractFile]): Unit = {
@@ -17,9 +18,10 @@ class TASTYRun(comp: Compiler, ictx: Context) extends Run(comp, ictx) {
     val classNames = files.flatMap { file =>
       file.extension match
         case "jar" =>
-          JarArchive.open(Path(file.path), create = false).iterator()
-            .filter(e => e.extension == "tasty" && !fromTastyIgnoreList(e.name))
-            .map(e => e.name.stripSuffix(".tasty").replace("/", "."))
+          JarArchive.open(Path(file.path), create = false).allFileNames()
+            .map(_.stripPrefix(File.separator)) // change paths from absolute to relative
+            .filter(e => Path.extension(e) == "tasty" && !fromTastyIgnoreList(e))
+            .map(e => e.stripSuffix(".tasty").replace(File.separator, "."))
             .toList
         case "tasty" => TastyFileUtil.getClassName(file)
         case _ =>
diff --git a/compiler/src/dotty/tools/io/JarArchive.scala b/compiler/src/dotty/tools/io/JarArchive.scala
index f35493299cd6..80af5ef390b5 100644
--- a/compiler/src/dotty/tools/io/JarArchive.scala
+++ b/compiler/src/dotty/tools/io/JarArchive.scala
@@ -10,6 +10,8 @@ import scala.jdk.CollectionConverters._
  */
 class JarArchive private (root: Directory) extends PlainDirectory(root) {
   def close(): Unit = jpath.getFileSystem().close()
+  def allFileNames(): Iterator[String] = 
+    java.nio.file.Files.walk(jpath).iterator().asScala.map(_.toString)
 }
 
 object JarArchive {
diff --git a/sbt-test/sbt-dotty/tasty-inspector-jars/build.sbt b/sbt-test/sbt-dotty/tasty-inspector-jars/build.sbt
new file mode 100644
index 000000000000..59dd85290bf0
--- /dev/null
+++ b/sbt-test/sbt-dotty/tasty-inspector-jars/build.sbt
@@ -0,0 +1,24 @@
+lazy val dottyVersion = sys.props("plugin.scalaVersion")
+
+lazy val lib = project
+  .in(file("lib"))
+  .settings(
+    scalaVersion := dottyVersion
+  )
+
+val jarDest = file("target") / "app.jar"
+
+val runTest = Def.taskKey[Unit]("run tests")
+
+lazy val inspector = project
+  .in(file("inspector"))
+  .settings(
+    scalaVersion := dottyVersion,
+    libraryDependencies += "org.scala-lang" %% "scala3-tasty-inspector" % scalaVersion.value,
+    runTest := 
+      Def.sequential(
+        Def.task(IO.copyFile((lib/Compile/packageBin).value, jarDest)),
+        (Compile/run).toTask(" " + jarDest.getAbsolutePath)
+      ).value
+  )
+  .dependsOn(lib)
diff --git a/sbt-test/sbt-dotty/tasty-inspector-jars/inspector/src/main/scala/main.scala b/sbt-test/sbt-dotty/tasty-inspector-jars/inspector/src/main/scala/main.scala
new file mode 100644
index 000000000000..b27e9a59c66a
--- /dev/null
+++ b/sbt-test/sbt-dotty/tasty-inspector-jars/inspector/src/main/scala/main.scala
@@ -0,0 +1,12 @@
+import scala.quoted.Quotes
+import scala.quoted.quotes
+import scala.tasty.inspector as ins
+
+class MyInspector extends ins.Inspector:
+  def inspect(using Quotes)(tastys: List[ins.Tasty[quotes.type]]): Unit =
+    val sources = tastys.map(_.ast.pos.sourceFile.toString).toSet
+    val expectedSources = Set("lib/src/main/scala/toplevel.scala", "lib/src/main/scala/inpackage.scala")
+    assert(sources == expectedSources, s"expected $expectedSources tasty files but get: $sources")
+
+@main def main(args: String*): Unit =
+  ins.TastyInspector.inspectTastyFilesInJar(args.head)(new MyInspector)
diff --git a/sbt-test/sbt-dotty/tasty-inspector-jars/lib/src/main/scala/inpackage.scala b/sbt-test/sbt-dotty/tasty-inspector-jars/lib/src/main/scala/inpackage.scala
new file mode 100644
index 000000000000..82a15907dfad
--- /dev/null
+++ b/sbt-test/sbt-dotty/tasty-inspector-jars/lib/src/main/scala/inpackage.scala
@@ -0,0 +1,3 @@
+package pkg
+
+class A
diff --git a/sbt-test/sbt-dotty/tasty-inspector-jars/lib/src/main/scala/toplevel.scala b/sbt-test/sbt-dotty/tasty-inspector-jars/lib/src/main/scala/toplevel.scala
new file mode 100644
index 000000000000..337fa441878a
--- /dev/null
+++ b/sbt-test/sbt-dotty/tasty-inspector-jars/lib/src/main/scala/toplevel.scala
@@ -0,0 +1,3 @@
+// NOTE: no package, this is top-level!
+
+class A
diff --git a/sbt-test/sbt-dotty/tasty-inspector-jars/test b/sbt-test/sbt-dotty/tasty-inspector-jars/test
new file mode 100644
index 000000000000..8fa783e886e2
--- /dev/null
+++ b/sbt-test/sbt-dotty/tasty-inspector-jars/test
@@ -0,0 +1 @@
+> inspector/runTest