diff --git a/testkit/src/mill/testkit/IntegrationTester.scala b/testkit/src/mill/testkit/IntegrationTester.scala
index 9774c770629..c60a0a27a91 100644
--- a/testkit/src/mill/testkit/IntegrationTester.scala
+++ b/testkit/src/mill/testkit/IntegrationTester.scala
@@ -48,8 +48,10 @@ object IntegrationTester {
      * Mill build being tested. Contains the `build.sc` file, any application code, and
      * the `out/` folder containing the build output
      */
-    val workspacePath: os.Path = os.temp.dir(deleteOnExit = false)
+    val workspacePath: os.Path = os.pwd / "out" / "interation-tester-workdir"
 
+    os.remove.all(workspacePath)
+    os.makeDir.all(workspacePath)
     def debugLog = false
 
     /**