diff --git a/platform/platform-tests/testSrc/com/intellij/openapi/application/impl/LaunchOnShowTest.kt b/platform/platform-tests/testSrc/com/intellij/openapi/application/impl/LaunchOnShowTest.kt
index 2ac3515426c3..4aaa0449ba02 100644
--- a/platform/platform-tests/testSrc/com/intellij/openapi/application/impl/LaunchOnShowTest.kt
+++ b/platform/platform-tests/testSrc/com/intellij/openapi/application/impl/LaunchOnShowTest.kt
@@ -5,6 +5,7 @@ import com.intellij.openapi.application.EDT
 import com.intellij.platform.ide.progress.ModalTaskOwner
 import com.intellij.platform.ide.progress.TaskCancellation
 import com.intellij.platform.ide.progress.withModalProgress
+import com.intellij.testFramework.PlatformTestUtil
 import com.intellij.testFramework.common.timeoutRunBlocking
 import com.intellij.testFramework.junit5.TestApplication
 import com.intellij.ui.ComponentUtil.forceMarkAsShowing
@@ -114,6 +115,24 @@ class LaunchOnShowTest {
     assertTrue(awaitValue(true) { executed })
   }
 
+  @Test
+  fun `launch works in a long-running unconfined EDT coroutine`(): Unit = edtTest {
+    var executed = false
+    withContext(Dispatchers.Unconfined) {
+      container.launchOnShow("test") {
+        executed = true
+      }
+      var eventuallyExecuted = false
+      // not using awaitValue because it's important to not let go of this unconfined thing,
+      // and therefore we must not suspend the coroutine
+      repeat(10) {
+        PlatformTestUtil.dispatchAllEventsInIdeEventQueue()
+        eventuallyExecuted = executed
+      }
+      assertTrue(eventuallyExecuted)
+    }
+  }
+
   @Test
   fun `launch once without adding it to hierarchy is GCed with component`(): Unit = edtTest {
     var component: Component? = JLabel()