diff --git a/platform/platform-tests/testSrc/com/intellij/openapi/application/impl/NonBlockingReadActionTest.java b/platform/platform-tests/testSrc/com/intellij/openapi/application/impl/NonBlockingReadActionTest.java
index cccf56e11e09..744b273cc0c0 100644
--- a/platform/platform-tests/testSrc/com/intellij/openapi/application/impl/NonBlockingReadActionTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/openapi/application/impl/NonBlockingReadActionTest.java
@@ -463,17 +463,22 @@ public class NonBlockingReadActionTest extends LightPlatformTestCase {
     for (int i = 0; i < 2; i++) {
       Disposable[] parents = {Disposer.newDisposable("1"), Disposer.newDisposable("2")};
       Disposer.dispose(parents[i]);
-      NonBlockingReadAction<String> nbra = ReadAction
-        .nonBlocking(() -> {
-          fail();
-          return "a";
-        });
-      for (Disposable parent : parents) {
-        nbra = nbra.expireWith(parent);
+      try {
+        NonBlockingReadAction<String> nbra = ReadAction
+          .nonBlocking(() -> {
+            fail();
+            return "a";
+          });
+        for (Disposable parent : parents) {
+          nbra = nbra.expireWith(parent);
+        }
+        CancellablePromise<String> promise = nbra.submit(AppExecutorUtil.getAppExecutorService());
+        assertTrue(promise.isCancelled());
+        assertNull(promise.get());
+      }
+      finally {
+        Disposer.dispose(parents[1 - i]);
       }
-      CancellablePromise<String> promise = nbra.submit(AppExecutorUtil.getAppExecutorService());
-      assertTrue(promise.isCancelled());
-      assertNull(promise.get());
     }
   }
 }