diff --git a/platform/platform-tests/testSrc/com/intellij/application/TransactionTest.groovy b/platform/platform-tests/testSrc/com/intellij/application/TransactionTest.groovy
index 128abf2aea82..fdac1d2044f8 100644
--- a/platform/platform-tests/testSrc/com/intellij/application/TransactionTest.groovy
+++ b/platform/platform-tests/testSrc/com/intellij/application/TransactionTest.groovy
@@ -26,6 +26,7 @@ class TransactionTest extends LightPlatformTestCase {
 
   @Override
   protected void setUp() throws Exception {
+    assert LaterInvocator.currentModalityState == ModalityState.NON_MODAL
     super.setUp()
     Registry.get("ide.require.transaction.for.model.changes").setValue(true)
     LoggedErrorProcessor.instance.disableStderrDumping(testRootDisposable)