diff --git a/json/tests/test/com/jetbrains/jsonSchema/JsonSchemaHeavyAbstractTest.java b/json/tests/test/com/jetbrains/jsonSchema/JsonSchemaHeavyAbstractTest.java
index b5df3db902a6..36436b1eeee9 100644
--- a/json/tests/test/com/jetbrains/jsonSchema/JsonSchemaHeavyAbstractTest.java
+++ b/json/tests/test/com/jetbrains/jsonSchema/JsonSchemaHeavyAbstractTest.java
@@ -60,6 +60,7 @@ public abstract class JsonSchemaHeavyAbstractTest extends CompletionTestCase {
     callback.registerSchemes();
     JsonSchemaMappingsProjectConfiguration.getInstance(getProject()).setState(mySchemas);
     JsonSchemaService.Impl.get(getProject()).reset();
+    getPsiManager().dropPsiCaches();
     doHighlighting();
     if (myDoCompletion) complete();
     callback.doCheck();