diff --git a/jps/jps-builders/testSrc/org/jetbrains/ether/StorageDumper.java b/jps/jps-builders/testSrc/org/jetbrains/ether/StorageDumper.java
index bd7049c0a1ce..2105e1747168 100644
--- a/jps/jps-builders/testSrc/org/jetbrains/ether/StorageDumper.java
+++ b/jps/jps-builders/testSrc/org/jetbrains/ether/StorageDumper.java
@@ -134,6 +134,7 @@ public class StorageDumper {
         final PrintStream p = new PrintStream(outputPath);
 
         mappings.toStream(p);
+        mappings.close();
 
         p.close();
       }