diff --git a/core-java-8/src/test/java/com/baeldung/file/FileOperationsTest.java b/core-java-8/src/test/java/com/baeldung/file/FileOperationsTest.java
index 12143c3c19..e21af9552a 100644
--- a/core-java-8/src/test/java/com/baeldung/file/FileOperationsTest.java
+++ b/core-java-8/src/test/java/com/baeldung/file/FileOperationsTest.java
@@ -102,6 +102,7 @@ public class FileOperationsTest {
         StringBuilder data = new StringBuilder();
         Stream<String> lines = Files.lines(path);
         lines.forEach(line -> data.append(line).append("\n"));
+        lines.close();
         
         Assert.assertEquals(expectedData, data.toString().trim());
     }