diff --git a/modules/ingest-common/src/test/java/org/opensearch/ingest/common/BytesProcessorTests.java b/modules/ingest-common/src/test/java/org/opensearch/ingest/common/BytesProcessorTests.java
index bbd9ff4c8b912..385d77418ee7b 100644
--- a/modules/ingest-common/src/test/java/org/opensearch/ingest/common/BytesProcessorTests.java
+++ b/modules/ingest-common/src/test/java/org/opensearch/ingest/common/BytesProcessorTests.java
@@ -33,6 +33,7 @@
 package org.opensearch.ingest.common;
 
 import org.opensearch.OpenSearchException;
+import org.opensearch.OpenSearchParseException;
 import org.opensearch.common.unit.ByteSizeUnit;
 import org.opensearch.common.unit.ByteSizeValue;
 import org.opensearch.ingest.IngestDocument;
@@ -40,8 +41,6 @@
 import org.opensearch.ingest.RandomDocumentPicks;
 import org.hamcrest.CoreMatchers;
 
-import static org.hamcrest.Matchers.equalTo;
-
 public class BytesProcessorTests extends AbstractStringProcessorTestCase<Long> {
 
     private String modifiedInput;
@@ -101,14 +100,16 @@ public void testMissingUnits() {
         assertThat(exception.getMessage(), CoreMatchers.containsString("unit is missing or unrecognized"));
     }
 
-    public void testFractional() throws Exception {
+    public void testFractional() {
         IngestDocument ingestDocument = RandomDocumentPicks.randomIngestDocument(random());
         String fieldName = RandomDocumentPicks.addRandomField(random(), ingestDocument, "1.1kb");
         Processor processor = newProcessor(fieldName, randomBoolean(), fieldName);
-        processor.execute(ingestDocument);
-        assertThat(ingestDocument.getFieldValue(fieldName, expectedResultType()), equalTo(1126L));
-        assertWarnings(
-            "Fractional bytes values are deprecated. Use non-fractional bytes values instead: [1.1kb] found for setting " + "[Ingest Field]"
+        OpenSearchParseException e = expectThrows(OpenSearchParseException.class, () -> processor.execute(ingestDocument));
+        assertThat(
+            e.getMessage(),
+            CoreMatchers.containsString(
+                "Fractional bytes values have been deprecated since Legacy 6.2. " + "Use non-fractional bytes values instead:"
+            )
         );
     }
 }