diff --git a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokProcessor.java b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokProcessor.java
index 46d937598f4..6541ecff2e1 100644
--- a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokProcessor.java
+++ b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokProcessor.java
@@ -23,7 +23,11 @@ import org.elasticsearch.ingest.IngestDocument;
 import org.elasticsearch.ingest.processor.ConfigurationUtils;
 import org.elasticsearch.ingest.processor.Processor;
 
+import java.io.BufferedReader;
+import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.DirectoryStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -75,6 +79,22 @@ public final class GrokProcessor implements Processor {
             this.grokConfigDirectory = configDirectory.resolve("ingest").resolve("grok");
         }
 
+        static void loadBankFromStream(Map<String, String> patternBank, InputStream inputStream) throws IOException {
+            String line;
+            BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
+            while ((line = br.readLine()) != null) {
+                String trimmedLine = line.replaceAll("^\\s+", "");
+                if (trimmedLine.startsWith("#") || trimmedLine.length() == 0) {
+                    continue;
+                }
+
+                String[] parts = trimmedLine.split("\\s+", 2);
+                if (parts.length == 2) {
+                    patternBank.put(parts[0], parts[1]);
+                }
+            }
+        }
+
         public GrokProcessor create(Map<String, Object> config) throws Exception {
             String matchField = ConfigurationUtils.readStringProperty(config, "field");
             String matchPattern = ConfigurationUtils.readStringProperty(config, "pattern");
@@ -84,7 +104,7 @@ public final class GrokProcessor implements Processor {
                 for (Path patternFilePath : stream) {
                     if (Files.isRegularFile(patternFilePath)) {
                         try(InputStream is = Files.newInputStream(patternFilePath, StandardOpenOption.READ)) {
-                            PatternUtils.loadBankFromStream(patternBank, is);
+                            loadBankFromStream(patternBank, is);
                         }
                     }
                 }
diff --git a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/PatternUtils.java b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/PatternUtils.java
deleted file mode 100644
index 05b291d4ea6..00000000000
--- a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/PatternUtils.java
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.elasticsearch.ingest.processor.grok;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.nio.charset.StandardCharsets;
-import java.util.Map;
-
-final class PatternUtils {
-    private PatternUtils() {}
-
-    public static void loadBankFromStream(Map<String, String> patternBank, InputStream inputStream) throws IOException {
-        String line;
-        BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
-        while ((line = br.readLine()) != null) {
-            String trimmedLine = line.replaceAll("^\\s+", "");
-            if (trimmedLine.startsWith("#") || trimmedLine.length() == 0) {
-                continue;
-            }
-
-            String[] parts = trimmedLine.split("\\s+", 2);
-            if (parts.length == 2) {
-                patternBank.put(parts[0], parts[1]);
-            }
-        }
-    }
-
-}
diff --git a/plugins/ingest/src/test/java/org/elasticsearch/ingest/processor/grok/GrokTests.java b/plugins/ingest/src/test/java/org/elasticsearch/ingest/processor/grok/GrokTests.java
index 5632ba489a7..b73a8e0030b 100644
--- a/plugins/ingest/src/test/java/org/elasticsearch/ingest/processor/grok/GrokTests.java
+++ b/plugins/ingest/src/test/java/org/elasticsearch/ingest/processor/grok/GrokTests.java
@@ -40,7 +40,7 @@ public class GrokTests extends ESTestCase {
         Map<String, String> patternBank = new HashMap<>();
 
         for (InputStream is : inputStreams) {
-            PatternUtils.loadBankFromStream(patternBank, is);
+            GrokProcessor.Factory.loadBankFromStream(patternBank, is);
         }
 
         return patternBank;