diff --git a/httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/TestProtocolRequirements.java b/httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/TestProtocolRequirements.java
index 460581aed..25d52ea9e 100644
--- a/httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/TestProtocolRequirements.java
+++ b/httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/TestProtocolRequirements.java
@@ -29,6 +29,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.SocketTimeoutException;
+import java.util.Arrays;
 import java.util.Date;
 import java.util.Iterator;
 import java.util.Random;
@@ -1380,9 +1381,7 @@ public void test206ResponseIsNotCombinedWithPreviousContentIfETagDoesNotMatch()
         resp1.setHeader("Cache-Control", "max-age=3600");
         resp1.setHeader("ETag", "\"etag1\"");
         final byte[] bytes1 = new byte[128];
-        for (int i = 0; i < bytes1.length; i++) {
-            bytes1[i] = (byte) 1;
-        }
+        Arrays.fill(bytes1, (byte) 1);
         resp1.setEntity(new ByteArrayEntity(bytes1, null));
 
         final ClassicHttpRequest req2 = new BasicClassicHttpRequest("GET", "/");
@@ -1397,9 +1396,7 @@ public void test206ResponseIsNotCombinedWithPreviousContentIfETagDoesNotMatch()
         resp2.setHeader("ETag", "\"etag2\"");
         resp2.setHeader("Content-Range", "bytes 0-50/128");
         final byte[] bytes2 = new byte[51];
-        for (int i = 0; i < bytes2.length; i++) {
-            bytes2[i] = (byte) 2;
-        }
+        Arrays.fill(bytes2, (byte) 2);
         resp2.setEntity(new ByteArrayEntity(bytes2, null));
 
         final Date inTwoSeconds = new Date(now.getTime() + 2000L);
@@ -1409,9 +1406,7 @@ public void test206ResponseIsNotCombinedWithPreviousContentIfETagDoesNotMatch()
         resp3.setHeader("Cache-Control", "max-age=3600");
         resp3.setHeader("ETag", "\"etag2\"");
         final byte[] bytes3 = new byte[128];
-        for (int i = 0; i < bytes3.length; i++) {
-            bytes3[i] = (byte) 2;
-        }
+        Arrays.fill(bytes3, (byte) 2);
         resp3.setEntity(new ByteArrayEntity(bytes3, null));
 
         EasyMock.expect(
@@ -1461,9 +1456,7 @@ public void test206ResponseIsNotCombinedWithPreviousContentIfLastModifiedDoesNot
         resp1.setHeader("Cache-Control", "max-age=3600");
         resp1.setHeader("Last-Modified", DateUtils.formatDate(oneHourAgo));
         final byte[] bytes1 = new byte[128];
-        for (int i = 0; i < bytes1.length; i++) {
-            bytes1[i] = (byte) 1;
-        }
+        Arrays.fill(bytes1, (byte) 1);
         resp1.setEntity(new ByteArrayEntity(bytes1, null));
 
         final ClassicHttpRequest req2 = new BasicClassicHttpRequest("GET", "/");
@@ -1478,9 +1471,7 @@ public void test206ResponseIsNotCombinedWithPreviousContentIfLastModifiedDoesNot
         resp2.setHeader("Last-Modified", DateUtils.formatDate(now));
         resp2.setHeader("Content-Range", "bytes 0-50/128");
         final byte[] bytes2 = new byte[51];
-        for (int i = 0; i < bytes2.length; i++) {
-            bytes2[i] = (byte) 2;
-        }
+        Arrays.fill(bytes2, (byte) 2);
         resp2.setEntity(new ByteArrayEntity(bytes2, null));
 
         final Date inTwoSeconds = new Date(now.getTime() + 2000L);
@@ -1490,9 +1481,7 @@ public void test206ResponseIsNotCombinedWithPreviousContentIfLastModifiedDoesNot
         resp3.setHeader("Cache-Control", "max-age=3600");
         resp3.setHeader("ETag", "\"etag2\"");
         final byte[] bytes3 = new byte[128];
-        for (int i = 0; i < bytes3.length; i++) {
-            bytes3[i] = (byte) 2;
-        }
+        Arrays.fill(bytes3, (byte) 2);
         resp3.setEntity(new ByteArrayEntity(bytes3, null));
 
         EasyMock.expect(