diff --git a/core-java-modules/core-java-lang-syntax/src/test/java/com/baeldung/varargs/HeapPollutionUnitTest.java b/core-java-modules/core-java-lang-syntax/src/test/java/com/baeldung/varargs/HeapPollutionUnitTest.java
new file mode 100644
index 0000000000..ced2c00bea
--- /dev/null
+++ b/core-java-modules/core-java-lang-syntax/src/test/java/com/baeldung/varargs/HeapPollutionUnitTest.java
@@ -0,0 +1,40 @@
+package com.baeldung.varargs;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+public class HeapPollutionUnitTest {
+
+    @Test(expected = ClassCastException.class)
+    public void givenGenericVararg_whenUsedUnsafe_shouldThrowClassCastException() {
+        String one = firstOfFirst(Arrays.asList("one", "two"), Collections.emptyList());
+
+        assertEquals("one", one);
+    }
+
+    @Test(expected = ClassCastException.class)
+    public void givenGenericVararg_whenRefEscapes_mayCauseSubtleBugs() {
+        String[] args = returnAsIs("One", "Two");
+    }
+
+    private static String firstOfFirst(List<String>... strings) {
+        List<Integer> ints = Collections.singletonList(42);
+        Object[] objects = strings;
+        objects[0] = ints;
+
+        return strings[0].get(0);
+    }
+
+    private static <T> T[] toArray(T... arguments) {
+        return arguments;
+    }
+
+    private static <T> T[] returnAsIs(T a, T b) {
+        return toArray(a, b);
+    }
+}
diff --git a/core-java-modules/core-java-reflection/src/test/java/com/baeldung/reflection/java/reflection/ReflectionUnitTest.java b/core-java-modules/core-java-reflection/src/test/java/com/baeldung/reflection/java/reflection/ReflectionUnitTest.java
index 0c090901e7..a791d64874 100644
--- a/core-java-modules/core-java-reflection/src/test/java/com/baeldung/reflection/java/reflection/ReflectionUnitTest.java
+++ b/core-java-modules/core-java-reflection/src/test/java/com/baeldung/reflection/java/reflection/ReflectionUnitTest.java
@@ -200,7 +200,7 @@ public class ReflectionUnitTest {
     @Test
     public void givenClassField_whenSetsAndGetsValue_thenCorrect() throws Exception {
         final Class<?> birdClass = Class.forName("com.baeldung.java.reflection.Bird");
-        final Bird bird = (Bird) birdClass.newInstance();
+        final Bird bird = (Bird) birdClass.getConstructor().newInstance();
         final Field field = birdClass.getDeclaredField("walks");
         field.setAccessible(true);
 
@@ -266,7 +266,7 @@ public class ReflectionUnitTest {
     @Test
     public void givenMethod_whenInvokes_thenCorrect() throws Exception {
         final Class<?> birdClass = Class.forName("com.baeldung.java.reflection.Bird");
-        final Bird bird = (Bird) birdClass.newInstance();
+        final Bird bird = (Bird) birdClass.getConstructor().newInstance();
         final Method setWalksMethod = birdClass.getDeclaredMethod("setWalks", boolean.class);
         final Method walksMethod = birdClass.getDeclaredMethod("walks");
         final boolean walks = (boolean) walksMethod.invoke(bird);
diff --git a/core-java-modules/core-java-string-conversions/src/test/java/com/baeldung/stringtoint/StringToIntOrIntegerUnitTest.java b/core-java-modules/core-java-string-conversions/src/test/java/com/baeldung/stringtoint/StringToIntOrIntegerUnitTest.java
index 106f1fc974..336b2ac324 100644
--- a/core-java-modules/core-java-string-conversions/src/test/java/com/baeldung/stringtoint/StringToIntOrIntegerUnitTest.java
+++ b/core-java-modules/core-java-string-conversions/src/test/java/com/baeldung/stringtoint/StringToIntOrIntegerUnitTest.java
@@ -26,6 +26,17 @@ public class StringToIntOrIntegerUnitTest {
         assertThat(result).isEqualTo(new Integer(42));
     }
 
+    @Test
+    public void givenString_whenCallingValueOf_shouldCacheSomeValues() {
+        for (int i = -128; i <= 127; i++) {
+            String value = i + "";
+            Integer first = Integer.valueOf(value);
+            Integer second = Integer.valueOf(value);
+
+            assertThat(first).isSameAs(second);
+        }
+    }
+
     @Test
     public void givenString_whenCallingIntegerConstructor_shouldConvertToInt() {
         String givenString = "42";
diff --git a/jhipster-5/bookstore-monolith/pom.xml b/jhipster-5/bookstore-monolith/pom.xml
index 233765e0f3..4e4c82f327 100644
--- a/jhipster-5/bookstore-monolith/pom.xml
+++ b/jhipster-5/bookstore-monolith/pom.xml
@@ -225,6 +225,12 @@
             <groupId>io.dropwizard.metrics</groupId>
             <artifactId>metrics-core</artifactId>
         </dependency>
+        <dependency>
+            <groupId>net.bytebuddy</groupId>
+            <artifactId>byte-buddy</artifactId>
+            <version>${byte-buddy.version}</version>
+            <scope>test</scope>
+        </dependency>
         <!-- jhipster-needle-maven-add-dependency -->
     </dependencies>
 
diff --git a/libraries-data-2/pom.xml b/libraries-data-2/pom.xml
index 2d27ec2107..ac23747caa 100644
--- a/libraries-data-2/pom.xml
+++ b/libraries-data-2/pom.xml
@@ -153,7 +153,13 @@
             <artifactId>renjin-script-engine</artifactId>
             <version>${renjin.version}</version>
         </dependency>
-         <dependency>
+        <dependency>
+            <groupId>net.bytebuddy</groupId>
+            <artifactId>byte-buddy</artifactId>
+            <version>${byte-buddy.version}</version>
+        <scope>test</scope>
+        </dependency>
+        <dependency>
             <groupId>org.apache.kafka</groupId>
             <artifactId>kafka-clients</artifactId>
             <version>${kafka.version}</version>
diff --git a/parent-boot-2/pom.xml b/parent-boot-2/pom.xml
index 631d8a0581..c7bb11b1d5 100644
--- a/parent-boot-2/pom.xml
+++ b/parent-boot-2/pom.xml
@@ -32,11 +32,6 @@
             <groupId>io.rest-assured</groupId>
             <artifactId>rest-assured</artifactId>
         </dependency>
-        <dependency>
-            <groupId>net.bytebuddy</groupId>
-            <artifactId>byte-buddy</artifactId>
-            <version>${byte-buddy.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
diff --git a/pom.xml b/pom.xml
index f797f1bbce..20adc4bfef 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,12 +69,6 @@
             <version>${hamcrest-all.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>net.bytebuddy</groupId>
-            <artifactId>byte-buddy</artifactId>
-            <version>${byte-buddy.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>