diff --git a/core-java-modules/core-java-exceptions/pom.xml b/core-java-modules/core-java-exceptions/pom.xml
index 60c5e2650a..0778b6b5a3 100644
--- a/core-java-modules/core-java-exceptions/pom.xml
+++ b/core-java-modules/core-java-exceptions/pom.xml
@@ -29,6 +29,11 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons.lang3.version}</version>
+        </dependency>
         <!-- test scoped -->
         <dependency>
             <groupId>org.assertj</groupId>
@@ -40,6 +45,7 @@
 
     <properties>
         <javax.mail.version>1.5.0-b01</javax.mail.version>
+        <commons.lang3.version>3.10</commons.lang3.version>
         <!-- testing -->
         <assertj-core.version>3.10.0</assertj-core.version>
     </properties>
diff --git a/core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/rootcausefinder/RootCauseFinderUnitTest.java b/core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/rootcausefinder/RootCauseFinderUnitTest.java
index f963f23712..f42388857a 100644
--- a/core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/rootcausefinder/RootCauseFinderUnitTest.java
+++ b/core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/rootcausefinder/RootCauseFinderUnitTest.java
@@ -1,5 +1,7 @@
 package com.baeldung.exceptions.rootcausefinder;
 
+import com.baeldung.exceptions.rootcausefinder.RootCauseFinder.CalculationException;
+import com.baeldung.exceptions.rootcausefinder.RootCauseFinder.DateOutOfRangeException;
 import com.google.common.base.Throwables;
 import org.apache.commons.lang3.exception.ExceptionUtils;
 import org.junit.jupiter.api.Assertions;
@@ -9,7 +11,8 @@ import java.time.LocalDate;
 import java.time.format.DateTimeParseException;
 import java.time.temporal.ChronoUnit;
 
-import static com.baeldung.exceptions.RootCauseFinder.*;
+import static com.baeldung.exceptions.rootcausefinder.RootCauseFinder.AgeCalculator;
+import static com.baeldung.exceptions.rootcausefinder.RootCauseFinder.findCauseUsingPlainJava;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 /**