diff --git a/core-java-modules/core-java-string-algorithms-3/pom.xml b/core-java-modules/core-java-string-algorithms-3/pom.xml
index 6700e9ba95..180d75cc61 100644
--- a/core-java-modules/core-java-string-algorithms-3/pom.xml
+++ b/core-java-modules/core-java-string-algorithms-3/pom.xml
@@ -24,6 +24,11 @@
             <artifactId>commons-validator</artifactId>
             <version>${validator.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -49,8 +54,8 @@
     </build>
 
     <properties>
-        <guava.version>28.1-jre</guava.version>
+        <guava.version>31.0.1-jre</guava.version>
         <validator.version>1.7</validator.version>
     </properties>
 
-</project>
\ No newline at end of file
+</project>
diff --git a/core-java-modules/core-java-string-algorithms-2/src/test/java/com/baeldung/isuppercase/StringFirstCharacterUppercase.java b/core-java-modules/core-java-string-algorithms-3/src/test/java/com/baeldung/isuppercase/StringFirstCharacterUppercaseUnitTest.java
similarity index 94%
rename from core-java-modules/core-java-string-algorithms-2/src/test/java/com/baeldung/isuppercase/StringFirstCharacterUppercase.java
rename to core-java-modules/core-java-string-algorithms-3/src/test/java/com/baeldung/isuppercase/StringFirstCharacterUppercaseUnitTest.java
index 0d9d3b6431..6803285ca2 100644
--- a/core-java-modules/core-java-string-algorithms-2/src/test/java/com/baeldung/isuppercase/StringFirstCharacterUppercase.java
+++ b/core-java-modules/core-java-string-algorithms-3/src/test/java/com/baeldung/isuppercase/StringFirstCharacterUppercaseUnitTest.java
@@ -1,15 +1,15 @@
 package com.baeldung.isuppercase;
 
-import com.google.common.base.Ascii;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestInstance;
+import com.google.common.base.Ascii;
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.matchesPattern;
 
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
-public class StringFirstCharacterUppercase {
+public class StringFirstCharacterUppercaseUnitTest {
 
     @Test
     public void givenString_whenCheckingWithCharacterIsUpperCase_thenStringCapitalized() {
diff --git a/spring-boot-modules/spring-boot-swagger/pom.xml b/spring-boot-modules/spring-boot-swagger/pom.xml
index 87ee5f04cb..d6b62bce3c 100644
--- a/spring-boot-modules/spring-boot-swagger/pom.xml
+++ b/spring-boot-modules/spring-boot-swagger/pom.xml
@@ -40,4 +40,4 @@
         <springfox.version>3.0.0</springfox.version>
     </properties>
 
-</project>
\ No newline at end of file
+</project>