diff --git a/.forge/BAIS-CTX-1783821073-attempt-3.md b/.forge/BAIS-CTX-1783821073-attempt-4.md
similarity index 63%
rename from .forge/BAIS-CTX-1783821073-attempt-3.md
rename to .forge/BAIS-CTX-1783821073-attempt-4.md
index 3a2b987..27c880c 100644
--- a/.forge/BAIS-CTX-1783821073-attempt-3.md
+++ b/.forge/BAIS-CTX-1783821073-attempt-4.md
@@ -1,3 +1,3 @@
-# BAIS-CTX-1783821073-attempt-3
+# BAIS-CTX-1783821073-attempt-4
 
-Forge 이슈 작업 브랜치 `forge/BAIS-CTX-1783821073-attempt-3`.
+Forge 이슈 작업 브랜치 `forge/BAIS-CTX-1783821073-attempt-4`.
diff --git a/pom.xml b/pom.xml
index c243b47..d025c7b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,11 +1,15 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
     <modelVersion>4.0.0</modelVersion>
+
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
         <version>3.5.14</version>
     </parent>
+
     <groupId>com.klaro.bais</groupId>
     <artifactId>bais-platform</artifactId>
     <version>1.0-SNAPSHOT</version>
@@ -14,4 +18,5 @@
     <modules>
         <module>services/payments</module>
     </modules>
-</project>
+
+</project>
\ No newline at end of file
diff --git a/services/payments/pom.xml b/services/payments/pom.xml
index 223f36a..f4d20af 100644
--- a/services/payments/pom.xml
+++ b/services/payments/pom.xml
@@ -1,12 +1,16 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
     <modelVersion>4.0.0</modelVersion>
+
     <parent>
         <groupId>com.klaro.bais</groupId>
         <artifactId>bais-platform</artifactId>
         <version>1.0-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
+
     <artifactId>payments</artifactId>
     <dependencies>
         <dependency>
@@ -17,7 +21,9 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
+            <version>3.5.14</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
+
 </project>
\ No newline at end of file
diff --git a/services/payments/src/main/java/com/klaro/bais/payments/PaymentReferenceService.java b/services/payments/src/main/java/com/klaro/bais/payments/PaymentReferenceService.java
index 6dc5371..a349b69 100644
--- a/services/payments/src/main/java/com/klaro/bais/payments/PaymentReferenceService.java
+++ b/services/payments/src/main/java/com/klaro/bais/payments/PaymentReferenceService.java
@@ -3,7 +3,6 @@ package com.klaro.bais.payments;
 import org.apache.commons.lang3.StringUtils;
 
 public class PaymentReferenceService {
-
     public String normalize(String input) {
         return StringUtils.trimToEmpty(input);
     }
diff --git a/services/payments/src/test/java/com/klaro/bais/payments/PaymentReferenceServiceTest.java b/services/payments/src/test/java/com/klaro/bais/payments/PaymentReferenceServiceTest.java
index 3f9ff38..b363d79 100644
--- a/services/payments/src/test/java/com/klaro/bais/payments/PaymentReferenceServiceTest.java
+++ b/services/payments/src/test/java/com/klaro/bais/payments/PaymentReferenceServiceTest.java
@@ -13,12 +13,12 @@ class PaymentReferenceServiceTest {
     }
 
     @Test
-    void testNormalizeWhitespace() {
+    void testNormalizeEmpty() {
         assertEquals("", service.normalize("  "));
     }
 
     @Test
-    void testNormalizeString() {
-        assertEquals("test", service.normalize(" test "));
+    void testNormalizeNormalString() {
+        assertEquals("test", service.normalize("  test  "));
     }
 }
\ No newline at end of file