diff --git a/src/main/java/postman/bottler/config/FcmConfig.java b/src/main/java/postman/bottler/config/FcmConfig.java
index e9b84b66..2c20aac0 100644
--- a/src/main/java/postman/bottler/config/FcmConfig.java
+++ b/src/main/java/postman/bottler/config/FcmConfig.java
@@ -7,6 +7,7 @@
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Arrays;
 import java.util.Base64;
 import javax.annotation.PostConstruct;
 import org.springframework.beans.factory.annotation.Value;
@@ -21,8 +22,11 @@ public class FcmConfig {
     public void init() {
         try {
             // JSON 문자열을 InputStream으로 변환
+            System.out.println("privateKey: " + privateKey);
             byte[] decodedBytes = Base64.getDecoder().decode(privateKey);
+            System.out.println("decodedBytes = " + Arrays.toString(decodedBytes));
             InputStream serviceAccount = new ByteArrayInputStream(decodedBytes);
+            System.out.println("serviceAccount = " + serviceAccount.getClass());
 
             FirebaseOptions options = new FirebaseOptions.Builder()
                     .setCredentials(GoogleCredentials.fromStream(serviceAccount))
diff --git a/src/test/resources/application.yml b/src/test/resources/application.yml
index e50da39f..1f584dce 100644
--- a/src/test/resources/application.yml
+++ b/src/test/resources/application.yml
@@ -11,4 +11,4 @@ spring:
     database-platform: org.hibernate.dialect.H2Dialect
 
 fcm:
-  private-key: bottler-fcm.json
+  private-key: ${BOTTLER_FCM}