diff --git a/src/main/java/org/ntlab/nemophila/models/accounts/AccountManager.java b/src/main/java/org/ntlab/nemophila/models/accounts/AccountManager.java
index 09011ec..dd08f65 100644
--- a/src/main/java/org/ntlab/nemophila/models/accounts/AccountManager.java
+++ b/src/main/java/org/ntlab/nemophila/models/accounts/AccountManager.java
@@ -10,10 +10,10 @@
 
     private AccountManager() {
         //ダミーアカウントとの作成
-        createAccount(a,a);
-        createAccount(b,b);
-        createAccount(c,c);
-        createAccount(d,d);
+        this.createAccount("a","a");
+        this.createAccount("b","b");
+        this.createAccount("c","c");
+        this.createAccount("d","d");
     }
     //シングルトン化
     public static AccountManager getInstance() {