diff --git a/p1/src/main/java/cs448/project1.java b/p1/src/main/java/cs448/project1.java
index 98f59d0..dce7fdf 100644
--- a/p1/src/main/java/cs448/project1.java
+++ b/p1/src/main/java/cs448/project1.java
@@ -104,6 +104,8 @@ public class project1 {
     }
 
     String select_mapdb(String key){
-        return mapdb.get(key);
+        String result = mapdb.get(key);
+        // db.close();
+        return result;
     }
 }
diff --git a/p1/test b/p1/test
index 423a273..ca70c67 100755
--- a/p1/test
+++ b/p1/test
@@ -32,12 +32,18 @@ testCase $data_30 $mem nm0438120
 
 rm ./data.db
 testCase $data_10 $db nm0000001
+rm ./data.db
 testCase $data_10 $db nm0028516
+rm ./data.db
 testCase $data_10 $db nm0072686
+rm ./data.db
 testCase $data_10 $db nm0438120
 
 rm ./data.db
 testCase $data_30 $db nm0000001
+rm ./data.db
 testCase $data_30 $db nm0028516
+rm ./data.db
 testCase $data_30 $db nm0072686
+rm ./data.db
 testCase $data_30 $db nm0438120