diff --git a/shadowsocks/utils.py b/shadowsocks/utils.py
index 66e0dd6..ed95443 100644
--- a/shadowsocks/utils.py
+++ b/shadowsocks/utils.py
@@ -73,6 +73,10 @@ def check_config(config):
     if config.get('timeout', 300) > 600:
         logging.warn('warning: your timeout %d seems too long' %
                      int(config.get('timeout')))
+    if config.get('password') in ['mypassword', 'barfoo!']:
+        logging.error('DON\'T USE DEFAULT PASSWORD! Please change it in your '
+                      'config.json!')
+        exit(1)
 
 
 def get_config(is_local):
diff --git a/tests/aes.json b/tests/aes.json
index 7c0f8f2..a3d95b9 100644
--- a/tests/aes.json
+++ b/tests/aes.json
@@ -2,7 +2,7 @@
     "server":"127.0.0.1",
     "server_port":8388,
     "local_port":1081,
-    "password":"barfoo!",
+    "password":"aes_password",
     "timeout":60,
     "method":"aes-256-cfb",
     "local_address":"127.0.0.1",
diff --git a/tests/fastopen.json b/tests/fastopen.json
index 82a9cb2..f3980b6 100644
--- a/tests/fastopen.json
+++ b/tests/fastopen.json
@@ -2,7 +2,7 @@
     "server":"127.0.0.1",
     "server_port":8388,
     "local_port":1081,
-    "password":"barfoo!",
+    "password":"fastopen_password",
     "timeout":60,
     "method":"aes-256-cfb",
     "local_address":"127.0.0.1",
diff --git a/tests/salsa20.json b/tests/salsa20.json
index af1d266..5ca6c45 100644
--- a/tests/salsa20.json
+++ b/tests/salsa20.json
@@ -2,7 +2,7 @@
     "server":"127.0.0.1",
     "server_port":8388,
     "local_port":1081,
-    "password":"barfoo!",
+    "password":"salsa20_password",
     "timeout":60,
     "method":"salsa20-ctr",
     "local_address":"127.0.0.1",
diff --git a/tests/table.json b/tests/table.json
index 21cff86..cca6ac2 100644
--- a/tests/table.json
+++ b/tests/table.json
@@ -2,7 +2,7 @@
     "server":"127.0.0.1",
     "server_port":8388,
     "local_port":1081,
-    "password":"barfoo!",
+    "password":"table_password",
     "timeout":60,
     "method":"table",
     "local_address":"127.0.0.1",
diff --git a/tests/workers.json b/tests/workers.json
index 35f3962..2015ff6 100644
--- a/tests/workers.json
+++ b/tests/workers.json
@@ -2,7 +2,7 @@
     "server":"127.0.0.1",
     "server_port":8388,
     "local_port":1081,
-    "password":"barfoo!",
+    "password":"workers_password",
     "timeout":60,
     "method":"aes-256-cfb",
     "local_address":"127.0.0.1",