diff --git a/main/lib/idds/tests/jsonload_test.py b/main/lib/idds/tests/jsonload_test.py
index 92192ac1..aee3ae68 100644
--- a/main/lib/idds/tests/jsonload_test.py
+++ b/main/lib/idds/tests/jsonload_test.py
@@ -20,18 +20,30 @@ def is_string(value):
 
 
 def as_parse_env(dct):
-    print(dct)
+    # print(dct)
     for key in dct:
         value = dct[key]
-        print(value)
-        print(type(value))
-        if is_string(value) and value.startswith('$'):
-            env_match = re.search('\$\{*([^\}]+)\}*', value)     # noqa W605
-            env_name = env_match.group(1)
-            if env_name not in os.environ:
-                print("Error: %s is defined in configmap but is not defined in environments" % env_name)
-            else:
-                dct[key] = os.environ[env_name]
+        # print(value)
+        # print(type(value))
+        if is_string(value) and '$' in value:
+            env_matchs = re.findall('\$\{*([^\}]+)\}*', value)     # noqa W605
+            print("env_matchs")
+            print(env_matchs)
+            for env_name in env_matchs:
+                print(env_name)
+                if env_name not in os.environ:
+                    print("Error: %s is defined in configmap but is not defined in environments" % env_name)
+                else:
+                    # dct[key] = os.environ[env_name]
+                    print('${%s}' % env_name)
+                    print(os.environ.get(env_name))
+                    env_name1 = r'${%s}' % env_name
+                    env_name2 = r'$%s' % env_name
+                    print(env_name1)
+                    print(env_name2)
+                    print(value.replace(env_name1, os.environ.get(env_name)))
+                    value = value.replace(env_name1, os.environ.get(env_name)).replace(env_name2, os.environ.get(env_name))
+            dct[key] = value
     return dct
 
 
@@ -49,6 +61,14 @@ def as_parse_env(dct):
              "pandacache_url": "${PANDACACHE_URL}",
              "panda_verify_host": "${PANDA_VERIFY_HOST}",
              "test1": {"test2": "${TEST_ENV}"}
+            },
+         "database":
+            {"default": "postgresql://${IDDS_DATABASE_USER}:${IDDS_DATABASE_PASSWORD}@${IDDS_DATABASE_HOST}/${IDDS_DATABASE_NAME}",
+             "schema": "${IDDS_DATABASE_SCHEMA}",
+             "pool_size": 20,
+             "pool_recycle": 3600,
+             "echo": 0,
+             "pool_reset_on_return": "rollback"
             }
         }
 }
diff --git a/main/tools/env/merge_configmap.py b/main/tools/env/merge_configmap.py
index 4835f420..4f8764e2 100644
--- a/main/tools/env/merge_configmap.py
+++ b/main/tools/env/merge_configmap.py
@@ -36,13 +36,16 @@ def is_string(value):
 def as_parse_env(dct):
     for key in dct:
         value = dct[key]
-        if is_string(value) and value.startswith('$'):
-            env_match = re.search('\$\{*([^\}]+)\}*', value)     # noqa W605
-            env_name = env_match.group(1)
-            if env_name not in os.environ:
-                print("Error: %s is defined in configmap but is not defined in environments" % env_name)
-            else:
-                dct[key] = os.environ[env_name]
+        if is_string(value) and '$' in value:
+            env_matches = re.findall('\$\{*([^\}]+)\}*', value)     # noqa W605
+            for env_name in env_matches:
+                if env_name not in os.environ:
+                    print("Error: %s is defined in configmap but is not defined in environments" % env_name)
+                else:
+                    env_name1 = r'${%s}' % env_name
+                    env_name2 = r'$%s' % env_name
+                    value = value.replace(env_name1, os.environ.get(env_name)).replace(env_name2, os.environ.get(env_name))
+        dct[key] = value
     return dct