diff --git a/evennia/server/profiling/memplot.py b/evennia/server/profiling/memplot.py
index e8d7e76b12..c6a227a370 100644
--- a/evennia/server/profiling/memplot.py
+++ b/evennia/server/profiling/memplot.py
@@ -13,14 +13,14 @@ import time
 # TODO!
 #sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))))
 #os.environ['DJANGO_SETTINGS_MODULE'] = 'game.settings'
-import ev
-from evennia.utils.idmapper import base as _idmapper
+import evennia
+from evennia.utils.idmapper import models as _idmapper
 
 LOGFILE = "logs/memoryusage.log"
 INTERVAL = 30  # log every 30 seconds
 
 
-class Memplot(ev.Script):
+class Memplot(evennia.DefaultScript):
     """
     Describes a memory plotting action.
 
diff --git a/evennia/server/profiling/tests.py b/evennia/server/profiling/tests.py
index b3e9fba8d5..cca4e0d99b 100644
--- a/evennia/server/profiling/tests.py
+++ b/evennia/server/profiling/tests.py
@@ -1,7 +1,8 @@
 from django.test import TestCase
-from mock import Mock
+from mock import Mock, patch, mock_open
 from .dummyrunner_settings import (c_creates_button, c_creates_obj, c_digs, c_examines, c_help, c_idles, c_login,
                                    c_login_nodig, c_logout, c_looks, c_moves, c_moves_n, c_moves_s, c_socialize)
+import memplot
 
 
 class TestDummyrunnerSettings(TestCase):
@@ -91,3 +92,21 @@ class TestDummyrunnerSettings(TestCase):
 
     def test_c_move_s(self):
         self.assertEqual(c_moves_s(self.client), "south")
+
+
+class TestMemPlot(TestCase):
+    @patch.object(memplot, "_idmapper")
+    @patch.object(memplot, "os")
+    @patch.object(memplot, "open", new_callable=mock_open, create=True)
+    @patch.object(memplot, "time")
+    def test_memplot(self, mock_time, mocked_open, mocked_os, mocked_idmapper):
+        from evennia.utils.create import create_script
+        mocked_idmapper.cache_size.return_value = (9, 5000)
+        mock_time.time = Mock(return_value=6000.0)
+        script = create_script(memplot.Memplot)
+        script.db.starttime = 0.0
+        mocked_os.popen.read.return_value = 5000.0
+        script.at_repeat()
+        handle = mocked_open()
+        handle.write.assert_called_with('100.0, 0.001, 0.001, 9\n')
+        script.stop()