diff --git a/ChangeLog b/ChangeLog
index bfc9572a1..aab5e6582 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -51,6 +51,8 @@
           Reeder).
 - TW-1626 Wrong wait date (thanks to Andrea Rizzi).
 - TW-1632 Japanese translation for Taskwarrior(150713) (thanks to ribbon).
+- TW-1634 due.not:<date> excludes only tasks scheduled at mitnight (thanks to
+          Tomas Babej).
 - Prevent potential task duplication during import for non-pending tasks.
 - Show the active context in "context list", if any is active.
 - Fix "task edit" dropping annotation text after newlines.
diff --git a/src/CLI2.cpp b/src/CLI2.cpp
index 82644aa57..a1fb95eab 100644
--- a/src/CLI2.cpp
+++ b/src/CLI2.cpp
@@ -1157,14 +1157,19 @@ void CLI2::desugarFilterAttributes ()
           op.attribute ("raw", "!==");
           rhs.attribute ("raw", "''");
         }
-        else if (mod == "is" || mod == "equals")
+        else if (mod == "is")
+        {
+          op.attribute ("raw", "=");
+          rhs.attribute ("raw", value);
+        }
+        else if (mod == "equals")
         {
           op.attribute ("raw", "==");
           rhs.attribute ("raw", value);
         }
         else if (mod == "isnt" || mod == "not")
         {
-          op.attribute ("raw", "!==");
+          op.attribute ("raw", "!=");
           rhs.attribute ("raw", value);
         }
         else if (mod == "has" || mod == "contains")
diff --git a/test/tw-1634.t b/test/tw-1634.t
index ee3c93dda..e04f47f2b 100755
--- a/test/tw-1634.t
+++ b/test/tw-1634.t
@@ -40,44 +40,45 @@ class Test1634(TestCase):
         self.t = Task()
 
         # Setup some tasks due on 2015-07-07
-        self.t('add due:2015-07-07T00:00:00 on due date 1')
-        self.t('add due:2015-07-07T08:00:00 on due date 2')
-        self.t('add due:2015-07-07T14:34:56 on due date 3')
-        self.t('add due:2015-07-07T22:00:00 on due date 4')
-        self.t('add due:2015-07-07T23:59:59 on due date 5')
+        self.t('add due:2015-07-07T00:00:00 ON1')
+        self.t('add due:2015-07-07T14:34:56 ON2')
+        self.t('add due:2015-07-07T23:59:59 ON3')
 
         # Setup some tasks not due on 2015-07-07
-        self.t('add due:2015-07-06T23:59:59 not on due date 1')
-        self.t('add due:2015-07-08T00:00:00 not on due date 2')
-        self.t('add due:2015-07-08T00:00:01 not on due date 3')
-        self.t('add due:2015-07-06T00:00:00 not on due date 4')
-
+        self.t('add due:2015-07-06T23:59:59 OFF4')
+        self.t('add due:2015-07-08T00:00:00 OFF5')
+        self.t('add due:2015-07-08T00:00:01 OFF6')
+        self.t('add due:2015-07-06T00:00:00 OFF7')
 
     def test_due_match_not_exact(self):
         """Test that due:<date> matches any task that date."""
-
         code, out, err = self.t('due:2015-07-07 minimal')
 
-        # Assert that each task on 2015-07-07 is listed
-        for i in range(1,5):
-            self.assertIn("on due date {0}".format(i), out)
+        # Asswer that only tasks ON the date are listed.
+        self.assertIn("ON1", out)
+        self.assertIn("ON2", out)
+        self.assertIn("ON3", out)
 
-        # Assert that no task not on 2015-07-07 is not listed
-        for i in range(1,4):
-            self.assertNotIn("not on due date {0}".format(i), out)
+        # Assert that tasks on other dates are not listed.
+        self.assertNotIn("OFF4", out)
+        self.assertNotIn("OFF5", out)
+        self.assertNotIn("OFF6", out)
+        self.assertNotIn("OFF7", out)
 
     def test_due_not_match_not_exact(self):
         """Test that due.not:<date> does not match any task that date."""
-
         code, out, err = self.t('due.not:2015-07-07 minimal')
 
-        # Assert that every task not on 2015-07-07 is listed
-        for i in range(1,4):
-            self.assertIn("not on due date {0}".format(i), out)
+        # Assert that task ON the date are not listed.
+        self.assertNotIn("ON1", out)
+        self.assertNotIn("ON2", out)
+        self.assertNotIn("ON3", out)
 
-        # Assert that each task on 2015-07-07 is listed
-        for i in range(1,5):
-            self.assertNotIn("on due date {0}".format(i), out)
+        # Assert that tasks on other dates are listed.
+        self.assertIn("OFF4", out)
+        self.assertIn("OFF5", out)
+        self.assertIn("OFF6", out)
+        self.assertIn("OFF7", out)
 
 
 if __name__ == "__main__":