diff --git a/source/MulensModel/modelparameters.py b/source/MulensModel/modelparameters.py
index b6c52be6..9c42e868 100644
--- a/source/MulensModel/modelparameters.py
+++ b/source/MulensModel/modelparameters.py
@@ -879,7 +879,7 @@ def _check_valid_parameter_values(self, parameters):
         for name in ['q']:
             if name in parameters.keys():
                 if parameters[name] <= 0.:
-                    msg = "Parameter {:} has to be in (0, 1) range, not {:}"
+                    msg = "Parameter {:} has to be larger than 0, not {:}"
                     raise ValueError(msg.format(name, parameters[name]))
 
         for name in ['xi_eccentricity']:
@@ -1234,8 +1234,8 @@ def q(self):
 
     @q.setter
     def q(self, new_q):
-        if new_q < 0.:
-            raise ValueError('mass ratio q has to be between 0 and 1')
+        if new_q <= 0.:
+            raise ValueError('mass ratio q has to be larger than 0')
         self.parameters['q'] = new_q
         self._update_sources('q', new_q)
 
diff --git a/source/MulensModel/tests/test_ModelParameters.py b/source/MulensModel/tests/test_ModelParameters.py
index 3115d5b2..1ebe6adf 100644
--- a/source/MulensModel/tests/test_ModelParameters.py
+++ b/source/MulensModel/tests/test_ModelParameters.py
@@ -173,7 +173,7 @@ def test_q_gt_1_is_good():
     planet.set_magnification_methods(list_of_methods)
     planet_2.set_magnification_methods(list_of_methods)
     planet_3.set_magnification_methods(list_of_methods)
-    t_range = np.arange(3580., 3600., 0.1)
+    t_range = [3580, 3589, 3590, 3592, 3593, 3595]
     magnifications_1 = planet.get_magnification(time=t_range)
     magnifications_2 = planet_2.get_magnification(time=t_range)
     magnifications_3 = planet_3.get_magnification(time=t_range)
@@ -200,7 +200,7 @@ def test_q_gt_1_is_smooth():
 
     planet.set_magnification_methods([3590., 'VBBL', 3595.])
     planet_2.set_magnification_methods([3590., 'VBBL', 3595.])
-    t_range = np.arange(3580., 3600., 0.1)
+    t_range = [3571, 3590.5, 3591, 3592, 3593.4, 3594.5]
     magnifications_1 = planet.get_magnification(time=t_range)
     magnifications_2 = planet_2.get_magnification(time=t_range)
 
diff --git a/source/MulensModel/version.py b/source/MulensModel/version.py
index db969b3a..def8f78c 100644
--- a/source/MulensModel/version.py
+++ b/source/MulensModel/version.py
@@ -1 +1 @@
-__version__ = "2.23.0"
+__version__ = "2.23.1"