diff --git a/prody/tests/dynamics/test_anmd.py b/prody/tests/dynamics/test_anmd.py
index 25f499c96..27240c59f 100644
--- a/prody/tests/dynamics/test_anmd.py
+++ b/prody/tests/dynamics/test_anmd.py
@@ -80,7 +80,7 @@ def testResultsNumModes1(self):
 
             ens1.setCoords(ens1.getCoordsets()[2])
             assert_allclose(ens1.getRMSDs(), ENSEMBLE.getRMSDs(), 
-                            rtol=1e-10, atol=0.2, # may not be so close
+                            rtol=1e-10, atol=0.25, # may not be so close
                             err_msg='runANMD with num_modes=1 failed to give expected RMSDs')
 
 if __name__ == '__main__':