diff --git a/CHANGES.rst b/CHANGES.rst
index 766100a6..85418cba 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,7 @@
+v0.12.6
+=======
+- Updated pycvodes req. version (>=v0.11.15)
+
 v0.12.5
 =======
 - Fix for ew_ele in native CVode(s) interface.
diff --git a/pyodesys/native/tests/_test_robertson_native.py b/pyodesys/native/tests/_test_robertson_native.py
index 042a9002..eea21d70 100644
--- a/pyodesys/native/tests/_test_robertson_native.py
+++ b/pyodesys/native/tests/_test_robertson_native.py
@@ -51,7 +51,7 @@ class TransformedNativeSys(TransformedSys, NativeSys):
 
     for sys_iter, kw in [
             ([our_sys, ori_sys], {
-                'nsteps': [100*steps_fact, 1613*1.01*steps_fact],
+                'nsteps': [100*steps_fact, 1613*1.05*steps_fact],
                 'return_on_error': [True, False]
             }),
             ([ori_sys], {