diff --git a/pkgs/applications/science/math/sage/patches/Only-test-py2-py3-optional-tests-when-all-of-sage-is.patch b/pkgs/applications/science/math/sage/patches/Only-test-py2-py3-optional-tests-when-all-of-sage-is.patch
index 2a7dc13756d..8cd80281d0e 100644
--- a/pkgs/applications/science/math/sage/patches/Only-test-py2-py3-optional-tests-when-all-of-sage-is.patch
+++ b/pkgs/applications/science/math/sage/patches/Only-test-py2-py3-optional-tests-when-all-of-sage-is.patch
@@ -1,14 +1,14 @@
-From c8edfefbbec87ca776d3cf84ee895aac200dda40 Mon Sep 17 00:00:00 2001
+From 8218bd4fdeb4c92de8af0d3aabec55980fc4fb3d Mon Sep 17 00:00:00 2001
 From: Timo Kaufmann <timokau@zoho.com>
 Date: Sun, 21 Oct 2018 17:52:40 +0200
 Subject: [PATCH] Only test py2/py3 optional tests when all of sage is tested
 
 ---
- src/sage/doctest/control.py | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
+ src/sage/doctest/control.py | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
 
 diff --git a/src/sage/doctest/control.py b/src/sage/doctest/control.py
-index bf18df8b2b..b04af0e2e8 100644
+index bf18df8b2b..935c67abf7 100644
 --- a/src/sage/doctest/control.py
 +++ b/src/sage/doctest/control.py
 @@ -362,7 +362,8 @@ class DocTestController(SageObject):
@@ -21,6 +21,15 @@ index bf18df8b2b..b04af0e2e8 100644
  
          self.options = options
  
+@@ -765,7 +766,7 @@ class DocTestController(SageObject):
+             sage: DC = DocTestController(DD, [dirname])
+             sage: DC.expand_files_into_sources()
+             sage: sorted(DC.sources[0].options.optional)  # abs tol 1
+-            ['guava', 'magma', 'py2']
++            ['guava', 'magma']
+ 
+         We check that files are skipped appropriately::
+ 
 -- 
 2.18.1
 
diff --git a/pkgs/development/python-modules/cypari2/default.nix b/pkgs/development/python-modules/cypari2/default.nix
index 6df19e4c94b..a77e98dae4c 100644
--- a/pkgs/development/python-modules/cypari2/default.nix
+++ b/pkgs/development/python-modules/cypari2/default.nix
@@ -11,11 +11,12 @@
 
 buildPythonPackage rec {
   pname = "cypari2";
-  version = "1.2.1";
+  # upgrade may break sage, please test the sage build or ping @timokau on upgrade
+  version = "1.3.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0v2kikwf0advq8j76nwzhlacwj1yys9cvajm4fqgmasjdsnf1q4k";
+    sha256 = "04f00xp8aaz37v00iqg1mv5wjq00a5qhk8cqa93s13009s9x984r";
   };
 
   # This differs slightly from the default python installPhase in that it pip-installs