diff --git a/pkgs/applications/science/math/sage/default.nix b/pkgs/applications/science/math/sage/default.nix
index 832b2f11056..46e60a2b81e 100644
--- a/pkgs/applications/science/math/sage/default.nix
+++ b/pkgs/applications/science/math/sage/default.nix
@@ -129,6 +129,7 @@ let
     # https://trac.sagemath.org/ticket/25674
     R = pkgs.R.overrideAttrs (attrs: rec {
       name = "R-3.4.4";
+      doCheck = false;
       src = fetchurl {
         url = "http://cran.r-project.org/src/base/R-3/${name}.tar.gz";
         sha256 = "0dq3jsnwsb5j3fhl0wi3p5ycv8avf8s5j1y4ap3d2mkjmcppvsdk";
diff --git a/pkgs/applications/science/math/sage/sage-tests.nix b/pkgs/applications/science/math/sage/sage-tests.nix
index feccf75a7ac..1f400db18fc 100644
--- a/pkgs/applications/science/math/sage/sage-tests.nix
+++ b/pkgs/applications/science/math/sage/sage-tests.nix
@@ -46,6 +46,6 @@ stdenv.mkDerivation rec {
     mkdir -p "$HOME"
 
     # "--long" tests are in the order of 1h, without "--long" its 1/2h
-    "sage" -t --nthreads "$NIX_BUILD_CORES" --optional=sage ${patienceSpecifier} ${testArgs}
+    "sage" -t --timeout=0 --nthreads "$NIX_BUILD_CORES" --optional=sage ${patienceSpecifier} ${testArgs}
   '';
 }