diff --git a/dune/solvers/test/gssteptest.cc b/dune/solvers/test/gssteptest.cc
index 3a01a855a89857ead29505f335316bf2284e9787..872c9786ffc4e5910904074ded7a7c775f32ae76 100644
--- a/dune/solvers/test/gssteptest.cc
+++ b/dune/solvers/test/gssteptest.cc
@@ -137,7 +137,7 @@ struct GSTestSuite {
                                               type, reg ? "regularized" : "");
           test(&gsStep1, gsString1);
           test(gsStep2Ptr.get(), gsString2);
-          diffTest(&gsStep1, gsString1, gsStep2Ptr.get(), gsString2, 2e-9);
+          diffTest(&gsStep1, gsString1, gsStep2Ptr.get(), gsString2, 1e-8);
         }
       }
     }