--- a/scripts/polynomial/polyfit.m
+++ b/scripts/polynomial/polyfit.m
@@ -140,8 +140,7 @@
 %!       315600.7143, 315602.9508, 315605.1765 ];
 %! [p1, s1] = polyfit (x, y, 10);
 %! [p2, s2, mu] = polyfit (x, y, 10);
-%! assert (s1.normr, 0.11264, 0.1)
-%! assert (s2.normr < s1.normr)
+%! assert (2*s2.normr < s1.normr)
 
 %!test
 %! x = 1:4;
@@ -160,7 +159,7 @@
 %! assert (p, pn, s.normr)
 %! assert (s.yf, y, s.normr)
 %! assert (mu, [mean(x), std(x)])
-%! assert (s.normr/s2.normr < 1e-9)
+%! assert (s.normr/s2.normr < sqrt(eps))
 
 %!test
 %! x = [1, 2, 3; 4, 5, 6];