tweak tols

Author: baggepinnen

test/test_frd.jl

@@ -75,9 +75,9 @@ plot!(√N2, subplot = 2, lab = "N Est W", alpha = 0.3, title = "Noise model")
     plot(c, yscale=:identity)
     coherenceplot(d)
 
-    @test mean(c.r) > 0.99
+    @test mean(c.r) > 0.95
     using ControlSystemIdentification: rad
-    @test mean(c[0.999rad:1.001rad].r) < 0.2 # low coherence at disturbance frequency
+    @test minimum(c[0.99rad:1.01rad].r) < 0.2 # low coherence at disturbance frequency
 end