diff --git a/test/acoustics-3D/Two-media/planar-symmetry.jl b/test/acoustics-3D/Two-media/planar-symmetry.jl
index 8ce88e5..f8d2663 100644
--- a/test/acoustics-3D/Two-media/planar-symmetry.jl
+++ b/test/acoustics-3D/Two-media/planar-symmetry.jl
@@ -90,7 +90,7 @@ end
 
     Reffs = [reflection_coefficient(w, source, material) for w in wavemodes]
 
-    @test abs(Reffs[1] - Rlows[1]) / abs(Rlows[1]) < 0.01
-    @test norm(Reffs - Rlows) / norm(Rlows) < 0.1
+    @test abs(Reffs[1] - Rlows[1]) / abs(Rlows[1]) < 0.0001
+    @test norm(Reffs - Rlows) / norm(Rlows) < 0.005
 end