diff --git a/+unittests/+signals/signalsTest.m b/+unittests/+signals/signalsTest.m
index 48366a7ad8b1ed99940e26214c3942894ef9c5f5..26d892466421e96fd3d76960828e710c1fe1e0d2 100644
--- a/+unittests/+signals/signalsTest.m
+++ b/+unittests/+signals/signalsTest.m
@@ -149,7 +149,7 @@ function test_BasicVariable_fDiff(testCase)
 		% compute the fractional derivative numerically
 		b_fdiff(k,1) = b.fDiff(k*p);
 	end
-	plot(f_fdiff - b_fdiff)
+	% plot(f_fdiff - b_fdiff)
 	
 	
 	testCase.verifyEqual( b_fdiff.on(), f_fdiff.on(), 'AbsTol', 1e-2)