diff --git a/src/utilities.jl b/src/utilities.jl
index 15d125100..3465ee25f 100644
--- a/src/utilities.jl
+++ b/src/utilities.jl
@@ -27,7 +27,7 @@ end
 # Allocate for maxiumum possible length of polynomial vector?
 #
 # This function rely on that the every complex roots is followed by its exact conjugate,
-# and that the first complex root in each pair has imaginary real part. This formaat is always
+# and that the first complex root in each pair has positive real part. This format is always
 # returned by LAPACK routines for eigenvalues.
 function roots2real_poly_factors(roots::Vector{cT}) where cT <: Number
     T = real(cT)
diff --git a/test/test_synthesis.jl b/test/test_synthesis.jl
index b0b11e032..ceb5a2e7e 100644
--- a/test/test_synthesis.jl
+++ b/test/test_synthesis.jl
@@ -63,11 +63,11 @@ A = randn(3,3)
 B = randn(3,1)
 p = [3.0,2,1]
 K = ControlSystems.acker(A,B,p)
-@test eigvals(A-B*K, sortby=nothing) ≈ p
+@test eigvalsnosort(A-B*K) ≈ p
 
 p = [-1+im, -1-im, -1]
 K = ControlSystems.acker(A,B,p)
-@test eigvals(A-B*K, sortby=nothing) ≈ p
+@test eigvalsnosort(A-B*K) ≈ p
 end
 
 end