diff --git a/README.md b/README.md
index 2b2358b..bad2aae 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 *Zeros of the Bessel J and Y functions*
 
 [![Build Status](https://github.com/JuliaMath/FunctionZeros.jl/actions/workflows/CI.yml/badge.svg?branch=master)](https://github.com/JuliaMath/FunctionZeros.jl/actions/workflows/CI.yml?query=branch%3Amaster)
-[![Coverage Status](https://coveralls.io/repos/github/JuliaMath/FunctionZeros.jl/badge.svg?branch=master)](https://coveralls.io/github/JuliaMath/FunctionZeros.jl?branch=master)
+[![Codecov](https://codecov.io/gh/JuliaMath/ILog2.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaMath/FunctionZeros.jl)
 [![Aqua QA](https://raw.githubusercontent.com/JuliaTesting/Aqua.jl/master/badge.svg)](https://github.com/JuliaTesting/Aqua.jl)
 [![JET QA](https://img.shields.io/badge/JET.jl-%E2%9C%88%EF%B8%8F-%23aa4444)](https://github.com/aviatesk/JET.jl)
 
diff --git a/test/aqua_test.jl b/test/aqua_test.jl
index 724215a..499e94d 100644
--- a/test/aqua_test.jl
+++ b/test/aqua_test.jl
@@ -22,7 +22,7 @@ if VERSION >= v"1.1"
     end
 end
 
-@testset "aqua piracy" begin
+@testset "aqua piracies" begin
     Aqua.test_piracies(PkgName)
 end
 
diff --git a/test/runtests.jl b/test/runtests.jl
index e61ee98..e2aa123 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -134,3 +134,7 @@ end
     end
     @test isapprox(bessely_zero(20, 1), 22.625159280072324)
 end
+
+@testset "asymptotic" begin
+    FunctionZeros.bessel_zero_asymptotic(4, 2, 1) == FunctionZeros.besselj_zero_asymptotic(4, 2)
+end