diff --git a/README.md b/README.md
index b2637681..2f749cc0 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,8 @@
 [![Docs: dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://JuliaGaussianProcesses.github.io/AbstractGPs.jl/dev)
 [![CI](https://github.com/JuliaGaussianProcesses/AbstractGPs.jl/workflows/CI/badge.svg?branch=master)](https://github.com/JuliaGaussianProcesses/AbstractGPs.jl/actions/workflows/CI.yml?query=branch%3Amaster)
 [![Codecov](https://codecov.io/gh/JuliaGaussianProcesses/AbstractGPs.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaGaussianProcesses/AbstractGPs.jl)
-[![Code Style: Blue](https://img.shields.io/badge/code%20style-blue-4495d1.svg)](https://github.com/invenia/BlueStyle)
+[![Code Style: Blue](https://img.shields.io/badge/code%20style-blue-4495d1.svg)](https://github.com/JuliaDiff/BlueStyle)
+[![Aqua QA](https://raw.githubusercontent.com/JuliaTesting/Aqua.jl/master/badge.svg)](https://github.com/JuliaTesting/Aqua.jl)
 [![ColPrac: Contributor's Guide on Collaborative Practices for Community Packages](https://img.shields.io/badge/ColPrac-Contributor's%20Guide-blueviolet)](https://github.com/SciML/ColPrac)
 [![DOI](https://zenodo.org/badge/254674526.svg)](https://zenodo.org/badge/latestdoi/254674526)
 
diff --git a/test/Project.toml b/test/Project.toml
index 27e5552d..d21cdc67 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -1,4 +1,5 @@
 [deps]
+Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"
@@ -13,6 +14,7 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [compat]
+Aqua = "0.8"
 Distributions = "0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25"
 Documenter = "1"
 FillArrays = "0.11, 0.12, 0.13, 1"
diff --git a/test/runtests.jl b/test/runtests.jl
index cb88cbba..d5edac8d 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -17,6 +17,7 @@ using AbstractGPs:
     inducing_points,
     TestUtils
 
+using Aqua
 using Documenter
 using Distributions: MvNormal, PDMat, loglikelihood, Distributions
 using FillArrays
@@ -39,6 +40,11 @@ include("test_util.jl")
 
 @testset "AbstractGPs" begin
     if GROUP == "All" || GROUP == "AbstractGPs"
+        @testset "Code quality (Aqua.jl)" begin
+            Aqua.test_all(AbstractGPs; ambiguities=false)
+            # Ref https://github.com/JuliaTesting/Aqua.jl/issues/77
+            Aqua.test_ambiguities(AbstractGPs; recursive=false)
+        end
         @testset "util" begin
             include("util/common_covmat_ops.jl")
             include("util/plotting.jl")