diff --git a/.github/workflows/CompatHelper.yml b/.github/workflows/CompatHelper.yml
new file mode 100644
index 0000000..cba9134
--- /dev/null
+++ b/.github/workflows/CompatHelper.yml
@@ -0,0 +1,16 @@
+name: CompatHelper
+on:
+  schedule:
+    - cron: 0 0 * * *
+  workflow_dispatch:
+jobs:
+  CompatHelper:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Pkg.add("CompatHelper")
+        run: julia -e 'using Pkg; Pkg.add("CompatHelper")'
+      - name: CompatHelper.main()
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
+        run: julia -e 'using CompatHelper; CompatHelper.main()'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..818cf23
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,44 @@
+name: CI
+on:
+  push:
+      paths-ignore:
+        - 'README.md'
+      branches:
+        - main
+  pull_request:
+      paths-ignore:
+        - 'README.md'
+      branches:
+        - main
+jobs:
+  test:
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - '1'
+          - 'min'
+          - 'nightly'
+        os:
+          - ubuntu-latest
+          - macOS-latest
+          - windows-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+      - name: Cache
+        uses: julia-actions/cache@v2
+        with:
+            cache-compiled: "true"
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1
+      - uses: julia-actions/julia-processcoverage@v1
+      - uses: codecov/codecov-action@v4
+        with:
+          files: lcov.info
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/Project.toml b/Project.toml
index 5a824dd..3a6047c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "EmbraceUncertainty"
 uuid = "81be8970-b14c-4107-8889-06289fef228c"
-authors = ["Phillip Alday <me@phillipalday.com>, Reinhold Kliegl <reinhold.kliegl@gmail.com>, Douglas Bates <dmbates@gmail.com>"]
+authors = ["Phillip Alday <me@phillipalday.com>", "Reinhold Kliegl <reinhold.kliegl@gmail.com>", "Douglas Bates <dmbates@gmail.com>"]
 version = "0.1.0"
 
 [deps]
@@ -44,7 +44,9 @@ ZipFile = "a5390f91-8eb1-5f08-bee0-b1d1ffed6cea"
 
 [compat]
 AlgebraOfGraphics = "0.6, 0.7, 0.8"
+Aqua = "0.8.7"
 Arrow = "2"
+BenchmarkTools = "1"
 CSV = "0.10"
 CairoMakie = "0.11, 0.12"
 CategoricalArrays = "0.10"
@@ -52,17 +54,22 @@ Chain = "0.5,0.6"
 DataAPI = "1"
 DataFrameMacros = "0.3,0.4"
 DataFrames = "1.3"
+Dates = "1"
 Distributions = "0.25"
 Downloads = "1"
 Effects = "1"
 FreqTables = "0.4"
 GLM = "1"
 LinearAlgebra = "1"
+Markdown = "1"
 MixedModels = "4,5"
+MixedModelsDatasets = "0.1.1"
 MixedModelsMakie = "0.4"
 NLopt = "1"
+Pkg = "1"
 PooledArrays = "1"
 RCall = "0.13,0.14"
+RectangularFullPacked = "0.2"
 Random = "1"
 SHA = "0.7"
 Scratch = "1"
@@ -71,6 +78,17 @@ StatsAPI = "1"
 StatsBase = "0.33, 0.34"
 StatsModels = "0.7"
 Tables = "1"
+TidierPlots = "0.8"
+Test = "1.11.0"
+TestSetExtensions = "3.0.0"
 TypedTables = "1"
 ZipFile = "0.10"
 julia = "1.8"
+
+[extras]
+Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+TestSetExtensions = "98d24dd4-01ad-11ea-1b02-c9a08f80db04"
+
+[targets]
+test = ["Aqua", "Test", "TestSetExtensions"]
diff --git a/test/runtests.jl b/test/runtests.jl
new file mode 100644
index 0000000..fed2815
--- /dev/null
+++ b/test/runtests.jl
@@ -0,0 +1,12 @@
+using Aqua
+using EmbraceUncertainty
+using Test
+using TestSetExtensions
+
+@testset ExtendedTestSet "EmbraceUncertainty" begin
+    @testset "Aqua" begin
+        # we can't test stale deps because the dependencies aren't 
+        # just for the package, but also for entire book
+        Aqua.test_all(EmbraceUncertainty; ambiguities=false, stale_deps=false)
+    end
+end