diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 4e31f9f0..13a3ef30 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -13,6 +13,11 @@ concurrency:
   # Cancel intermediate builds, but only if it is a pull request build.
   cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 
+# needed to allow julia-actions/cache to delete old caches that it has created
+permissions:
+  actions: write
+  contents: read
+
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
@@ -22,6 +27,7 @@ jobs:
       matrix:
         version:
           - '1.6'
+          - 'lts'
           - '1'
 #          - 'nightly'
         os:
@@ -48,6 +54,17 @@ jobs:
       - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
+      - name: "Run doctests"
+        if: ${{ matrix.version == 'lts' }} # only run in one Julia version due to fluctuations
+        run: |
+          julia --project=docs --color=yes --code-coverage -e '
+            using Pkg
+            Pkg.develop(PackageSpec(path=pwd()))
+            Pkg.instantiate()
+            using Documenter
+            using DataStructures
+            DocMeta.setdocmeta!(DataStructures, :DocTestSetup, :(using DataStructures); recursive=true)
+            doctest(DataStructures)'
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v5
         with:
diff --git a/.github/workflows/Documenter.yml b/.github/workflows/Documenter.yml
index 5f7ba8b7..c151bf89 100644
--- a/.github/workflows/Documenter.yml
+++ b/.github/workflows/Documenter.yml
@@ -5,11 +5,13 @@ on:
     tags: [v*]
   pull_request:
 
+permissions:
+  actions: write   # needed to allow julia-actions/cache to delete old caches that it has created
+  contents: write  # needed to allow deploying docs
+  statuses: write
+
 jobs:
   Documenter:
-    permissions:
-      contents: write
-      statuses: write
     name: Documentation
     runs-on: ubuntu-latest
     steps:
@@ -18,7 +20,7 @@ jobs:
         with:
           version: '1'                         # replace this with whatever version you need
           show-versioninfo: true               # this causes versioninfo to be printed to the action log
-      - uses: julia-actions/cache@v2              # cache using https://github.com/julia-actions/cache
+      - uses: julia-actions/cache@v2           # cache using https://github.com/julia-actions/cache
       - uses: julia-actions/julia-buildpkg@v1  # if package requires Pkg.build()
       - uses: julia-actions/julia-docdeploy@v1
         env:
diff --git a/docs/make.jl b/docs/make.jl
index 5656f41d..5425b03e 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -6,6 +6,7 @@ DocMeta.setdocmeta!(DataStructures, :DocTestSetup, :(using DataStructures); recu
 makedocs(
     sitename = "DataStructures.jl",
     warnonly = true,  # FIXME: address all warnings and resolve them
+    doctest = true,
     pages = [
         "index.md",
         "deque.md",