diff --git a/.github/workflows/pr_check.yml b/.github/workflows/pr_check.yml
index 55797bc7..16ad35a2 100644
--- a/.github/workflows/pr_check.yml
+++ b/.github/workflows/pr_check.yml
@@ -5,7 +5,7 @@ on:
   push:
 
 jobs:
-  run_tests:
+  tests:
     name: unit tests
     runs-on: ${{ matrix.os }}
     strategy:
@@ -38,6 +38,43 @@ jobs:
           nvim --version
           make test
 
+  lua-language-server:
+    name: unit tests
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-22.04
+            rev: nightly/nvim-linux64.tar.gz
+            version: nightly
+          - os: ubuntu-22.04
+            rev: v0.9.1/nvim-linux64.tar.gz
+            version: stable
+    steps:
+      - uses: actions/checkout@v3
+      - run: date +%F > todays-date
+      - name: Restore cache for today's nightly.
+        uses: actions/cache@v3
+        with:
+          path: _neovim
+          key: ${{ runner.os }}-${{ matrix.rev }}-${{ hashFiles('todays-date') }}
+      - name: Prepare
+        run: |
+          test -d _neovim || {
+            mkdir -p _neovim
+            curl -sL "https://github.com/neovim/neovim/releases/download/${{ matrix.rev }}" | tar xzf - --strip-components=1 -C "${PWD}/_neovim"
+          }
+          git clone https://github.com/LuaLS/lua-language-server
+          cd lua-language-server && ./make.sh
+
+      - name: Run check
+        run: |
+          export PATH="${PWD}/_neovim/bin:${PATH}"
+          export VIM="${PWD}/_neovim/share/nvim/runtime"
+          nvim --version
+          make lua-language-server version=${{ matrix.version }}
+
   stylua:
     name: stylua
     runs-on: ubuntu-22.04
diff --git a/Makefile b/Makefile
index 186bb76c..a176615b 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,9 @@ test: dependencies
 lint:
 	luacheck .
 
+lua-language-server:
+	lua-language-server --configpath .ci.$(version).luarc.json --logpath lua-language-server-log --check .
+
 dependencies:
 	if [ ! -d vendor ]; then \
 		git clone --depth 1 \